primitive quarrying methods

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attempted to return null from a method with a primitive ...

May 23, 2017· attempted to return null from a method with a primitive return type (double). double,mapper . xml,, null double,,0 .

MyBatis Mapper method 'xxx' attempted to return null from ...

Jun 28, 2021· :org.apache.ibatis.binding.BindingException: Mapper method 'com.dao.UserDao.getSum' attempted to return null from a method with a primitive return type (long).:1、sum()wherenull,resultType,。