backend/doc/note.md

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    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# Controller格式

```java
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.xxx;

import org.apache.iotdb.xxx;
import org.apache.iotdb.rpc.xxx;
import org.apache.iotdb.service.rpc.xxx;

import org.apache.thrift.xxx;

import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.math.MathContext;
import java.net.URL;
import java.sql.Array;
import java.sql.Blob;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Statement;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.List;
import java.util.Map;
```

排列整齐 不同层级之间用空格分开

## 注释

注释使用英文注释