mybatis中：returned more than one row, where no more than one was expected.异常
参考文章：
（1）mybatis中：returned more than one row, where no more than one was expected.异常
（2）https://www.cnblogs.com/simpledev/p/4253906.html
备忘一下。
来源：oschina
链接：https://my.oschina.net/u/4438370/blog/4818679