TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

類型 異常報告

消息 Request processing failed; nested exception is 
org.mybatis.spring.MyBatisSystemException: nested exception is 
org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to 
be returned by selectOne(), but found: 2

描述

服務器遇到一個意外的情況，阻止它完成請求。

例外情況

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119

org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

因為查詢到兩條數據

原來的查詢語句

解決方法

添加查詢的用戶的id,會自動將多條數據的同一用戶封裝到一個對象中
將id查詢出來並映射到對象中