在使用Hibernate save()方法的时候 报错: org.hibernate.exception.ConstraintViolationException:could not perform
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org.hibernate.exception.ConstraintViolationException:could not perform addBath
错误可能原因:实体属性的值与数据库字段类型相悖(如:数据库中不允许为null,单数传值为null)
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