我有一个文件（这个文件实际上有制表符分隔的值），必须写入其中一个数据库表。该文件也可以包含重复的条目。我正在处理文件中的 5000 条记录，所以我首先解析文件中的前 5000 条记录，如果它们包含任何重复的条目我只是忽略重复项并将其中的唯一记录写入数据库，然后再次处理下一个 5000以类似的方式记录，直到达到 EOF。现在，在编写这 5000 条记录时，5000 条记录的集合之间可能存在重复，如果发生这种情况（然后数据库抛出 DomainObjectExistsException），那么我会捕获异常并简单地更新记录。我正在执行这样的更新操作：
getHibernateTemplate().saveOrUpdate(femtoFactoryData);
其中 femtoFactoryData 是一个 java Object(POJO)，必须将其写入由文件中的制表符分隔值构造的数据库表中。表的主键只不过是 Femto 的 ID 和状态（临时/永久）。
但是在执行此更新操作时，我得到：
org.hibernate.exception.ConstraintViolationException
这是我的程序的堆栈跟踪：
org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at com.airvana.anp.model.db.impl.DbManagerGlobalUtils.convertException(DbManagerGlobalUtils.java:68)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImplHelper.updateFemtoFactoryData(FemtoFactoryDataDAOImplHelper.java:302)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImpl.updateFemtoFactoryData(FemtoFactoryDataDAOImpl.java:149)
at com.airvana.anp.model.oss.imports.common.DataRecordDAOHelperImpl.updateRecord(DataRecordDAOHelperImpl.java:725)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
at $Proxy89.updateRecord(Unknown Source)
at com.airvana.anp.model.oss.imports.parser.ParseControllerImpl.saveDupFactoryRecordsInDb(ParseControllerImpl.java:477)
at com.airvana.anp.model.oss.imports.parser.ParseControllerImpl.parseFile(ParseControllerImpl.java:111)
at com.airvana.anp.model.oss.imports.FactoryOperationsManagerImpl.onAllocation(FactoryOperationsManagerImpl.java:192)
at com.airvana.anp.model.resource.impl.CallbackWorkerJob.run(CallbackWorkerJob.java:43)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
Caused by: org.springframework.dao.DataIntegrityViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]; nested exception is org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:624)
at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:424)
at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
at org.springframework.orm.hibernate3.HibernateTemplate.merge(HibernateTemplate.java:820)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImplHelper.updateFemtoFactoryData(FemtoFactoryDataDAOImplHelper.java:299)
... 16 more
Caused by: org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2272)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2665)
at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:56)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1004)
at org.springframework.orm.hibernate3.HibernateAccessor.flushIfNecessary(HibernateAccessor.java:390)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:420)
... 19 more
Caused by: java.sql.SQLException: ORA-00001: unique constraint (ANPDB.SYS_C008651) violated
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:955)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1168)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3316)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3400)
at weblogic.jdbc.wrapper.PreparedStatement.executeUpdate(PreparedStatement.java:128)
at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:23)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2252)
... 29 more