Mybatis-Generator逆向工程,简单策略

1.下载generator包

https://github.com/mybatis/generator/releases

mybatis-generator-core-1.3.6.zip

官网下载即可

2.编写generator运行的xml文件

只做了简单的基本配置,如果需要更加复杂的配置,请参阅官方文档

http://www.mybatis.org/generator/configreference/context.html

注意:这个xml文件放在工程目录下面

每个标签的含义都写了注释

<?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>

    <!-- 这个配置文档可以参考官网:http://www.mybatis.org/generator/configreference/context.html -->

    <!-- 引入zip包,我们用解压后的jar包,故舍弃这种方式 -->
    <!-- <classPathEntry location="/Program Files/IBM/SQLLIB/java/db2java.zip" /> -->

    <!-- 
        context:指定generator运行环境
        targetRuntime
            -MyBatis3:复杂版的mapper
            -MyBatis3Simple:简单版的mapper
     -->
    <context id="DB2Tables" targetRuntime="MyBatis3Simple">
        <!-- 数据库连接 -->
        <jdbcConnection 
            driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://localhost:3306/beijing" 
            userId="root" 
            password="root">
        </jdbcConnection>

        <!-- 类型解析器,可以注掉(默认) -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- javaBean的生成策略 
            targetPackage:javaBean的生成路径
            targetProject:目标工程
        -->
        <javaModelGenerator 
            targetPackage="com.Entity"
            targetProject=".src">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- mapper映射文件生成地址 
            targetPackage:mapper的生成路径
        -->
        <sqlMapGenerator 
            targetPackage="com.dao"
            targetProject=".src">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        
        <!-- javaClientGenerator:客户端代码生成器位置,指定mapper接口所在位置 -->
        <javaClientGenerator 
            type="XMLMAPPER"
            targetPackage="com.dao" 
            targetProject=".src">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!-- 指定数据库中的表
            简单的配置一下
            - tableName:表名
            - domainObjectName:生成的Bean类名
            - 可以有多个table
         -->
        <table tableName="members" domainObjectName="Members"/>
        <!-- <table tableName="books" domainObjectName="Books"/> -->
    </context>
</generatorConfiguration>

3.生成代码

下面代码官方文档都有

贴出地址

http://www.mybatis.org/generator/running/runningWithJava.html

    // 逆向工程自动生成
    public static void generatorAuto() 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);
    }

4.工程目录结构

5.测试结果

    public static void main(String[] args) throws Exception {
        
        SqlSession session = getSqlSession();
        try {
            // 面向接口方式
            MembersMapper mapper = session.getMapper(MembersMapper.class);
            // 测试返回list集合
            List<Members> list = mapper.selectAll();
            for (Members member : list) {
                System.out.println(member);
            }
        } finally {
            // 关闭session
            session.close();
        }
//        generatorAuto();

    }

Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@224aed64]
==>  Preparing: select id, member_name, age, gender, email from members 
==> Parameters: 
<==    Columns: id, member_name, age, gender, email
<==        Row: 1, jack, 25, 1, jack@beijing.com
<==        Row: 2, pnoy, 26, 0, pnoy@beijing.com
<==      Total: 2
com.Entity.Members@7ac7a4e4
com.Entity.Members@6d78f375

ok,success~