Jetty Struts2 Result ‘Null’ Not Found

OGNL會執行執行安全檢測，但是並不被GAE所支持，解決方法是創建一個監聽器，將安全檢查處理器置空

OgnlRuntime.setSecurityManager(null);

web.xml添加

<listener>
  <listener-class>com.llx.gps.listener.Struts2ListenerOnGAE</listener-class>
 </listener>

package com.llx.gps.listener;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

import ognl.OgnlRuntime;

public class Struts2ListenerOnGAE implements ServletContextListener, HttpSessionListener, HttpSessionAttributeListener {

 public void contextInitialized(ServletContextEvent sce) {
  OgnlRuntime.setSecurityManager(null);
 }

 @Override
 public void contextDestroyed(ServletContextEvent arg0) {
  // TODO Auto-generated method stub

 }

 @Override
 public void sessionCreated(HttpSessionEvent arg0) {
  // TODO Auto-generated method stub

 }

 @Override
 public void sessionDestroyed(HttpSessionEvent arg0) {
  // TODO Auto-generated method stub

 }

 @Override
 public void attributeAdded(HttpSessionBindingEvent arg0) {
  // TODO Auto-generated method stub

 }

 @Override
 public void attributeRemoved(HttpSessionBindingEvent arg0) {
  // TODO Auto-generated method stub

 }

 @Override
 public void attributeReplaced(HttpSessionBindingEvent arg0) {
  // TODO Auto-generated method stub

 }

}

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