Mybatis基本类型参数非空判断(异常:There is no getter for property...)

先看一小段代码

<select id="queryByPhone" parameterType="java.lang.String" resultType="com.ccnc.bean.user.QuickUser">  
    select   
     *  
    from  quick_user where   
    <if test="phone != null" >  
       and phone = #{phone}  
    </if>  
  </select>

粗看并没有什么问题,执行会报There is no getter for property phone ......

原因是mybatis在对<if>解析时,会去parameterType指定的对象里获取相应属性,如果指定的对象是复杂对象,运行正常。这里是基本类型String,就会去String类找phone的get和set方法,所以报错。

正确代码,去掉parameterType,同时在对应的dao加入@Praram注解

<select id="queryByPhone"  resultType="com.ccnc.bean.user.QuickUser">  
    select   
     *  
    from  quick_user where   
    <if test="phone != null" >  
       and phone = #{phone}  
    </if>  
  </select>
public interface quickUserDao{

QuickUser queryByPhone(@Praram("phone") String phone);
}

 

posted @ 2019-12-05 11:07  自习小夫子  阅读(...)  评论(...编辑  收藏