在pom.xml 新加

<plugin>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.3.2</version>
    <configuration>
        <configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile>
        <verbose>true
 
</verbose>
        <overwrite>true</overwrite>
    </configuration>
</plugin>

generatorConfig.xml 配置：

<?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="C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.39\mysql-connector-java-5.1.39.jar" />

	<context id="context1" targetRuntime="MyBatis3">
		<jdbcConnection driverClass="com.mysql.jdbc.Driver"
			connectionURL="jdbc:mysql://127.0.0.1:3306/test" userId="root"
			password="huhanbo">
		</jdbcConnection>

		<!-- <javaTypeResolver> -->
		<!-- <property name="forceBigDecimals" value="false" /> -->
<!-- 	</javaTypeResolver> -->
		<!-- 實體定義地址 -->
		<javaModelGenerator targetPackage="com.me.mybatis.entity"
			targetProject="D:\Busys_Project\project\test\test\src\main\java" />
		<!-- sql的配置文件定義 -->
		<sqlMapGenerator targetPackage="mybatisMapper"
			targetProject="D:\Busys_Project\project\test\test\src\main\resources" />
		<!-- DAO定義 XMLMAPPER是xml的配置方式，還有ANNOTabelMapper的是註解方式 -->
		<javaClientGenerator targetPackage="com.me.mybatis.persistence"
			targetProject="D:\Busys_Project\project\test\test\src\main\java" type="XMLMAPPER" />

		<table tableName="company" domainObjectName="Company" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
	
	</context>
</generatorConfiguration>

配置好後，點擊如下，就會在上面配置的對應目錄生成

參考博客:

http://www.cnblogs.com/yjmyzz/p/mybatis-generator-tutorial.html

mybatis自動generator