【解决Hibernate异常 identifier of an instance of xxx(实体类) was altered from xxx to xxxPK】

org.hibernate.HibernateException:identifier of an instance of xxx(实体类) was altered from xxx to xxxPK

检查Project类的主键属性是否是封装类型。例如：Integer，Long ……。不能是int，long等数据类型。

若Dao层调用 Hibernate框架的 saveOrupdate()函数报错，若实体类有多个主键，并且改变了主键，此时不可使用updateEntity()，需先delete表中旧数据再直接saveEntity()新数据。
此时若只改变了非主键，进行 delete、save也可能报错，这时可直接使用updateEntity()

//dao层//addpublic Project addholiday(Project p){return this.saveEntity(p);}//update （只改变来了非主键）public void updateHoliday(Project p){this.updateEntity(p);}//deletepublic int delholiday(Project p){/* 你自己的实体类String hql = "DELETE FROM ActHolidayshiftday " +" WHERE year = '" + holiday.getYear() + "' " +" and month = '" + holiday.getMonth() + "' " +" and day = '" + holiday.getDay() + "' " +" and holidayName ='" + holiday.getHolidayName() + "'";*/return this.getHibernateTemplate().bulkUpdate(hql);}//edit （实体类有多主键，改变了主键）public void editHoliday(Project oldp, Project newp){this.delholiday(oldp);this.saveEntity(newp);}

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【解决Hibernate异常 identifier of an instance of xxx(实体类) was altered from xxx to xxxPK】

org.hibernate.HibernateException:identifier of an instance of xxx(实体类) was altered from xxx to xxxPK

【解决Hibernate异常 identifier of an instance of xxx(实体类) was altered from xxx to xxxPK】相关推荐

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