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| <a class="edit-on-gh" href="https://github.com/apache/struts-site/edit/master/source/tag-developers/jsp.md" title="Edit this page on GitHub">Edit on GitHub</a> |
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| <h1 class="no_toc" id="jsp">JSP</h1> |
| |
| <ul id="markdown-toc"> |
| <li><a href="#getting-started" id="markdown-toc-getting-started">Getting Started</a></li> |
| <li><a href="#servlet--jsp-scoped-objects" id="markdown-toc-servlet--jsp-scoped-objects">Servlet / JSP Scoped Objects</a> <ul> |
| <li><a href="#application-scope-attribute" id="markdown-toc-application-scope-attribute">Application Scope Attribute</a></li> |
| <li><a href="#session-scope-attribute" id="markdown-toc-session-scope-attribute">Session Scope Attribute</a></li> |
| <li><a href="#request-scope-attribute" id="markdown-toc-request-scope-attribute">Request Scope Attribute</a></li> |
| <li><a href="#request-parameter" id="markdown-toc-request-parameter">Request Parameter</a></li> |
| <li><a href="#context-scope-parameter" id="markdown-toc-context-scope-parameter">Context Scope Parameter</a></li> |
| </ul> |
| </li> |
| <li><a href="#tag-support" id="markdown-toc-tag-support">Tag Support</a></li> |
| <li><a href="#exposing-the-valuestack" id="markdown-toc-exposing-the-valuestack">Exposing the ValueStack</a></li> |
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| |
| <p>The default configuration (<code class="highlighter-rouge">struts-default.xml</code>) configures the <code class="highlighter-rouge">Dispatcher Result</code> as the default result, which works |
| well with JavaServer Pages. Any JSP 1.2+ container can work with Struts 2 JSP tags immediately.</p> |
| |
| <h2 id="getting-started">Getting Started</h2> |
| |
| <p>Because JSP support occurs through the <code class="highlighter-rouge">Dispatcher Result</code>, which is the default result type, you don’t need to specify |
| the type attribute when configuring <code class="highlighter-rouge">struts.xml</code>:</p> |
| |
| <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt"><action</span> <span class="na">name=</span><span class="s">"test"</span> <span class="na">class=</span><span class="s">"com.acme.TestAction"</span><span class="nt">></span> |
| <span class="nt"><result</span> <span class="na">name=</span><span class="s">"success"</span><span class="nt">></span>test-success.jsp<span class="nt"></result></span> |
| <span class="nt"></action></span> |
| </code></pre></div></div> |
| |
| <p>Then in <strong>test-success.jsp</strong>:</p> |
| |
| <pre><code class="language-jsp"><%@ taglib prefix="s" uri="/struts-tags" %> |
| |
| <html> |
| <head> |
| <title>Hello</title> |
| </head> |
| <body> |
| |
| Hello, <s:property value="name"/> |
| |
| </body> |
| </html> |
| </code></pre> |
| |
| <p>Where <strong>name</strong> is a property on your action. That’s it!</p> |
| |
| <h2 id="servlet--jsp-scoped-objects">Servlet / JSP Scoped Objects</h2> |
| |
| <p>The following are ways to obtain Application scope attributes, Session scope attributes, Request scope attributes, |
| Request parameters and framework Context scope parameters:</p> |
| |
| <h3 id="application-scope-attribute">Application Scope Attribute</h3> |
| |
| <p>Assuming there’s an attribute with name <code class="highlighter-rouge">myApplicationAttribute</code> in the Application scope.</p> |
| |
| <pre><code class="language-jsp"><s:property value="%{#application.myApplicationAttribute}" /> |
| </code></pre> |
| |
| <h3 id="session-scope-attribute">Session Scope Attribute</h3> |
| |
| <p>Assuming there’s an attribute with name <code class="highlighter-rouge">mySessionAttribute</code> in the Session scope.</p> |
| |
| <pre><code class="language-jsp"><s:property value="%{#session.mySessionAttribute}" /> |
| </code></pre> |
| |
| <h3 id="request-scope-attribute">Request Scope Attribute</h3> |
| |
| <p>Assuming there’s an attribute with name <code class="highlighter-rouge">myRequestAttribute</code> in the Request scope.</p> |
| |
| <pre><code class="language-jsp"><s:property value="%{#request.myRequestAttribute}" /> |
| </code></pre> |
| |
| <h3 id="request-parameter">Request Parameter</h3> |
| |
| <p>Assuming there’s a request parameter <code class="highlighter-rouge">myParameter</code> (e.g. [http://host/myApp/myAction.action?myParameter=one]).</p> |
| |
| <pre><code class="language-jsp"><s:property value="%{#parameters.myParameter}" /> |
| </code></pre> |
| |
| <h3 id="context-scope-parameter">Context Scope Parameter</h3> |
| |
| <p>Assuming there’s a parameter with the name <code class="highlighter-rouge">myContextParam</code> in our context.</p> |
| |
| <pre><code class="language-jsp"><s:property value="%{#myContextParam}" /> |
| </code></pre> |
| |
| <h2 id="tag-support">Tag Support</h2> |
| |
| <p>See the <a href="jsp-tags.html">JSP Tags</a> documentation for information on how to use the generic <a href="struts-tags.html">Struts Tags</a> |
| provided by the framework.</p> |
| |
| <h2 id="exposing-the-valuestack">Exposing the ValueStack</h2> |
| |
| <p>There are a couple of ways to obtain <a href="access-to-valuestack-from-jsps.html">Access to ValueStack from JSPs</a>.</p> |
| |
| </section> |
| </article> |
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