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paip.hibernatesave失败的解决

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Release: 2016-06-07 15:55:13
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paip.hibernate save 失败的解决 打开log debug level,,看不见insert 代码... Hibernate select max(ID).txt 值得注意的是,save()方法并不立即执行SQL insert语句。只有当Session清理缓存时,才会执行SQL insert语句。如果在save()方法之后,又修改了持久化

paip.hibernate save 失败的解决

打开log debug level,,看不见insert 代码...

Hibernate select max(ID).txt

值得注意的是,save()方法并不立即执行SQL insert语句。只有当Session清理缓存时,才会执行SQL insert语句。如果在save()方法之后,又修改了持久化对象的属性,这会使得Session在清理缓存时,额外执行SQL update语句。以下两段代码尽管都能完成相同的功能,但是左边代码仅执行一条SQL insert语句,而右边代码执行一条SQL insert和一条SQL update语句。

作者 老哇的爪子 Attilax 艾龙, EMAIL:1466519819@qq.com
来源: http://blog.csdn.net/attilax

TProbeCustom o=new TProbeCustom();
o.setName("namexx");
TProbeCustomDAO d=new TProbeCustomDAO();
Session session = d.getSession();
Session session2 = d.getSession();
//lyag session address yyeo .sh yg obj.
core.log("---"+session.hashCode()+"---"+session2.hashCode() );
Transaction tx = session.beginTransaction();

d.save(o);
tx.commit();
System.out.println("f");

就ok兰...也能看见insert sql兰...
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