从HttpServletRequest获取POST数据的代码

 StringBuffer jb = new StringBuffer();
  String line = null;
  try {
    BufferedReader reader = request.getReader();
    while ((line = reader.readLine()) != null)
      jb.append(line);
  } catch (Exception e) { /*report an error*/ }

response.setCharacterEncoding("GBK");
response.setContentType("application/xml; charset=GBK");