A query is run and no Result Maps were found for the Mapped Statement

Cause:org.apache.ibatis.executor.executorexception:a query was run and no Result Maps were found for the Mapped statemen  T ' Com.shadow.foretaste.UserInfoDao.getPhoneNum '. It's likely that neither a result Type nor a result Map is specified.

The cause of this error is:

No return value type specified in Mapper.xml

<select id= "Getphonenum" > select Phone_num from user_info where id = #{id}</select>

After modification:

<select id= "Getphonenum" resulttype= "String" > select Phone_num from user_info where id = #{id}</select> ;

This article is from the "History of Data Mining Engineers" blog, be sure to keep this source http://qianqiansun.blog.51cto.com/13271301/1965502

A query is run and no Result Maps were found for the Mapped Statement