AquerywasrunandnoResultMapswerefoundfortheMappedStatement

Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.shadow.foretaste.UserInfoDao.getPhoneNum'.  It's likely that neither a Result Type nor a Result Map was specified.

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导致这个错误的原因是:

mapper.xml中没有指定返回值类型

        select phone_num from user_info where id = #{id}

修改后:

        select phone_num  from user_info where id = #{id}

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