MyBatis——Generator(MBG)

MyBatis Generator(MBG)

作用：根据数据库表自动生成Bean对象、Java接口、以及SqlMapper.xml配置文件

1.搭建MBG项目

a)下载MBG核心包

b)创建Java项目

c)从官方文档获取配置表、示例代码

到MyBatis Generator 官方网站 https://www.mybatis.org/generator/configreference/xmlconfig.html​​

复制配置表  粘贴到自己创建的config.xml文件中 ​​​​​

d)导入依赖包

2.  MBG配置以及根据数据库表生成所需文件（Bean、Interface、Mapper.xml）：

配置文件：

<?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>

  <context id="MyGenerator" targetRuntime="MyBatis3">
  
  <!-- 此标签用于去掉注释 -->
  <commentGenerator>
  <property name="suppressllComments" value="true"/>
  <property name="suppressDate" value="true"/>
  </commentGenerator>
  
    <!-- 数据库连接信息 -->
    <jdbcConnection driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver"
        connectionURL="jdbc:sqlserver://127.0.0.1:1433;DatabaseName =WJYLTeachingWebsite"
        userId="sa"
        password="ROOT">
    </jdbcConnection>

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

    <!-- JavaBean配置 -->
    <javaModelGenerator targetPackage="com.lk.domian" targetProject="src">
      <property name="enableSubPackages" value="false" />
      <property name="trimStrings" value="true" />
    </javaModelGenerator>

    <!-- mapper.xml配置 -->
    <sqlMapGenerator targetPackage="mapper"  targetProject="src">
      <property name="enableSubPackages" value="false" />
    </sqlMapGenerator>

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

    <!-- 数据表 -->
    <table  tableName="t_stu" />

  </context>
</generatorConfiguration>

最后执行的Main方法：

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

运行结果：