AJAX 返回值的操作

public String XXXX(){
protected HttpServletRequest request = null;
request = ServletActionContext.getRequest();
 JSONObject json = JSONObject.fromObject(returnMap); 
request.setAttribute("result", json.toString());
return "success"
}

 

 

success:function(data){
            try{
            var r = JSON.parse(data);  //data为json对象
         
               for (var key in r)
                 {
                     keyID=key;
                    SerialStr=r[key];
             
                 }
               
            }catch (e) {
            }
            },
error:function(){
    alert("error");
}