简单的理解，MyBatis逆向工程，就是通过相应插件，自动生成MyBatis数据库连接的一些文件。
mybatis需要编写sql语句，mybatis官方提供逆向工程，可以针对单表自动生成mybatis执行所需要的代码（mapper.java、mapper.xml、pojo…），提高工作效率。
目录结构
【使用步骤】
1.在pom.xml文件中添加坐标
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency> <!-- 数据库连接池 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.40</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
2.在项目上新建mbj.xml文件
<?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> <!--连接数据库--> <context id="DB2Tables" targetRuntime="MyBatis3"> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/project_crowd" userId="root" password="123456"> </jdbcConnection> <javaTypeResolver > <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!--实体类生成的位置--> <javaModelGenerator targetPackage="cn.kgc.crowd.entity" targetProject=".\src\main\java"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <!--映射的sql文件生成的位置--> <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!--mapper接口生成的位置--> <javaClientGenerator type="XMLMAPPER" targetPackage="cn.kgc.crowd.mapper" targetProject=".\src\main\java"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!--表和实体类生成的策略--> <table tableName="t_admin" domainObjectName="Admin" > </table> </context> </generatorConfiguration>
3.测试类
public class TestGenerator { public static void main(String[] args) throws Exception { List<String> warnings = new ArrayList<String>(); boolean overwrite = true; File configFile = new File("mbj.xml"); ConfigurationParser cp = new ConfigurationParser(warnings); Configuration config = cp.parseConfiguration(configFile); DefaultShellCallback callback = new DefaultShellCallback(overwrite); MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings); myBatisGenerator.generate(null); } }
mybatis地址：http://mybatis.org/generator/
原文：https://www.cnblogs.com/gnos/p/13454744.html