Java 序列化HttpSession对象

我尝试序列化HttpSession对象，并得到以下验证

java.io.NotSerializableException: org.apache.catalina.session.StandardSessionFacade
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1081)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at com.tps.Session.saveSession(Session.java:16)
at org.apache.jsp.setSession_jsp._jspService(setSession_jsp.java:56)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:873)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:595)

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你为什么要这么做

HttpSession

对象不可序列化，也不应序列化

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如果需要保存会话的内容，请逐个迭代会话属性，并序列化这些属性。

此外，请记住，存储在HttpSession中的对象应该是可序列化的，尤其是在将web应用程序部署到集群时，在这种情况下，会话可能需要从一个JVM移动到另一个JVM。
HttpSession.setAttribute方法不强制执行此规则，该方法将对象作为参数而不是可序列化的，因此开发人员需要遵循此良好实践

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这与具体问题完全无关。这与原始问题有关。它为公认的答案提供了额外的见解。这可以帮助其他难以理解在HttpSession中哪些是可序列化的，哪些不是可序列化的的的人。WebSocketSession如何，您需要将消息发送到客户端