servlet 获取 body Json数据

public void method(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
　　　　　　　String[] arr = null;
　　　　try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    (ServletInputStream) request.getInputStream()));
            String line = null;
            StringBuilder sb = new StringBuilder();
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            @SuppressWarnings("rawtypes")
            Map map = (Map)JSONObject.fromObject(sb.toString());

            String str = map.get("uuid").toString();

　　　　} catch (Exception e) {
       }
}