引用：http://blog.163.com/moshen128@126/blog/static/13542109620104135628662/
错误信息：
16:49:00,357 ERROR LazyInitializationException:42 - could not initialize proxy - no Session
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:132)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:174)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)
at com.xs.registration.model.User_$$_javassist_0.getUsername(User_$$_javassist_0.java)
16:49:05,975 ERROR LazyInitializationException:42 - could not initialize proxy - no Session
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:132)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:174)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)
at com.xs.registration.model.User_$$_javassist_0.toString(User_$$_javassist_0.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
解决：
Entity bean的porxy属性默认是true,会有延迟
在entity
@proxy(lazy=false)，会降低性能
解决2：openSessionInView配置成在页面返回给客户端前关闭session
<!--add for lazy load problem 20100514 必须搁在struts2 filter前面，必须的-->
<filter>
<filter-name>openSessionInView</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>openSessionInView</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--end for lazy load problem 20100514 -->
<!--add by xs 20091209 struts 2.1 ng:next generation-->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
<!--struts2 源码 -->
</filter>