Spring MVC 中Ajax返回字符串

今天想用Ajax返回一个html的字符串数据。

JavaScript代码：

 function saveMarkSolve() {
     //editor1.sync();
     //var s = editor1.html();
     $.ajax({
            type: "GET",
            dataType: "html",
            url: "../exceptions/getHtml",
            //data: "ExceptionId=" + exceptionId,
            success: function(msg){
                    $("#main_container").empty();
                 $("#main_container").html(msg);
            },error :function() {
                alert("请求失败");
            }
         });

 }

Java代码：

　　

 @RequestMapping(value = "/getHtml", method = RequestMethod.GET)
     public void getHtml(HttpServletResponse responses){
         try{
           DefaultHttpClient httpclient = new DefaultHttpClient();
           String uri = "http://192.168.0.6:9011/home/WWW";
           HttpGet httppost = new HttpGet(uri);
           //添加http头信息
           httppost.addHeader("iv-user", "liu_jun"); //认证token
           //http post的json数据格式：  {"name": "your name","parentId": "id_of_parent"}
           //JSONObject obj = new JSONObject();
          // httppost.setEntity(new StringEntity(obj.toString()));
           HttpResponse response;
           response = httpclient.execute(httppost);
           //检验状态码，如果成功接收数据
           int code = response.getStatusLine().getStatusCode();
           Map<String, Object> msg = new HashMap<String, Object>();
           if (code == 200) {
               String rev = EntityUtils.toString(response.getEntity());//返回json格式： {"id": "27JpL~j4vsL0LX00E00005","version": "abc"}
               System.out.println(rev);
               responses.setContentType("text/html;charset=utf-8");
               PrintWriter out=responses.getWriter();
               out.print(rev);
           } else {
              System.out.println("111");
           }
       } catch (ClientProtocolException e) {
               e.printStackTrace();
       } catch (IOException e) {
           e.printStackTrace();
       } catch (Exception e) {
               e.printStackTrace();
       }
     }

核心代码：

 responses.setContentType("text/html;charset=utf-8");
 PrintWriter out=responses.getWriter();
 out.print(rev);