标签:param blank ring mybatis 技术分享 shm tle char password
第一种:
Dao层的方法
Public User selectUser(String name,String password);
对应的Mapper.xm
<select id="selectUser" resultMap="BaseResultMap">  
    select  *  from user_user_t   where user_name = #{0} and user_password=#{1}  
  </select>  
第二种:
该方法采用Map传多参数
Dao层的方法
Public User selectUser(Map paramMap);
对应的Mapper.xml
 <select id=" selectUser" resultMap="BaseResultMap">  
  select  *  from user_user_t   where user_name = #{userName,jdbcType=VARCHAR} and user_password=#{userPassword,jdbcType=VARCHAR}  
 </select>
Service层调用
public User xxxSelectUser(){  
Map paramMap=new hashMap();  
paramMap.put(“userName”,”对应具体的参数值”);  
paramMap.put(“userPassword”,”对应具体的参数值”);  
User user=xxx. selectUser(paramMap);} 
个人认为此方法不够直观,见到接口方法不能直接的知道要传的参数是什么。
第三种:
Dao层的方法
Public User selectUser(@param(“userName”)Stringname,@param(“userpassword”)String password);
对应的Mapper.xml
<select id=" selectUser" resultMap="BaseResultMap">  
   select  *  from user_user_t   where user_name = #{userName,jdbcType=VARCHAR} and user_password=#{userPassword,jdbcType=VARCHAR} 
</select>
第四种:
mapper.Java:
public List<User> getUserByParam(User use);
对应Mapper.xml:
<select id="getUserByParam" resultType="com.ray.bean.User" parameterType="com.ray.bean.User" > 
    select * from t_pub_user t 
     <where>
        <if test="{user_name}!=null">
             t.user_name like CONCAT(‘%‘,#{user_name},‘%‘)
        </if>
        <if test="{user_password}!=null">
            and t.user_password like CONCAT(‘%‘,#{user_password},‘%‘)
        </if>
    </where>
     limit #{1},#{2} 
</select>
标签:param blank ring mybatis 技术分享 shm tle char password
原文地址:http://www.cnblogs.com/flynnsky/p/7395343.html