MyBatis多参数处理问题

Posted 2021-02-16 司徒二条

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

1 　　public Emp getEmpByParams(Integer id,String lastNmae);
2     
3     public Emp getEmpByParam(@Param("id")Integer id,@Param("lastName")String lastNmae);
4     
5     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

 1 　　public SqlSessionFactory getSqlSessionFactory() throws IOException {
 2         String resource = "conf/mybatis-config.xml";
 3         InputStream inputStream = Resources.getResourceAsStream(resource);
 4         return new SqlSessionFactoryBuilder().build(inputStream);
 5     }
 6 　　@Test
 7     public void testMapperPar() throws IOException {
 8         SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();
 9         //1.获取到sqlsession 不会自动提交数据
10         SqlSession openSession = sqlSessionFactory.openSession();
11         EmpDao mapper = openSession.getMapper(EmpDao.class);
12         
13         Emp emp = mapper.getEmpByParam(1, "张三");
14         System.out.println(emp);
15         
16         //手动提交数据
17         openSession.commit();
18         openSession.close();
19     }
20     
21     @Test
22     public void testMapperMap() throws IOException {
23         SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();
24         //1.获取到sqlsession 不会自动提交数据
25         SqlSession openSession = sqlSessionFactory.openSession();
26         EmpDao mapper = openSession.getMapper(EmpDao.class);
27         
28         Map<String, Object> map=new HashMap<String, Object>();
29         map.put("id", 1);
30         map.put("lastName", "张三");
31         Emp emp = mapper.getEmpByParam(map);
32         System.out.println(emp);
33         
34         //手动提交数据
35         openSession.commit();
36         openSession.close();
37     }