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);