org.springframework.dao.InvalidDataAccessApiUsageException: The given object has a null identifi异常处理

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Stacktraces

org.springframework.dao.InvalidDataAccessApiUsageException: The given object has a null identifier: cn.pdy.ss.role.entity.Role; nested exception is org.hibernate.TransientObjectException: The given object has a null identifier: cn.pdy.ss.role.entity.Role

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