解决myBatis generator逆向生成没有根据主键的select,update和delete问题

<?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="DB2Tables" targetRuntime="MyBatis3">
    <!-- 是否生成注释 -->
    <commentGenerator>
      <property name="suppressAllComments" value="true" />
    </commentGenerator>
    <!-- 配置数据库连接信息 -->
    <jdbcConnection driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://localhost:3306/ssm_crud?serverTimezone=UTC"
            userId="root"
            password="root">
      <!--<property name="useInformationSchema" value="true"/>-->
    </jdbcConnection>
 
    <javaTypeResolver >
      <property name="forceBigDecimals" value="false" />
    </javaTypeResolver>
    <!-- 指定javaBean生成的位置 -->
    <javaModelGenerator targetPackage="com.atguigu.crud.bean" targetProject=".\src\main\java">
      <property name="enableSubPackages" value="true" />
      <property name="trimStrings" value="true" />
    </javaModelGenerator>
    <!-- 指定sql映射文件生成的位置 -->
    <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
      <property name="enableSubPackages" value="true" />
    </sqlMapGenerator>
    <!-- 指定dao接口生成位置，mapper接口 -->
    <javaClientGenerator type="XMLMAPPER" targetPackage="com.atguigu.crud.dao" targetProject=".\src\main\java">
      <property name="enableSubPackages" value="true" />
    </javaClientGenerator>
    <!-- table指定每个表的生成策略 -->
    <table tableName="tbl_emp" domainObjectName="Employee" />
    <table tableName="tbl_dept" domainObjectName="Department" />
  </context>
</generatorConfiguration>

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