protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setCharacterEncoding("GBK"); String userid = req.getParameter("userid"); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(resp.getOutputStream(), "GBK")); RecordService service = DataCache.getInstance().getService(); Consumer consumer = service.getConsumerWithInStoreRecords(userid); String result = JSON.toJSONString(consumer); bw.write(result); bw.flush(); bw.close(); }