MyBatis传参三种方式

MyBatis传参

1、直接传

Dao层的函数方法

Public User selectUser（String name，String area）;

对应的Mapper.xml

<select * from user where name =#{0} and area=#{1}> </select>

其中#{0} 代表第一个参数，#{1}代表第二个参数，依次类推

 

2、 采用Map传参数

Public User selectUser（Map paramMap）;

对应的Mapper.xml

<select * from user where name=#{userName,jdbcType=VARCHAR} and area=#{userArea,jdbcType=VARCHAR} </select>

 

Service 层调用

private User XXXSelectUser(){

Map paramMap=new hashMap();

paramMap.put("userName","对应的value");

paramMap.put("userArea","对应的value");

User user=xxx.selectUser(paramMap);

}

3、用内嵌变量

Dao层函数方法

Public User selectUser(@param("userName")String name,@param("userArea") String area);

对应的Mapper.xml

<select id=" selectUser" resultMap="BaseResultMap">

select * from user where name = #{userName，jdbcType=VARCHAR} and area=#{userArea,jdbcType=VARCHAR}

</select>

 

这种还是比较好的