could not initialize proxy - the owning Session wa

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的生命周期只针对数据层和服务层，而未管理到表现层，所以会出现the owning Session was closed的现象。针对这一点，我通过hibernate filter的方式来解决。

解决方法：
在web.xml中配置filter来解决。

<!--  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 >