public class TestController {  @RequestMapping("/a")  protected void doPost(HttpServletRequest request,      HttpServletResponse response, BufferedReader br)      throws ServletException, IOException {//Header部分    System.out.print(request.getHeaderNames());    Enumeration<?> enum1 = request.getHeaderNames();    while (enum1.hasMoreElements()) {      String key = (String) enum1.nextElement();      String value = request.getHeader(key);      System.out.println(key + "/t" + value);    }//body部分    String inputLine;    String str = "";    try {      while ((inputLine = br.readLine()) != null) {        str += inputLine;      }      br.close();    } catch (IOException e) {      System.out.println("IOException: " + e);    }    System.out.println("str:" + str);  }