Chery Qi的博客

select id, name from t_keys where 1 = 1 <if test="keys != null"> <foreach collection="keys" item="key" open="AND (" close=")" separator="or" > name = #{key} </foreach> </if>

<update id="updateStatus" parameterMap="SystemUserNotice"> UPDATE <include refid="table" /> SET `status` = #{status},`edit_time`=#{editTime} WHERE `id` IN ( <foreac...

异常信息Caused by: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.......AllFieldsResultMap一般这种情况： 在两个或以上 mapper.xml文件中的namespace指定向同一个dao实现类(如图中OrderGoodsDa...

Mapper.xml文件：<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="co...