mybatis之接口方法多参数的三种实现方式

关键代码举例：

DaoMapper.xml

     <!-- 传入多个参数时，自动转换为map形式 -->
     <insert id="insertByColumns" useGeneratedKeys="true" keyProperty="id">
         insert into user (id, name, age) values (NULL ,#{param1}, #{param2})
     </insert>
     <insert id="insertByZhuJie" useGeneratedKeys="true" keyProperty="id">
         insert into user (id, name, age) values (NULL ,#{name}, #{age})
     </insert>
     <insert id="insertByMap" useGeneratedKeys="true" keyProperty="id">
         insert into user (id, name, age) values (NULL ,#{name}, #{age})
     </insert>

UserDao.java

     // 插入数据；多参数三种方式：默认Map、使用Map传参和使用注解别名
     public int insertByColumns(String name, int age);
     public int insertByZhuJie(@Param("name") String name, @Param("age") int age);
     public int insertByMap(Map map);

TestDao.java

     //   多参数插入数据的三种方式
     @Test
     public void testInsertByColumns() {
         UserDao userDao = session.getMapper(UserDao.class);
         String name = "insertByColumns";
         int age = 33;
 //        int n = userDao.insertByColumns(name, age);
 //        int n = userDao.insertByZhuJie(name, age);
 
         Map map = new HashMap();
         map.put("name", name);
         map.put("age", age);
         int n = userDao.insertByMap(map);
 
         session.commit();
         System.out.println("插入数据name：" + name);
         System.out.println(n);
     }