java.io.NotSerializableException

Caused by: java.io.NotSerializableException: org.mortbay.jetty.servlet.HashSessionManager

 异常的原因：

public class ViewReportPage extends IasrsWebPage {
    private HttpSession session;
    private static final String pattern="yyyy-MM-dd";
    public ViewReportPage() {
         session = getWebRequestCycle().getWebRequest().getHttpServletRequest().getSession();
    }
}

    这样就会发生上面的异常。先private HttpSession session;在方法的外部定义，然后在构造方法里面再赋值，就出现异常。

应该改成

public class ViewReportPage extends IasrsWebPage {
    //private HttpSession session;
    private static final String pattern="yyyy-MM-dd";
    public ViewReportPage() {
          HttpSession session = getWebRequestCycle().getWebRequest().getHttpServletRequest().getSession();
    }
}

 这样就搞定啦！！