解析HttpServletRequest 的body 内容

  public String getChars(HttpServletRequest request) {

    BufferedReader br = null;
    StringBuilder sb = new StringBuilder("");
    try {
      br = request.getReader();
      String str;
      while ((str = br.readLine()) != null) {
        sb.append(str);
      }
      br.close();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (null != br) {
        try {
          br.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
    return sb.toString();
  }