HttpSession session 问题

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在使用 springside 框架时

异常：

[ERROR] org.hibernate.LazyInitializationException - failed to lazily initialize a collection of role: org.springside.examples.miniweb.entity.security.Role.authorityList, no session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.springside.examples.miniweb.entity.security.Role.authorityList, no session or session was closed
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108)
at org.hibernate.collection.PersistentBag.toString(PersistentBag.java:506)
at java.lang.String.valueOf(String.java:2827)
at java.lang.StringBuffer.append(StringBuffer.java:219)
at org.apache.commons.lang.builder.ToStringStyle.appendDetail(ToStringStyle.java:590)
at org.apache.commons.lang.builder.ToStringStyle.appendInternal(ToStringStyle.java:465)
at org.apache.commons.lang.builder.ToStringStyle.append(ToStringStyle.java:428)
at org.apache.commons.lang.builder.ToStringBuilder.append(ToStringBuilder.java:840)
at org.apache.commons.lang.builder.ReflectionToStringBuilder.appendFieldsIn(ReflectionToStringBuilder.java:606)
at org.apache.common

原因与解决：

当某个用户登录，并将用户信息放到 session 里，在对用户信息修改之后，session 会自动关闭需要给他从新赋值用户信息