MyBatis（四）多参数处理问题

这里总结了关于多参数传递时，MyBatis接收的三种方式。

（1）接口中编写方法

　　public Emp getEmpByParams(Integer id,String lastNmae);
    
    public Emp getEmpByParam(@Param("id")Integer id,@Param("lastName")String lastNmae);
    
    public Emp getEmpByParam(Map<String, Object> map);

（2）编写Mapper文件

　　<select id="getEmpByParams" resultType="com.eu.bean.Emp">
        select id,last_name lastName,gender geder,email from Emp where id = #{param1} and last_name= #{param2}
   </select>
　　<select id="getEmpByParam" resultType="com.eu.bean.Emp">
        select id,last_name lastName,gender geder,email from Emp where id = #{id} and last_name= #{lastName}
    </select>

 （3）编写测试

　　public SqlSessionFactory getSqlSessionFactory() throws IOException {
        String resource = "conf/mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        return new SqlSessionFactoryBuilder().build(inputStream);
    }
　　@Test
    public void testMapperPar() throws IOException {
        SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();
        //1.获取到sqlsession 不会自动提交数据
        SqlSession openSession = sqlSessionFactory.openSession();
        EmpDao mapper = openSession.getMapper(EmpDao.class);
        
        Emp emp = mapper.getEmpByParam(1, "张三");
        System.out.println(emp);
        
        //手动提交数据
        openSession.commit();
        openSession.close();
    }
    
    @Test
    public void testMapperMap() throws IOException {
        SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();
        //1.获取到sqlsession 不会自动提交数据
        SqlSession openSession = sqlSessionFactory.openSession();
        EmpDao mapper = openSession.getMapper(EmpDao.class);
        
        Map<String, Object> map=new HashMap<String, Object>();
        map.put("id", 1);
        map.put("lastName", "张三");
        Emp emp = mapper.getEmpByParam(map);
        System.out.println(emp);
        
        //手动提交数据
        openSession.commit();
        openSession.close();
    }