- HTML code
<a href="competitions/findByUserIdBy.action" target="main">赛事管理</a>
配置文件：
- XML code
<action name="findByUserIdBy" class="competitionsAction" method="findByUserId"> <result name="success">/web/competitions/competition.jsp </result> <result name="input">/web/competitions/deleteError.jsp</result> </action>
action：
- Java code
public String findByUserId() throws Exception { try { Map session = ActionContext.getContext().getSession(); String ids = session.get("userId").toString(); id = Long.parseLong(ids); listCompetitions = this.competitionsService.findByUserId(id); } catch (Exception e) { e.printStackTrace(); return INPUT; } return SUCCESS; }执行上面的那个超链接的时候，后台打印出了两条一样的SQL语句。
- SQL code
Hibernate: select competitio0_.id as id10_, competitio0_.name as name10_, competitio0_.startTime as startTime10_, competitio0_.endTime as endTime10_, competitio0_.address as address10_, competitio0_.sponsors as sponsors10_, competitio0_.organizer as organizer10_, competitio0_.coOrganizer as coOrgani8_10_, competitio0_.status as status10_, competitio0_.remarks as remarks10_, competitio0_.userId as userId10_ from sportSys.dbo.competitions competitio0_ where competitio0_.userId='9'Hibernate: select competitio0_.id as id10_, competitio0_.name as name10_, competitio0_.startTime as startTime10_, competitio0_.endTime as endTime10_, competitio0_.address as address10_, competitio0_.sponsors as sponsors10_, competitio0_.organizer as organizer10_, competitio0_.coOrganizer as coOrgani8_10_, competitio0_.status as status10_, competitio0_.remarks as remarks10_, competitio0_.userId as userId10_ from sportSys.dbo.competitions competitio0_ where competitio0_.userId='9'
百思不得其解啊，不知道为啥，
因为，我的一个更新报了如下的错误：很是烦人。我就怀疑是这个两次执行的问题引起的。谢谢~
- XML code
a different object with the same identifier value was already associated with the session: [com.yaxing.entity.Competitions#130]; nested exception is org.hibernate.NonUniqueObjectException:
------解决方案--------------------
在hibernate中同一个session里面有了两个相同标识但是是 不同实体时就会出现如标题的错误.
这个异常发生当你用session.load 或 session.get加载一个对象时 而又尝试着
session.update or session.lock 操作此对象
解决：
请不要用session加载对对象当你引用或再次使用该对象
------解决方案--------------------
不同的对象与相同的标识符值已经与会话关联起来
我以前也遇到过，忘记怎么解决了 ⊙﹏⊙b汗
------解决方案--------------------
看看你的DAO层和业务层
------解决方案--------------------
我似乎也被这种执行两次的问题困扰着，等解。
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