Hibernate使用constraintviolationexception进行批量更新

本文介绍了Hibernate使用constraintviolationexception进行批量更新的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我批量更新大量对象，想要忽略任何重复的对象。 这是什么最好的方法？

我的理解是，如果抛出 ConstrainViolationException ，批次中的所有其他对象将 / strong>。

解决方案

p $ p> private void saveBatch（）{ StatelessSession session = sessionFactory.openStatelessSession（）; 事务tx = session.beginTransaction（）; try { for（Object t：batchList）{ session.insert（t）; } txmit（）; } catch（ConstraintViolationException e）{ log.info（批量复制...单独保存）; tx.rollback（）; session.close（）; saveIndividually（）; return; } session.close（）; batchList.clear（）; } private void saveIndividually（）{ StatelessSession session = sessionFactory.openStatelessSession（）; for（Object t：batchList）{ Transaction tx = session.beginTransaction（）; session.insert（t）; try { txmit（）; } catch（ConstraintViolationException e）{ tx.rollback（）; log.warn（Ignoring duplicate：+ t）; } } session.close（）; batchList.clear（）; }

I'm updating a very large number of objects in batches and want to ignore any duplicates. What is the best way of doing this?

My understanding is that if a ConstrainViolationException is thrown all the other objects in the batch will NOT be persisted.

解决方案

This was my solution:

private void saveBatch() { StatelessSession session = sessionFactory.openStatelessSession(); Transaction tx = session.beginTransaction(); try { for (Object t : batchList) { session.insert(t); } txmit(); } catch (ConstraintViolationException e) { log.info("Duplicate in batch...save individually"); tx.rollback(); session.close(); saveIndividually(); return; } session.close(); batchList.clear(); } private void saveIndividually() { StatelessSession session = sessionFactory.openStatelessSession(); for (Object t : batchList) { Transaction tx = session.beginTransaction(); session.insert(t); try { txmit(); } catch (ConstraintViolationException e) { tx.rollback(); log.warn("Ignoring duplicate: " + t); } } session.close(); batchList.clear(); }