ajax and json jsp page framework ssh

1: The need to import the jar

commons-beanutils-1.8.3.jar

commons-collections-3.2.1

commons-lang-2.5

commons-logging-1.1.1

ezmorph-1.0.6

json-lib-2.3-jdk15

Note: If you import imported json-lib-2.3-jdk15 but also reported net.sf.json.JSONArray.class not find the words, need to re-publish to tomcat

2: page end

<script type="text/javascript">
     $(function(){
     var loginUserId=${session.loginUser.id};
     //新消息提醒
     function message(){
    $.ajax({
  type: "POST",
  url: "${pageContext.request.contextPath }/client/cMessageAction_show.action",
  data:"loginUserId="+loginUserId+"",
  dataType:"json",
  success: function(msg){
    alert( "Data Saved: "+msg[0].time);
  },
  error:function(){
    alert ( "wrong");
  }
});
     }
       if(loginUserId!=""){
    setInterval(message, 5000); 
  } 
     });
    </script>

3: struts2 end

List<Message> list=messageService.findAllMessage(loginUserId);
// cascade, can not be directly transformed into the map inside to remove the List  
      JsonConfig cfg = new JsonConfig();  
      // filter association, to avoid infinite loop net.sf.json.JSONException: java.lang.reflect.InvocationTargetException  
      cfg.setJsonPropertyFilter(new PropertyFilter()  
      {  
           public boolean apply(Object source, String name, Object value) {  
             // filter out as to what to attribute the user will not be put in json
             if(name.equals("user")||name.equals("id")) {  
                 System.out.println(name+"--");
             return true;  
             } else { 
             System.out.println(name+"==");
               return false;  
            }  
          }  
         });  
      //net.sf.json.JSONException: java.lang.reflect.InvocationTargetException abnormal  
     cfg.setExcludes(new String[]{"handler","hibernateLazyInitializer"});  
      // javabean in the cycle call occurs quickly with a parent or excludes kill children   
     // cfg.setExcludes(new String[]{"addressGroup"});   
      //net.sf.json.JSONException: java.lang.reflect.InvocationTargetException date format conversion error  
     cfg.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);     
     // cfg.registerJsonValueProcessor(Date.class, new DateJsonValueProcessor("yyyy-MM-dd hh:mm:ss"));  
    
     JSONArray json=new JSONArray().fromObject(list,cfg);

    HttpServletResponse response = ServletActionContext.getResponse();  
    response.setCharacterEncoding("UTF-8");  
PrintWriter out = response.getWriter();


if(out!=null){

             out.print(json.toString());
         out.flush();
         out.close();
      }