ajax与springmvc

$.ajax({
	type : 'POST',
	url : '../list/type.action',
	dataType : 'json',
	data : {'index':0,'size':4},
	success : function(data) {},
	error : function(XMLHttpRequest, textStatus, errorThrown) {}
});

@RequestMapping(value = "/list/type.action", method = RequestMethod.POST)
@ResponseBody
public void getBaiduImg(HttpServletRequest request, HttpServletResponse response){
	Map<String,Object> resultMap = new HashMap<String,Object>();
	List<ImgType> list=pd.get(Integer.valueOf(request.getParameter("index")),Integer.valueOf(request.getParameter("size")));
	resultMap.put("result", "success");
	resultMap.put("data", list);
	JSONObject result=JSONObject.fromObject(resultMap);
	sendToAjax(response,result.toString());
}

private void sendToAjax(HttpServletResponse response, String data) {
	PrintWriter pw = null;
	try {
	      pw = response.getWriter();
	      pw.print(data);
	} catch (IOException e) {
	      System.err.print(e);
	} finally {
	      if (null != pw) {
	          pw.flush();
	          pw.close();
	      }
	}
}