Mybatis传值三种方法

一、参数索引方式

Dao层

Public User selectUser(String name,String area);

对应XML文件

<select id="selectUser" resultMap="BaseResultMap">
    select  *  from user_user_t   where user_name = #{0} and user_area=#{1}
</select>

二、使用Map传递多参数

Dao层

Public User selectUser(Map paramMap);

对应xml文件

<select id=" selectUser" resultMap="BaseResultMap">
   select  *  from user_user_t   where user_name = #{userName，jdbcType=VARCHAR} and user_area=#{userArea,jdbcType=VARCHAR}
</select>

Service层调用

Private User xxxSelectUser(){
Map paramMap=new hashMap();
paramMap.put(“userName”,”对应具体的参数值”);
paramMap.put(“userArea”,”对应具体的参数值”);
User user=xxx. selectUser(paramMap);}

三、注解

Dao层

Public User selectUser(@param(“userName”)Stringname,@param(“userArea”)String area);

对应XML文件

<select id=" selectUser" resultMap="BaseResultMap">
   select  *  from user_user_t   where user_name = #{userName，jdbcType=VARCHAR} and user_area=#{userArea,jdbcType=VARCHAR}
</select>