| <!doctype html> |
| <html lang="zh-CN" data-theme="light"> |
| <head> |
| <meta charset="utf-8" /> |
| <meta name="viewport" content="width=device-width,initial-scale=1" /> |
| <meta name="generator" content="VuePress 2.0.0-rc.26" /> |
| <meta name="theme" content="VuePress Theme Hope 2.0.0-rc.99" /> |
| <style> |
| :root { |
| --vp-c-bg: #fff; |
| } |
| |
| [data-theme="dark"] { |
| --vp-c-bg: #1b1b1f; |
| } |
| |
| html, |
| body { |
| background: var(--vp-c-bg); |
| } |
| </style> |
| <script> |
| const userMode = localStorage.getItem("vuepress-theme-hope-scheme"); |
| const systemDarkMode = |
| window.matchMedia && |
| window.matchMedia("(prefers-color-scheme: dark)").matches; |
| |
| if (userMode === "dark" || (userMode !== "light" && systemDarkMode)) { |
| document.documentElement.setAttribute("data-theme", "dark"); |
| } |
| </script> |
| <script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"JDBC","image":[""],"dateModified":"2025-04-22T04:18:28.000Z","author":[]}</script><meta property="og:url" content="https://iotdb.apache.org/zh/UserGuide/dev-1.3/API/Programming-JDBC.html"><meta property="og:site_name" content="IoTDB Website"><meta property="og:title" content="JDBC"><meta property="og:description" content="JDBC 注意: 目前的JDBC实现仅是为与第三方工具连接使用的。不推荐使用 JDBC （执行插入语句时），因无法提供高性能写入，查询推荐使用 JDBC。 对于Java应用，我们推荐使用* 依赖 JDK >= 1.8 Maven >= 3.6 安装方法 在根目录下执行下面的命令： 在 MAVEN 中使用 IoTDB JDBC 示例代码 本章提供了如何建..."><meta property="og:type" content="article"><meta property="og:locale" content="zh-CN"><meta property="og:locale:alternate" content="en-US"><meta property="og:updated_time" content="2025-04-22T04:18:28.000Z"><meta property="article:modified_time" content="2025-04-22T04:18:28.000Z"><link rel="alternate" hreflang="en-us" href="https://iotdb.apache.org/UserGuide/dev-1.3/API/Programming-JDBC.html"><script async src="https://widget.kapa.ai/kapa-widget.bundle.js" data-website-id="2d37bfdd-8d98-40ba-9223-9d4f81bfb327" data-project-name="Apache IoTDB" data-project-color="#FFFFFF" data-button-z-index="1999" data-button-padding="4px" data-button-border-radius="4px" data-button-image-height="24px" data-button-image-width="20px" data-button-text-color="#9E2878" data-project-logo="https://iotdb.apache.org/img/logo.svg" data-button-position-right="16px" data-button-position-bottom="8px" data-button-height="56px" data-button-width="48px" data-button-text="Ask" data-modal-override-open-selector="#custom-ask-ai-button" data-modal-image-width="150px" data-modal-title="AI Docs" data-modal-title-color="#9E2878" data-deep-thinking-button-active-bg-color="#F6F7F8" data-deep-thinking-button-active-text-color="#9E2878" data-deep-thinking-button-active-hover-text-color="#9E2878" data-modal-disclaimer="这是一个针对 Apache IoTDB 的定制化大型语言模型，能够访问所有[文档](iotdb.apache.org/docs/)、[GitHub 公开问题、PR 和自述文件](github.com/apache/iotdb)。 |
| |
| 如果您遇到 <Error in verifying browser for feedback submission. Captcha token could not be obtained.> 请确保您能够顺畅访问 Google 服务。" data-user-analytics-fingerprint-enabled="true" data-consent-required="true" data-consent-screen-disclaimer="点击<I agree, let's chat>即表示您同意按照 kapa.ai 的[隐私政策](https://www.kapa.ai/content/privacy-policy)使用 AI 助手。本服务使用 reCAPTCHA，您需要同意 Google 的[隐私政策](https://policies.google.com/privacy)和[服务条款](https://policies.google.com/terms)。继续操作即表示您明确同意 kapa.ai 和 Google 的隐私政策。" data-language="zh"></script><link rel="icon" href="/favicon.ico"><meta name="Description" content="Apache IoTDB: Time Series Database for IoT"><meta name="Keywords" content="TSDB, time series, time series database, IoTDB, IoT database, IoT data management, 时序数据库, 时间序列管理, IoTDB, 物联网数据库, 实时数据库, 物联网数据管理, 物联网数据"><meta name="baidu-site-verification" content="wfKETzB3OT"><meta name="google-site-verification" content="mZWAoRY0yj_HAr-s47zHCGHzx5Ju-RVm5wDbPnwQYFo"><script type="text/javascript">var _paq = window._paq = window._paq || []; |
| /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ |
| _paq.push(["setDoNotTrack", true]); |
| _paq.push(["disableCookies"]); |
| _paq.push(['trackPageView']); |
| _paq.push(['enableLinkTracking']); |
| (function() { |
| var u="https://analytics.apache.org/"; |
| _paq.push(['setTrackerUrl', u+'matomo.php']); |
| _paq.push(['setSiteId', '56']); |
| var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; |
| g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); |
| })(); |
| </script><title>JDBC | IoTDB Website</title><meta name="description" content="JDBC 注意: 目前的JDBC实现仅是为与第三方工具连接使用的。不推荐使用 JDBC （执行插入语句时），因无法提供高性能写入，查询推荐使用 JDBC。 对于Java应用，我们推荐使用* 依赖 JDK >= 1.8 Maven >= 3.6 安装方法 在根目录下执行下面的命令： 在 MAVEN 中使用 IoTDB JDBC 示例代码 本章提供了如何建..."> |
| <link rel="preload" href="/assets/style-JraSdRX4.css" as="style"><link rel="stylesheet" href="/assets/style-JraSdRX4.css"> |
| <link rel="modulepreload" href="/assets/app-pmkzp6TS.js"><link rel="modulepreload" href="/assets/Programming-JDBC.html-VQbAf_He.js"> |
| |
| </head> |
| <body> |
| <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="vp-skip-link sr-only">跳至主要內容</a><!--]--><!--[--><div class="theme-container external-link-icon has-toc" vp-container><!--[--><header id="navbar" class="vp-navbar" vp-navbar><div class="vp-navbar-start"><button type="button" class="vp-toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!--[--><a class="route-link vp-brand" href="/zh/" aria-label="带我回家"><img class="vp-nav-logo" src="/logo.png" alt><!----><!----></a><!--]--></div><div class="vp-navbar-center"><!--[--><!--]--></div><div class="vp-navbar-end"><!--[--><!--[--><div id="docsearch-container" style="display:none;"></div><div class="docsearch-placeholder"><button type="button" aria-label="搜索文档" aria-keyshortcuts="Control+k" class="DocSearch DocSearch-Button"><span class="DocSearch-Button-Container"><svg width="20" height="20" viewBox="0 0 24 24" aria-hidden="true" class="DocSearch-Search-Icon"><circle cx="11" cy="11" r="8" stroke="currentColor" fill="none" stroke-width="1.4"></circle><path d="m21 21-4.3-4.3" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">搜索文档</span></span><span class="DocSearch-Button-Keys"><kbd class="DocSearch-Button-Key DocSearch-Button-Key--ctrl">Ctrl</kbd><kbd class="DocSearch-Button-Key">K</kbd></span></button></div><!--]--><div><button id="custom-ask-ai-button"> ✨ Ask AI </button></div><nav class="vp-nav-links"><div class="vp-nav-item hide-in-mobile"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="文档"><!--[--><!---->文档<!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/latest/QuickStart/QuickStart_apache.html" aria-label="v2.0.x"><!---->v2.0.x<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/V1.3.x/QuickStart/QuickStart_apache.html" aria-label="v1.3.x"><!---->v1.3.x<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/V1.2.x/QuickStart/QuickStart.html" aria-label="v1.2.x"><!---->v1.2.x<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/V0.13.x/QuickStart/QuickStart.html" aria-label="v0.13.x"><!---->v0.13.x<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><a class="auto-link external-link" href="https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=177051872" aria-label="系统设计" rel="noopener noreferrer" target="_blank"><!---->系统设计<!----></a></div><div class="vp-nav-item hide-in-mobile"><a class="route-link auto-link" href="/zh/Download/" aria-label="下载"><!---->下载<!----></a></div><div class="vp-nav-item hide-in-mobile"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="社区"><!--[--><!---->社区<!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/About.html" aria-label="关于社区"><!---->关于社区<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Development-Guide.html" aria-label="贡献指南"><!---->贡献指南<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Community-Partners.html" aria-label="社区伙伴"><!---->社区伙伴<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Feedback.html" aria-label="交流与反馈"><!---->交流与反馈<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Events-and-Reports.html" aria-label="活动与报告"><!---->活动与报告<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Committers.html" aria-label="Committers"><!---->Committers<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="ASF"><!--[--><!---->ASF<!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/" aria-label="基金会" rel="noopener noreferrer" target="_blank"><!---->基金会<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/licenses/" aria-label="许可证" rel="noopener noreferrer" target="_blank"><!---->许可证<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/security/" aria-label="安全" rel="noopener noreferrer" target="_blank"><!---->安全<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/foundation/sponsorship.html" aria-label="赞助" rel="noopener noreferrer" target="_blank"><!---->赞助<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/foundation/thanks.html" aria-label="致谢" rel="noopener noreferrer" target="_blank"><!---->致谢<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/events/current-event" aria-label="活动" rel="noopener noreferrer" target="_blank"><!---->活动<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://privacy.apache.org/policies/privacy-policy-public.html" aria-label="隐私" rel="noopener noreferrer" target="_blank"><!---->隐私<!----></a></li></ul></button></div></div></nav><div class="vp-nav-item"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="选择语言"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon i18n-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="i18n icon" name="i18n" style="width:1rem;height:1rem;vertical-align:middle;"><path d="M379.392 460.8 494.08 575.488l-42.496 102.4L307.2 532.48 138.24 701.44l-71.68-72.704L234.496 460.8l-45.056-45.056c-27.136-27.136-51.2-66.56-66.56-108.544h112.64c7.68 14.336 16.896 27.136 26.112 35.84l45.568 46.08 45.056-45.056C382.976 312.32 409.6 247.808 409.6 204.8H0V102.4h256V0h102.4v102.4h256v102.4H512c0 70.144-37.888 161.28-87.04 210.944L378.88 460.8zM576 870.4 512 1024H409.6l256-614.4H768l256 614.4H921.6l-64-153.6H576zM618.496 768h196.608L716.8 532.48 618.496 768z"></path></svg><!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="route-link auto-link" href="/UserGuide/dev-1.3/API/Programming-JDBC.html" aria-label="English"><!---->English<!----></a></li><li class="vp-dropdown-item"><a class="route-link route-link-active auto-link" href="/zh/UserGuide/dev-1.3/API/Programming-JDBC.html" aria-label="简体中文"><!---->简体中文<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><button type="button" class="vp-color-mode-switch" id="color-mode-switch"><svg xmlns="http://www.w3.org/2000/svg" class="icon auto-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="auto icon" name="auto" style="display:none;"><path d="M512 992C246.92 992 32 777.08 32 512S246.92 32 512 32s480 214.92 480 480-214.92 480-480 480zm0-840c-198.78 0-360 161.22-360 360 0 198.84 161.22 360 360 360s360-161.16 360-360c0-198.78-161.22-360-360-360zm0 660V212c165.72 0 300 134.34 300 300 0 165.72-134.28 300-300 300z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon dark-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="dark icon" name="dark" style="display:none;"><path d="M524.8 938.667h-4.267a439.893 439.893 0 0 1-313.173-134.4 446.293 446.293 0 0 1-11.093-597.334A432.213 432.213 0 0 1 366.933 90.027a42.667 42.667 0 0 1 45.227 9.386 42.667 42.667 0 0 1 10.24 42.667 358.4 358.4 0 0 0 82.773 375.893 361.387 361.387 0 0 0 376.747 82.774 42.667 42.667 0 0 1 54.187 55.04 433.493 433.493 0 0 1-99.84 154.88 438.613 438.613 0 0 1-311.467 128z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon light-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="light icon" name="light" style="display:block;"><path d="M952 552h-80a40 40 0 0 1 0-80h80a40 40 0 0 1 0 80zM801.88 280.08a41 41 0 0 1-57.96-57.96l57.96-58a41.04 41.04 0 0 1 58 58l-58 57.96zM512 752a240 240 0 1 1 0-480 240 240 0 0 1 0 480zm0-560a40 40 0 0 1-40-40V72a40 40 0 0 1 80 0v80a40 40 0 0 1-40 40zm-289.88 88.08-58-57.96a41.04 41.04 0 0 1 58-58l57.96 58a41 41 0 0 1-57.96 57.96zM192 512a40 40 0 0 1-40 40H72a40 40 0 0 1 0-80h80a40 40 0 0 1 40 40zm30.12 231.92a41 41 0 0 1 57.96 57.96l-57.96 58a41.04 41.04 0 0 1-58-58l58-57.96zM512 832a40 40 0 0 1 40 40v80a40 40 0 0 1-80 0v-80a40 40 0 0 1 40-40zm289.88-88.08 58 57.96a41.04 41.04 0 0 1-58 58l-57.96-58a41 41 0 0 1 57.96-57.96z"></path></svg></button></div><div class="vp-nav-item vp-action"><a class="vp-action-link" href="https://github.com/apache/iotdb" target="_blank" rel="noopener noreferrer" aria-label="GitHub"><svg xmlns="http://www.w3.org/2000/svg" class="icon github-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="github icon" name="github" style="width:1.25rem;height:1.25rem;vertical-align:middle;"><path d="M511.957 21.333C241.024 21.333 21.333 240.981 21.333 512c0 216.832 140.544 400.725 335.574 465.664 24.49 4.395 32.256-10.07 32.256-23.083 0-11.69.256-44.245 0-85.205-136.448 29.61-164.736-64.64-164.736-64.64-22.315-56.704-54.4-71.765-54.4-71.765-44.587-30.464 3.285-29.824 3.285-29.824 49.195 3.413 75.179 50.517 75.179 50.517 43.776 75.008 114.816 53.333 142.762 40.79 4.523-31.66 17.152-53.377 31.19-65.537-108.971-12.458-223.488-54.485-223.488-242.602 0-53.547 19.114-97.323 50.517-131.67-5.035-12.33-21.93-62.293 4.779-129.834 0 0 41.258-13.184 134.912 50.346a469.803 469.803 0 0 1 122.88-16.554c41.642.213 83.626 5.632 122.88 16.554 93.653-63.488 134.784-50.346 134.784-50.346 26.752 67.541 9.898 117.504 4.864 129.834 31.402 34.347 50.474 78.123 50.474 131.67 0 188.586-114.73 230.016-224.042 242.09 17.578 15.232 33.578 44.672 33.578 90.454v135.85c0 13.142 7.936 27.606 32.854 22.87C862.25 912.597 1002.667 728.747 1002.667 512c0-271.019-219.648-490.667-490.71-490.667z"></path></svg></a></div><!--]--><button type="button" class="vp-toggle-navbar-button" aria-label="Toggle Navbar" aria-expanded="false" aria-controls="nav-screen"><span><span class="vp-top"></span><span class="vp-middle"></span><span class="vp-bottom"></span></span></button></div></header><!----><!--]--><!----><div class="toggle-sidebar-wrapper"><span class="arrow start"></span></div><aside id="sidebar" class="vp-sidebar" vp-sidebar><!--[--><p class="vp-sidebar-header iotdb-sidebar-header"><span class="vp-sidebar-title"></span></p><!----><!--]--><ul class="vp-sidebar-links"></ul><!----></aside><!--[--><main id="main-content" class="vp-page"><!--[--><!----><!----><nav class="vp-breadcrumb disable"></nav><div class="vp-page-title"><h1><!---->JDBC</h1><div class="page-info"><!----><!----><span class="page-date-info" aria-label="写作日期📅" data-balloon-pos="up"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon" name="calendar"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span data-allow-mismatch="text">2023/7/10</span><meta property="datePublished" content="2023-07-10T03:11:17.000Z"></span><!----><span class="page-reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="up"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="timer icon" name="timer"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 4 分钟</span><meta property="timeRequired" content="PT4M"></span><!----><!----></div><hr></div><!----><div class="" vp-content><!----><div id="markdown-content"><h1 id="jdbc" tabindex="-1"><a class="header-anchor" href="#jdbc"><span>JDBC</span></a></h1><p><strong>注意</strong>: 目前的JDBC实现仅是为与第三方工具连接使用的。不推荐使用 JDBC （执行插入语句时），因无法提供高性能写入，查询推荐使用 JDBC。</p><p>对于Java应用，我们推荐使用<a class="route-link" href="/zh/UserGuide/dev-1.3/API/Programming-Java-Native-API.html">Java 原生接口</a>*</p><h2 id="依赖" tabindex="-1"><a class="header-anchor" href="#依赖"><span>依赖</span></a></h2><ul><li>JDK >= 1.8</li><li>Maven >= 3.6</li></ul><h2 id="安装方法" tabindex="-1"><a class="header-anchor" href="#安装方法"><span>安装方法</span></a></h2><p>在根目录下执行下面的命令：</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">mvn</span><span style="color:#98C379;"> clean</span><span style="color:#98C379;"> install</span><span style="color:#D19A66;"> -pl</span><span style="color:#98C379;"> iotdb-client/jdbc</span><span style="color:#D19A66;"> -am</span><span style="color:#D19A66;"> -DskipTests</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><h3 id="在-maven-中使用-iotdb-jdbc" tabindex="-1"><a class="header-anchor" href="#在-maven-中使用-iotdb-jdbc"><span>在 MAVEN 中使用 IoTDB JDBC</span></a></h3><div class="language-xml line-numbers-mode" data-highlighter="shiki" data-ext="xml" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-xml"><span class="line"><span style="color:#ABB2BF;"><</span><span style="color:#E06C75;">dependencies</span><span style="color:#ABB2BF;">></span></span> |
| <span class="line"><span style="color:#ABB2BF;"> <</span><span style="color:#E06C75;">dependency</span><span style="color:#ABB2BF;">></span></span> |
| <span class="line"><span style="color:#ABB2BF;"> <</span><span style="color:#E06C75;">groupId</span><span style="color:#ABB2BF;">>org.apache.iotdb</</span><span style="color:#E06C75;">groupId</span><span style="color:#ABB2BF;">></span></span> |
| <span class="line"><span style="color:#ABB2BF;"> <</span><span style="color:#E06C75;">artifactId</span><span style="color:#ABB2BF;">>iotdb-jdbc</</span><span style="color:#E06C75;">artifactId</span><span style="color:#ABB2BF;">></span></span> |
| <span class="line"><span style="color:#ABB2BF;"> <</span><span style="color:#E06C75;">version</span><span style="color:#ABB2BF;">>1.3.1</</span><span style="color:#E06C75;">version</span><span style="color:#ABB2BF;">></span></span> |
| <span class="line"><span style="color:#ABB2BF;"> </</span><span style="color:#E06C75;">dependency</span><span style="color:#ABB2BF;">></span></span> |
| <span class="line"><span style="color:#ABB2BF;"></</span><span style="color:#E06C75;">dependencies</span><span style="color:#ABB2BF;">></span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="示例代码" tabindex="-1"><a class="header-anchor" href="#示例代码"><span>示例代码</span></a></h3><p>本章提供了如何建立数据库连接、执行 SQL 和显示查询结果的示例。</p><p>要求您已经在工程中包含了数据库编程所需引入的包和 JDBC class.</p><p><strong>注意：为了更快地插入，建议使用 executeBatch()</strong></p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.sql.*</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.jdbc.IoTDBSQLException</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> class</span><span style="color:#E5C07B;"> JDBCExample</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> /**</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> * Before executing a SQL statement with a Statement object, you need to create a Statement object using the createStatement() method of the Connection object.</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> * After creating a Statement object, you can use its execute() method to execute a SQL statement</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> * Finally, remember to close the 'statement' and 'connection' objects by using their close() method</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> * For statements with query results, we can use the getResultSet() method of the Statement object to get the result set.</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> */</span></span> |
| <span class="line"><span style="color:#C678DD;"> public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> SQLException</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> Connection</span><span style="color:#E06C75;"> connection</span><span style="color:#56B6C2;"> =</span><span style="color:#61AFEF;"> getConnection</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> if</span><span style="color:#ABB2BF;"> (connection </span><span style="color:#56B6C2;">==</span><span style="color:#D19A66;"> null</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"get connection defeat"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> return</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#E5C07B;"> Statement</span><span style="color:#E06C75;"> statement</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> connection</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">createStatement</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Create database</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"CREATE DATABASE root.demo"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">IoTDBSQLException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">){</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getMessage</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //SHOW DATABASES</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SHOW DATABASES"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getResultSet</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Create time series</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Different data type has different encoding methods. Here use INT32 as an example</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"CREATE TIMESERIES root.demo.s0 WITH DATATYPE=INT32,ENCODING=RLE;"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">IoTDBSQLException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">){</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getMessage</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Show time series</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SHOW TIMESERIES root.demo"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getResultSet</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Show devices</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SHOW DEVICES"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getResultSet</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Count time series</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"COUNT TIMESERIES root"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getResultSet</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Count nodes at the given level</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"COUNT NODES root LEVEL=3"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getResultSet</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Count timeseries group by each node at the given level</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"COUNT TIMESERIES root GROUP BY LEVEL=3"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getResultSet</span><span style="color:#ABB2BF;">());</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> </span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Execute insert statements in batch</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addBatch</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"insert into root.demo(timestamp,s0) values(1,1);"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addBatch</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"insert into root.demo(timestamp,s0) values(2,15);"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addBatch</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"insert into root.demo(timestamp,s0) values(2,17);"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addBatch</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"insert into root.demo(timestamp,s0) values(4,12);"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeBatch</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">clearBatch</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Full query statement</span></span> |
| <span class="line"><span style="color:#E5C07B;"> String</span><span style="color:#E06C75;"> sql</span><span style="color:#56B6C2;"> =</span><span style="color:#98C379;"> "select * from root.demo"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#E5C07B;"> ResultSet</span><span style="color:#E06C75;"> resultSet</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQuery</span><span style="color:#ABB2BF;">(sql);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"sql: "</span><span style="color:#56B6C2;"> +</span><span style="color:#ABB2BF;"> sql);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(resultSet);</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Exact query statement</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> sql </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> "select s0 from root.demo where time = 4;"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> resultSet</span><span style="color:#56B6C2;">=</span><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQuery</span><span style="color:#ABB2BF;">(sql);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"sql: "</span><span style="color:#56B6C2;"> +</span><span style="color:#ABB2BF;"> sql);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(resultSet);</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Time range query</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> sql </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> "select s0 from root.demo where time >= 2 and time < 5;"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> resultSet </span><span style="color:#56B6C2;">=</span><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQuery</span><span style="color:#ABB2BF;">(sql);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"sql: "</span><span style="color:#56B6C2;"> +</span><span style="color:#ABB2BF;"> sql);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(resultSet);</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Aggregate query</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> sql </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> "select count(s0) from root.demo;"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> resultSet </span><span style="color:#56B6C2;">=</span><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQuery</span><span style="color:#ABB2BF;">(sql);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"sql: "</span><span style="color:#56B6C2;"> +</span><span style="color:#ABB2BF;"> sql);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(resultSet);</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //Delete time series</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"delete timeseries root.demo.s0"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> //close connection</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#E5C07B;"> connection</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> public</span><span style="color:#C678DD;"> static</span><span style="color:#E5C07B;"> Connection</span><span style="color:#61AFEF;"> getConnection</span><span style="color:#ABB2BF;">()</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> // JDBC driver name and database URL</span></span> |
| <span class="line"><span style="color:#E5C07B;"> String</span><span style="color:#E06C75;"> driver</span><span style="color:#56B6C2;"> =</span><span style="color:#98C379;"> "org.apache.iotdb.jdbc.IoTDBDriver"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#E5C07B;"> String</span><span style="color:#E06C75;"> url</span><span style="color:#56B6C2;"> =</span><span style="color:#98C379;"> "jdbc:iotdb://127.0.0.1:6667/"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> // set rpc compress mode</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> // String url = "jdbc:iotdb://127.0.0.1:6667?rpc_compress=true";</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> // Database credentials</span></span> |
| <span class="line"><span style="color:#E5C07B;"> String</span><span style="color:#E06C75;"> username</span><span style="color:#56B6C2;"> =</span><span style="color:#98C379;"> "root"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#E5C07B;"> String</span><span style="color:#E06C75;"> password</span><span style="color:#56B6C2;"> =</span><span style="color:#98C379;"> "root"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#E5C07B;"> Connection</span><span style="color:#E06C75;"> connection</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> null</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> Class</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">forName</span><span style="color:#ABB2BF;">(driver);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> connection </span><span style="color:#56B6C2;">=</span><span style="color:#E5C07B;"> DriverManager</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getConnection</span><span style="color:#ABB2BF;">(url, username, password);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">ClassNotFoundException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">printStackTrace</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">SQLException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">printStackTrace</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#C678DD;"> return</span><span style="color:#ABB2BF;"> connection;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> /**</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> * This is an example of outputting the results in the ResultSet</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> */</span></span> |
| <span class="line"><span style="color:#C678DD;"> private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">ResultSet</span><span style="color:#E06C75;font-style:italic;"> resultSet</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> SQLException</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#C678DD;"> if</span><span style="color:#ABB2BF;"> (resultSet </span><span style="color:#56B6C2;">!=</span><span style="color:#D19A66;"> null</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"--------------------------"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#E5C07B;"> ResultSetMetaData</span><span style="color:#E06C75;"> metaData</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getMetaData</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#C678DD;"> int</span><span style="color:#E06C75;"> columnCount</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> metaData</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnCount</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">int</span><span style="color:#E06C75;"> i</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">; i </span><span style="color:#56B6C2;"><</span><span style="color:#ABB2BF;"> columnCount; i++) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">print</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">metaData</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnLabel</span><span style="color:#ABB2BF;">(i </span><span style="color:#56B6C2;">+</span><span style="color:#D19A66;"> 1</span><span style="color:#ABB2BF;">) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> " "</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> while</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">int</span><span style="color:#E06C75;"> i</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 1</span><span style="color:#ABB2BF;">; ; i++) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">print</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getString</span><span style="color:#ABB2BF;">(i));</span></span> |
| <span class="line"><span style="color:#C678DD;"> if</span><span style="color:#ABB2BF;"> (i </span><span style="color:#56B6C2;"><</span><span style="color:#ABB2BF;"> columnCount) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">", "</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">else</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> break</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"--------------------------</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>可以在 url 中指定 version 参数：</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#E5C07B;">String</span><span style="color:#E06C75;"> url </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> "jdbc:iotdb://127.0.0.1:6667?version=V_1_0"</span><span style="color:#ABB2BF;">;</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><p>version 表示客户端使用的 SQL 语义版本，用于升级 0.13 时兼容 0.12 的 SQL 语义，可能取值有：<code>V_0_12</code>、<code>V_0_13</code>、<code>V_1_0</code>。</p><p>此外，IoTDB 在 JDBC 中提供了额外的接口，供用户在连接中使用不同的字符集（例如 GB18030）读写数据库。<br> IoTDB 默认的字符集为 UTF-8。当用户期望使用 UTF-8 外的字符集时，需要在 JDBC 的连接中，指定 charset 属性。例如：</p><ol><li>使用 GB18030 的 charset 创建连接：</li></ol><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#E5C07B;">DriverManager</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getConnection</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"jdbc:iotdb://127.0.0.1:6667?charset=GB18030"</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">)</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><ol start="2"><li>调用如下 <code>IoTDBStatement</code> 接口执行 SQL 时，可以接受 <code>byte[]</code> 编码的 SQL，该 SQL 将按照被指定的 charset 解析成字符串。</li></ol><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> boolean</span><span style="color:#61AFEF;"> execute</span><span style="color:#E06C75;">(</span><span style="color:#C678DD;">byte</span><span style="color:#E06C75;">[] sql) throws SQLException</span><span style="color:#ABB2BF;">;</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><ol start="3"><li>查询结果输出时，可使用 <code>ResultSet</code> 的 <code>getBytes</code> 方法得到的 <code>byte[]</code>，<code>byte[]</code> 的编码使用连接指定的 charset 进行。</li></ol><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#E5C07B;">System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">print</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getString</span><span style="color:#ABB2BF;">(i) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> " ("</span><span style="color:#56B6C2;"> +</span><span style="color:#C678DD;"> new</span><span style="color:#61AFEF;"> String</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getBytes</span><span style="color:#ABB2BF;">(i), charset) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> ")"</span><span style="color:#ABB2BF;">);</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><p>以下是完整示例:</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> class</span><span style="color:#E5C07B;"> JDBCCharsetExample</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> final</span><span style="color:#E5C07B;"> Logger</span><span style="color:#E06C75;"> LOGGER </span><span style="color:#56B6C2;">=</span><span style="color:#E5C07B;"> LoggerFactory</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getLogger</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">JDBCCharsetExample</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">class</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> Exception</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> Class</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">forName</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"org.apache.iotdb.jdbc.IoTDBDriver"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">final</span><span style="color:#E5C07B;"> Connection</span><span style="color:#E06C75;"> connection</span><span style="color:#56B6C2;"> =</span></span> |
| <span class="line"><span style="color:#E5C07B;"> DriverManager</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getConnection</span><span style="color:#ABB2BF;">(</span></span> |
| <span class="line"><span style="color:#98C379;"> "jdbc:iotdb://127.0.0.1:6667?charset=GB18030"</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#E5C07B;"> IoTDBStatement</span><span style="color:#E06C75;"> statement</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> (IoTDBStatement) </span><span style="color:#E5C07B;">connection</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">createStatement</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#E5C07B;"> String</span><span style="color:#E06C75;"> insertSQLWithGB18030</span><span style="color:#56B6C2;"> =</span></span> |
| <span class="line"><span style="color:#98C379;"> "insert into root.测试(timestamp, 维语, 彝语, 繁体, 蒙文, 简体, 标点符号, 藏语) values(1, 'ئۇيغۇر تىلى', 'ꆈꌠꉙ', </span><span style="color:#56B6C2;">\"</span><span style="color:#98C379;">繁體</span><span style="color:#56B6C2;">\"</span><span style="color:#98C379;">, 'ᠮᠣᠩᠭᠣᠯ ᠬᠡᠯᠡ', '简体', '——？！', </span><span style="color:#56B6C2;">\"</span><span style="color:#98C379;">བོད་སྐད།</span><span style="color:#56B6C2;">\"</span><span style="color:#98C379;">);"</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#C678DD;"> byte</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;">insertSQLWithGB18030Bytes</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> insertSQLWithGB18030</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getBytes</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"GB18030"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">execute</span><span style="color:#ABB2BF;">(insertSQLWithGB18030Bytes);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">IoTDBSQLException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> LOGGER</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">error</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"IoTDB Jdbc example error"</span><span style="color:#ABB2BF;">, e);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"GB18030"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"UTF-8"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"UTF-16"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"GBK"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"ISO-8859-1"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#E06C75;font-style:italic;"> charset</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> SQLException</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"[Charset: "</span><span style="color:#56B6C2;"> +</span><span style="color:#ABB2BF;"> charset </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> "]"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">final</span><span style="color:#E5C07B;"> Connection</span><span style="color:#E06C75;"> connection</span><span style="color:#56B6C2;"> =</span></span> |
| <span class="line"><span style="color:#E5C07B;"> DriverManager</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getConnection</span><span style="color:#ABB2BF;">(</span></span> |
| <span class="line"><span style="color:#98C379;"> "jdbc:iotdb://127.0.0.1:6667?charset="</span><span style="color:#56B6C2;"> +</span><span style="color:#ABB2BF;"> charset, </span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#E5C07B;"> IoTDBStatement</span><span style="color:#E06C75;"> statement</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> (IoTDBStatement) </span><span style="color:#E5C07B;">connection</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">createStatement</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">statement</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQuery</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"select ** from root"</span><span style="color:#ABB2BF;">), </span><span style="color:#E5C07B;">Charset</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">forName</span><span style="color:#ABB2BF;">(charset));</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">IoTDBSQLException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> LOGGER</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">error</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"IoTDB Jdbc example error"</span><span style="color:#ABB2BF;">, e);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> outputResult</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">ResultSet</span><span style="color:#E06C75;font-style:italic;"> resultSet</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">Charset</span><span style="color:#E06C75;font-style:italic;"> charset</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> SQLException</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#C678DD;"> if</span><span style="color:#ABB2BF;"> (resultSet </span><span style="color:#56B6C2;">!=</span><span style="color:#D19A66;"> null</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"--------------------------"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#E5C07B;"> ResultSetMetaData</span><span style="color:#E06C75;"> metaData</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getMetaData</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> final</span><span style="color:#C678DD;"> int</span><span style="color:#E06C75;"> columnCount</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> metaData</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnCount</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">int</span><span style="color:#E06C75;"> i</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">; i </span><span style="color:#56B6C2;"><</span><span style="color:#ABB2BF;"> columnCount; i++) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">print</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">metaData</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnLabel</span><span style="color:#ABB2BF;">(i </span><span style="color:#56B6C2;">+</span><span style="color:#D19A66;"> 1</span><span style="color:#ABB2BF;">) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> " "</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;"> while</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">int</span><span style="color:#E06C75;"> i</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 1</span><span style="color:#ABB2BF;">; ; i++) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">print</span><span style="color:#ABB2BF;">(</span></span> |
| <span class="line"><span style="color:#E5C07B;"> resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getString</span><span style="color:#ABB2BF;">(i) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> " ("</span><span style="color:#56B6C2;"> +</span><span style="color:#C678DD;"> new</span><span style="color:#61AFEF;"> String</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">resultSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getBytes</span><span style="color:#ABB2BF;">(i), charset) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> ")"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> if</span><span style="color:#ABB2BF;"> (i </span><span style="color:#56B6C2;"><</span><span style="color:#ABB2BF;"> columnCount) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">", "</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">else</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#C678DD;"> break</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"--------------------------</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!----><!----><!----></div><footer class="vp-page-meta"><div class="vp-meta-item edit-link"><a class="auto-link external-link vp-meta-label" href="https://github.com/apache/iotdb-docs/edit/main/src/zh/UserGuide/dev-1.3/API/Programming-JDBC.md" aria-label="发现错误？在 GitHub 上编辑此页" rel="noopener noreferrer" target="_blank"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon" name="edit"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->发现错误？在 GitHub 上编辑此页<!----></a></div><div class="vp-meta-item git-info"><div class="update-time"><span class="vp-meta-label">最近更新: </span><time class="vp-meta-info" datetime="2025-04-22T04:18:28.000Z" data-allow-mismatch>2025/4/22 04:18</time></div><!----></div></footer><!----><!----><!----><!--]--></main><!--]--><footer class="site-footer"><span id="doc-version" style="display:none;">dev-1.3</span><p class="copyright-text">版权所有 © 2026 Apache软件基金会。 |
| Apache IoTDB，IoTDB，Apache，Apache 羽毛标志和 Apache IoTDB 项目标志是 Apache 软件基金会在所有国家的注册商标或商标</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"><strong>有问题吗？</strong> 在 QQ、微信或 Slack 上联系我们。 <a href="https://github.com/apache/iotdb/issues/1995">立即加入社区</a></p></footer></div><!--]--><!--]--><!--[--><!----><!--]--><!--]--></div> |
| <script type="module" src="/assets/app-pmkzp6TS.js" defer></script> |
| </body> |
| </html> |
