逆向工程

创建一个普通的java类

导入三个jar包

在项目下创建一个generatorConfig.xml文件 里面内容如下

<?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="/Program Files/IBM/SQLLIB/java/db2java.zip" />-->

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/test"
                        userId="root"
                        password="ych521mm">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 生成实体类 -->
        <javaModelGenerator targetPackage="com.ujy.pojo" targetProject=".src">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成映射文件 -->
        <sqlMapGenerator targetPackage="com.ujy.mapper" targetProject=".src">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!-- 生成接口 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.ujy.mapper" targetProject=".src">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <table tableName="user" domainObjectName="User"/>
        <table tableName="person" domainObjectName="Person"/>
    </context>
</generatorConfiguration>

在建一个生成类 随意就行 

里面建造main方法

内容如下

public class Generator {
    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile = new File("generatorConfig.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);
    }
}

 测试即可直接生成