（开发笔记）转载：eclipse maven 插件 自动生成mybatis dao、mapper

转载自：http://my.oschina.net/u/1998885/blog/552667

摘要
generator.xml 生成mybatis代码的核心配置文件

1、首先，用eclipse创建一个maven项目。

2、其次，在pom文件下，加入如下插件配置：

  pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.liyi.test</groupId>
  <artifactId>hello-mybatis</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>hello-mybatis Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
    <finalName>hello-mybatis</finalName>
      <pluginManagement>  
         <plugins>   
           <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.2</version>
            <configuration>
                <configurationFile>src/main/resources/mybatis-generator/generator.xml</configurationFile>
                <verbose>true</verbose>
                <overwrite>true</overwrite>
             </configuration>
             <executions>
                <execution>
                    <id>Generate MyBatis Artifacts</id>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                </execution>
             </executions>
             <dependencies>
                <dependency>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-core</artifactId>
                    <version>1.3.2</version>
                </dependency>
             </dependencies>
            </plugin>
        </plugins>  
       </pluginManagement>   
  </build>
</project>

 3、从pom.xml中找到configurationFile标签，按照标签上的路径放入一下生成代码的核心配置文件，generator.xml：

        

<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
 <generatorConfiguration>
     <!-- 数据库驱动包位置 -->
     <classPathEntry location="C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.21\mysql-connector-java-5.1.21.jar" /> 
     <!-- <classPathEntry location="C:\oracle\product\10.2.0\db_1\jdbc\lib\ojdbc14.jar" />-->
     <context id="DB2Tables" targetRuntime="MyBatis3">
         <commentGenerator>
             <property name="suppressAllComments" value="true" />
         </commentGenerator>
         <!-- 数据库链接URL、用户名、密码 -->
          <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/test" userId="root" password="1234"> 
         <!--<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@localhost:1521:orcl" userId="msa" password="msa">-->
         </jdbcConnection>
         <javaTypeResolver>
             <property name="forceBigDecimals" value="false" />
         </javaTypeResolver>
         <!-- 生成实体类的包名和位置，这里配置将生成的实体类放在com.liyi.test.domain这个包下 -->
         <javaModelGenerator targetPackage="com.liyi.test.domain" targetProject="M:\workspace\hello-mybatis\src\main\java\">
                                                                                 
             <property name="enableSubPackages" value="true" />
             <property name="trimStrings" value="true" />
         </javaModelGenerator>
         <!-- 生成的SQL映射文件包名和位置，这里配置将生成的SQL映射文件放在com.liyi.test.mapping这个包下 -->
         <sqlMapGenerator targetPackage="com.liyi.test.mapping" targetProject="M:\workspace\hello-mybatis\src\main\java\">
             <property name="enableSubPackages" value="true" />
         </sqlMapGenerator>
         <!-- 生成DAO的包名和位置，这里配置将生成的dao类放在com.liyi.test.mapping这个包下 -->
         <javaClientGenerator type="XMLMAPPER" targetPackage="com.liyi.test.dao" targetProject="M:\workspace\hello-mybatis\src\main\java\">
             <property name="enableSubPackages" value="true" />
         </javaClientGenerator>
         <!-- 要生成那些表(更改tableName和domainObjectName就可以) -->
         <table tableName="tab_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
     </context>
</generatorConfiguration>

4、cmd打开dos窗口，到项目的根路径，比如我的

      M：

      cd workspace/hello-mybatis/

       执行mvn mybatis-generator:generate(前提是你的电脑配置了maven的环境变量，可以用mvn命令)

        刷新项目就有以下效果了。