開發環境：
Struts 1.2 + Spring 1.2.8 + Hibernate 3.2

遇到的問題：
org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
?at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:60)
?at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
?at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:172)
?at com.zhjy.gea.module.affair.domain.Affair$$EnhancerByCGLIB$$e10be950.getAffairCatalogs(<generated>)
?at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
?at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
?at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
?at java.lang.reflect.Method.invoke(Method.java:585)
?at org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBean.java:2049)
?at org.apache.commons.beanutils.PropertyUtilsBean.getSimpleProperty(PropertyUtilsBean.java:1286)
?at org.apache.commons.beanutils.BeanUtilsBean.copyProperties(BeanUtilsBean.java:284)
?at org.apache.commons.beanutils.BeanUtils.copyProperties(BeanUtils.java:137)

分析原因：
由于Spring控制的Hibernate的生命周期只針對數據層和服務層，而未管理到表現層，所以會出現the owning Session was closed的現象。針對這一點，我通過hibernate filter的方式來解決。

解決方法：
在web.xml中配置filter來解決。

<!-- ?hibernate?session?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 > *.do </ url-pattern >
? </ filter-mapping >