如何在JavaScript中使用struts标记

Question

I'm trying to get value from Action using Ajax request, but I'm having problem in using struts tag in javascript to show the value.

Javascript code:

 dojo.xhrPost({
            url: "dashboard"
            ,content: myParameterscomp
            , handle: function(response, ioargs) {

               if (ioargs.xhr.status == 200)
               {
                   var data = "<s:property value='#request.consumptionData'/>"
                   console.log(data);
               }

             }

            ,error: function (data) {
                handleError(data.description);
            }           
        });

Java code:

Map request = (Map)context.get("request");
 request.put("consumptionData",  43);

I'm getting the value of data as <s:property value='#request.consumptionData'/> on console instead of 43 . I'm using struts2. My javascript code is in JSP file. Could anyone please tell me how can I show the value?

Answer 1

You seems to be calling /dashboard page via Ajax from your homepage. And expecting it to send you request attribute consumptionData. This won't work as your JSP does not contain required data. You need to put data in JSP and then fetch the same in Ajax. Convert your response to JSON. The simplest way of doing this would be to put following like of code in your Ajax response JSP.

Dashboard.jsp

{"consumptionData": < "<s:property value='#request.consumptionData'/>"}

And in main page when you load this JSP via ajax, you can parse this JSON output and use data in Javascript.

var json = JSON.parse(response);
var data = eval(json.consumptionData);

Answer 2

Code in browser accepts JSON. You could serialize you request as JSON and embed in you JavaScript file. For example:

var data = <%= toJson(request.get("consumptionData")) %>

If the data is simplely Integer values, you can even directly put the value in the code:

var data = <%= request.get("consumptionData") %>

The syntax could be vary (I'm not familiar with struts tag), but the idea is the same.