Expected one result (or null) to be returned by selectOne(), but found: 6] with root cause

一、报错信息

Expected one result (or null) to be returned by selectOne(), but found: 6] with root cause

二、出现原因

在做后台分页的查询中，写错了查询sql，导致返回值多了，正确的结果应是一条，

三解决方法

重写sql，selcet count（*） from dept_inf.

真是太粗心大意了。