[mybatis]逆向工程MGB基本编写

Posted 2022-02-12 唐火

逆向工程

• 项目结构
  

• 依赖

<dependency>
     <groupId>org.mybatis.generator</groupId>
     <artifactId>mybatis-generator-core</artifactId>
     <version>1.3.7</version>
</dependency>

• mgb.xml

<?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>
    <!-- targetRuntime创建一个myBatis容器 有MyBatis3Simple（简单版的CURD）和MyBatis3带有动态sql   -->
    <context id="DB2Tables" targetRuntime="MyBatis3Simple">
        <!-- 指定如何连接目标数据库 -->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC"
                        userId="root"
                        password="8888.216">
        </jdbcConnection>
        <!-- 类型解析器 是否强制转换forceBigDecimals -->
        <javaTypeResolver >
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!--javaModelGenerator:指定javaBean的生产策略-->
        <!-- 定义java模型属性  形成javabean   targetPackage目标包-->
        <!--        targetProject 目标工程-->
        <javaModelGenerator targetPackage="com.atguigu.mybatis.bean" targetProject=".\\src">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- 定义sql映射  -->
        <!--sqlMapGenerator sql映射生产策略-->
        <sqlMapGenerator targetPackage="com.atguigu.mybatis.dao"
                         targetProject=".\\resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        <!-- javaClientGenerator 指定Mapper的接口所在的位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.atguigu.mybatis.dao"  targetProject=".\\src">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
        <!--table 指定逆向分析那些表,根据表创建javabean(Departmanet) -->
        <table tableName="tb1_dept" domainObjectName="Department"></table>
        <table tableName="tb1_employee" domainObjectName="Employee"></table>

    </context>
</generatorConfiguration>

• java

    @Test
    public void mybatisGeneratorTest() throws IOException, XMLParserException, InvalidConfigurationException, SQLException, InterruptedException 

        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;

        ConfigurationParser cp = new ConfigurationParser(warnings);
        Reader reader = Resources.getResourceAsReader("mgb.xml");
        Configuration config = cp.parseConfiguration(reader);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        myBatisGenerator.generate(null);