1、IDEA创建maven工程，工程图如下
2、 在maven项目的pom.xml 添加mybatis-generator-maven-plugin 插件和MySQL数据库驱动依赖
<build>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.5</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>3、在maven项目下的src/main/resources 目录下建立名为 generatorConfig.xml的配置文件，作为mybatis-generator-maven-plugin 插件的执行目标，模板如下：
<?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>
<classPathEntry location="D:\\my_local_repository\\mysql\\mysql-connector-java\\5.1.34\\mysql-connector-java-5.1.34.jar"/>
<context id="mysqltables" targetRuntime="MyBatis3" defaultModelType="conditional">
<commentGenerator>
<property name="suppressDate" value="true"/>
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1:3306/mybatis" userId="root" password="root">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<javaModelGenerator targetPackage="main.java.com.edwin.model" targetProject="src">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<sqlMapGenerator targetPackage="main.java.com.edwin.mapping" targetProject="src">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<javaClientGenerator type="XMLMAPPER" targetPackage="main.java.com.edwin.dao" targetProject="src">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<table tableName="student" domainObjectName="Student" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
<table tableName="clazz" domainObjectName="Clazz" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
</context>
</generatorConfiguration>
4、使用maven运行mybatis-generator-maven-plugin插件：工程名->Plugins->mybatis-generator->mybatis-generator:generate->Run Maven Build 
5、自动生成的结构如下： 