identifier of an instance of com.xjgx.domain.education.PropagandaDatail was altered from 8a82a6ef74b
問題描述 jpa保存的時候報錯的 解決過程 期望:新增一條和PropagandaDatail除了id不一樣其他屬性，一模一樣的對象。 報錯代碼： 然後我又嘗試了一個copy對象的方法，新建了一個對象，還是不行 最後: 原因是當我查到這個PropagandaDatail對象的時候，我給他id質空了，因爲我想新增一條跟他一樣的，如果id不爲空的話，就會默認爲修改，改爲先copy完對象，然後再給對象id
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- 1. identifier of an instance of xx.entity was altered from xxKey@249e3cb2 to xxKey@74e8f4a3; nested exc
- 2. 【hibernate】錯誤：org.hibernate.HibernateException: identifier of an instance of com.agen.entity.Monthde...
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- 4. org.hibernate.HibernateException: identifier of an instance of 實體類的完整類路徑 was altered from X to X.
- 5. 【IllegalArgumentException】: object is not an instance of declaring class
- 6. Calling startActivity() from outside of an ~~~
- 7. Monitor類：Object synchronization method was called from an unsynchronized block of code.
- 8. terminate called after throwing an instance of 'std::bad_alloc'
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