identifier of an instance of com.you.hibernate.model.TStudentInfo was altered from 6 to 7

来源：互联网发布：python 2.x.msi 编辑：程序博客网时间：2024/05/21 08:54

1、错误描述

Exception in thread "main" org.hibernate.HibernateException: identifier of an instance of com.you.hibernate.model.TStudentInfo was altered from 6 to 7at org.hibernate.event.internal.DefaultFlushEntityEventListener.checkId(DefaultFlushEntityEventListener.java:82)at org.hibernate.event.internal.DefaultFlushEntityEventListener.getValues(DefaultFlushEntityEventListener.java:194)at org.hibernate.event.internal.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:156)at org.hibernate.event.internal.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:225)at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99)at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1214)at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:403)at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)at com.you.hibernate.dao.StudentDao.saveStuInfo(StudentDao.java:73)at com.you.hibernate.dao.StudentDao.main(StudentDao.java:107)

2、错误原因

利用Hibernate批量添加，传入实体类参数，这里是用for循环进行批量添加；每循环一次，需要重新实例化实体类，但是却将实体类实例化放在循环外面

public static void main(String[] args) {               TStudentInfo student = new TStudentInfo();for(int i=10001;i<=100000;i++){student.setId(i);student.setStuNo(i);student.setStuName("胡思思"+i);student.setStuAge(20);if(i%2==1){student.setStuSex("女");}else{student.setStuSex("男");}student.setStuQq(""+i+"45744");student.setStuAddr("湖南省长沙市");saveStuInfo(student);}}

3、解决办法

public static void main(String[] args) {for(int i=10001;i<=100000;i++){TStudentInfo student = new TStudentInfo();student.setId(i);student.setStuNo(i);student.setStuName("胡思思"+i);student.setStuAge(20);if(i%2==1){student.setStuSex("女");}else{student.setStuSex("男");}student.setStuQq(""+i+"45744");student.setStuAddr("湖南省长沙市");saveStuInfo(student);}}

1 0