第一种:
Dao层的方法
<span style="font-size:12px;">Public User selectUser(String name,String password);</span>
对应的Mapper.xm
<select id="selectUser" resultMap="BaseResultMap"> select * from user_user_t where user_name = #{} and user_password=#{} </select>
第二种:
该方法采用Map传多参数
Dao层的方法
<span style="font-size:12px;">Public User selectUser(Map paramMap);</span>
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 #{},#{}
</select>