2008-04-06

OpenSessionInViewFilter失效问题解决(SSH2)

关键字: opensessioninviewfilter 失效

今天在用Hibernate延迟加载时,显示到界面出现如下问题:
org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed

原因: 在界面加载数据时, session已经关闭,故报此错. 此前的对象只是代理对象(只有ID值)

故使用Spring 里的 OpenSessionInViewFilter 来解决此问题

在web.xml里配置 

<!--Hibernate Open Session in View Filter-->
<filter>
	<filter-name>hibernateFilter</filter-name>
	<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
	<filter-name>hibernateFilter</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>

 

再测试, 问题依然存在,,, 纳闷....... 后来分析,再google...  终于发现问题出在Struts2上....

现在的web.xml里,我是把OpenSessionInViewFilter的配置放在Struts2后面的.

我更改下前后顺序, 神奇的解决了:)   正确的配置顺序如下:

 

<!--Hibernate Open Session in View Filter 注意要放在Struts2配置前面-->
<filter>
	<filter-name>hibernateFilter</filter-name>
	<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
	<filter-name>hibernateFilter</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>

<filter>  
	<filter-name>Struts2</filter-name>  
	<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>  
</filter>  
<filter-mapping>  
	<filter-name>Struts2</filter-name>  
	<url-pattern>/*</url-pattern>  
</filter-mapping>

 

 

 

 

 

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