mybatis 逆向工程

逆向工程

导入Maven依赖

      <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!--log4j-->
        <!-- https://mvnrepository.com/artifact/log4j/log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!--逆向工程包-->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
        </dependency>
    </dependencies>

浏览官方

新建MBG.xml

http://mybatis.org/generator/configreference/xmlconfig.html
复制方框的代码，然后回到resources新建MBG.xml把代码复制进去

修改MBG.xml

  <?xml version="1.0" encoding="UTF-8"?>

<!-- Mysql数据库连接的信息：驱动类、连接地址、用户名、密码 -->
<context id="DB2Tables" targetRuntime="MyBatis3">

    <commentGenerator>
        <!-- 是否去除自动生成的注释 -->
        <property name="suppressAllComments" value="false"/>
    </commentGenerator>

    <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                    connectionURL="jdbc:mysql://localhost:3306/how2java"
                    userId="root"
                    password="123456">
    </jdbcConnection>
    <!-- 默认为false，把JDBC DECIMAL 和NUMERIC类型解析为Integer，为true时
    把JDBC DECIMAL 和NUMERIC类型解析为java.math.BigDecimal -->
    <javaTypeResolver >
        <property name="forceBigDecimals" value="false" />
    </javaTypeResolver>

    <!--java模型生成实体类-->
    <javaModelGenerator targetPackage="com.rzk.pojo" targetProject="src/main/java">
        <!-- enableSubPackages:是否让schema作为包的后缀 -->
        <property name="enableSubPackages" value="false" />
        <!-- 从数据库返回的值被清理前后的空格 -->
        <property name="trimStrings" value="true" />
    </javaModelGenerator>

    <!-- targetProject：mapper映射文件生成的位置 -->
    <sqlMapGenerator targetPackage="com.rzk.dao"  targetProject="src/main/resources">
        <!-- enableSubPackages:是否让schema作为包的后缀 -->
        <property name="enableSubPackages" value="true" />
    </sqlMapGenerator>

    <!-- targetProject：mapper接口生成的的位置 -->
    <javaClientGenerator type="XMLMAPPER" targetPackage="com.rzk.dao"  targetProject="src/main/java">
        <!-- enableSubPackages:是否让schema作为包的后缀 -->
        <property name="enableSubPackages" value="true" />
    </javaClientGenerator>

    <table schema="DB2ADMIN" tableName="class_tb" domainObjectName="class"/>
    <table schema="DB2ADMIN" tableName="role_tb" domainObjectName="role"/>
    <table schema="DB2ADMIN" tableName="user" domainObjectName="user"/>

</context>

配置运行

点进去

新建一个test类复制这段进去

运行