[Solved] Mybatis crud insert error: org.apache.ibatis.binding.BindingException: Mapper method ‘com.liang.dao.UserMapper.addUser…

mybatis crud, insert error: org.apache.ibatis.binding.BindingException: Mapper method ‘com.liang.dao.UserMapper.addUser attempted to return null from a method with a primitive return type (int).


select—>insert
Successful insertion


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