在工作中遇到mybatis中判断两个集合是否为空,不为空的话遍历;都为空执行 1=0 or 1=0,则查询出来空集合 select login,name,email from users u where <choose> <when test="sameEmailList != null and sameEmailList.size > 0 "> email in <foreach collection="sameEmailList" item="email" open="(" separator="," close=")"> #{email, jdbcType=VARCHAR} </foreach> </when> <otherwise> 1 = 0 </otherwise> </choose> <choose> <when test="sameNameList != null and sameNameList.size > 0"> or name in <foreach collection="sameNameList" item="name" open="(" separator="," close=")"> #{name, jdbcType=VARCHAR} </foreach> </when> <otherwise> or 1 = 0 </otherwise> </choose> ORDER by name, email ASC
mybatis中判断两个集合是否为空
最新推荐文章于 2025-06-08 23:08:17 发布