搜索结果
"tag:"hibernate""
| 标题及摘要 | 日期/时间 | |
|---|---|---|
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21
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配置Spring+hibernate使用ehcache作为second-level cache
大量数据流动是web应用性能问题常见的原因，而缓存被广泛的用于优化数据库应用。cache被设计为通过保存从数据库里load的数据来减少应用和数据库之间的数据流动。数据库访问只有当检索的数据不在cache里可用时才必要。hibernate可以用两种不同的对象缓存：first-level cache 和 second-level cache。first-level cache和Session对象关联，而second-level cache是和Session Factory对象关联。 缺省地，hiberna... |
2007-6-20 10:06:11 |
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22
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Hibernate optimistic locking exception
HibernateOptimisticLockingFailureException,The error occurs because at least 2 transactions are working on the same record(s). If a record is read by 2 transactions, and if the record is saved by one transaction first, and then by the second one, an optim... |
2007-4-26 13:19:57 |
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23
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在Hibernate里使用Oracle的强制索引查询提示hints
在Hibernate Hql里使用数据库某些特殊的功能，例如使用Oracle的查询提示(hints)(如强制Oracle使用某个索引)，使用用户自定义的数据库函数等，Hibernate的官方文档里已经有提到这个，不能使用Hql做数据库查询提示，而是使用三种Hibernate查询方法HQL,Criteria Queries,Native SQL里的Native SQL 本地SQL。 |
2007-4-10 10:13:35 |
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24
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SQL state [72000]; error code [1009]; ORA-01009: 必需的参数缺失 ;missing mandatory parameter
当应用出现如下异常： StatementCallback; uncategorized SQLException for SQL [select nvl(flow_Step,0) as flow_Step from ec_Acc_Fee where zone_Code like '01%' and user_Id=1004259812]; SQL state [72000]; error code [1009]; ORA-01009: 必需的参数缺失 ; nested exception is ja... |
2007-3-2 22:16:21 |
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25
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Hibernate Users FAQ
Hibernate Common Problems |
2007-2-2 12:56:31 |
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26
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a different object with the same identifier value was already associated with the session
I have found two solution to this issue. Here it is, there are two. 1. Use cascase = none. 2. Use merge instead of saveandupdate. The problem here is that you pass in a detached object which gets reattached to the Session. You also fetch the same ob... |
2007-1-30 15:03:50 |
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27
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Hibernate Performance Tips（Hibernate 性能技巧）
Some people I know are looking at porting their (very large) J2EE application from using a homegrown OR framework on top of Entity Beans with CMP (without CMR) to Hibernate, and they asked me for some tips. I‘m not claiming to be a Hibernate exp... |
2006-11-8 19:51:55 |
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28
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Wire Hibernate Transactions in Spring
本文主要探讨如何利用Spring来装配组件，包括其事务上下文。从J2EE应用程序内部连接到单个的数据库并不是什么难事。但是，如果要装配或者集成企业级的组件，情况就复杂了。一个组件可以有一个或多个支持它的数据库，因此，当装配两个或更多的组件时，我们希望能够保持在跨组件的多个数据库中进行的操作的原子... |
2006-10-9 20:21:26 |