微信公众平台开发之token验证和消息处理的方法

/**   *   * @Description: 微信消息处理以及用户分组   * @author zhangjun   * @date 2014-1-7 上午10:51:51   */  public class WeiXinMessageAction extends BaseAction{      /**       *       */      private static final long serialVersionUID = 1L;               private IFeWeiXinMessageService weiXinExternalService;               private String wxNo;               public String responseMessgaeInfo(){          Boolean isGet = request.getMethod().equalsIgnoreCase("GET");          if(isGet){              validateSignature();          }else{              saveWxMessage();          }          return null;      }      /**       *       * @Description: 接收post保存接受的消息 只保存MsgType类型为text信息       * @param          * @return void       * @throws       */      private void saveWxMessage(){          InputStream inputStream;          try {              request.setCharacterEncoding("UTF-8");              Document doc = null;              SAXReader reader = new SAXReader();              inputStream = request.getInputStream();              doc = reader.read(inputStream);              Element root = doc.getRootElement();              String toUserName = root.element("ToUserName").getTextTrim();              String fromUserName = root.element("FromUserName").getTextTrim();              String content = root.element("Content").getTextTrim();              String msgType=root.element("MsgType").getTextTrim();              String msgId=root.element("MsgId").getTextTrim();              String createTime=root.element("CreateTime").getTextTrim();              //只保存文本消息              //时间              System.out.println("接收消息内容:"+content+"-----------------msgType:"+msgType);              if(WeiXinMsgType.TEXT.type.equals(msgType)){                  weiXinExternalService.addWxMessage(toUserName, fromUserName, content, msgType, msgId, formatTime(createTime));              }          } catch (Exception e) {              e.printStackTrace();          }      }               /**       *       * @Description: 传入的CreateTime转换成long类型       * @param @param createTime       * @param @return         * @return Date       * @throws       */      private   Date formatTime(String createTime) {          long msgCreateTime = Long.parseLong(createTime) * 1000L;          return new Date(msgCreateTime);      }               /**       *       * @Description: 校验微信签名       * @param          * @return void       * @throws       */      private void validateSignature(){          PrintWriter out = null;          try {              String signature = request.getParameter("signature");              String timestamp = request.getParameter("timestamp");              String nonce = request.getParameter("nonce");              out = response.getWriter();              if (checkSignature(signature, timestamp, nonce)) {                  out.print(request.getParameter("echostr"));              }          } catch (Exception e) {              e.printStackTrace();          } finally {              out.close();              out = null;          }      }               /**       *       * @Description: 判断token是否合法       * @param @param signature       * @param @param timestamp       * @param @param nonce       * @param @return         * @return boolean       * @throws       */      private  boolean checkSignature(String signature, String timestamp, String nonce) {              //根据微信账号获取token并校验              Map<String,Object> map=new HashMap<String,Object>();              map.put("wxNo", wxNo);              WeiXinMasterConfig  masterConfig= weiXinExternalService.selectWeiXinMasterConfig(map);              if(masterConfig==null){                  return false;              }              String[] arr = new String[] {masterConfig.getWxToken(), timestamp, nonce };              Arrays.sort(arr);              StringBuilder content = new StringBuilder();              for (int i = 0; i < arr.length; i++) {                  content.append(arr[i]);              }              MessageDigest md = null;              String tmpStr = null;              try {                  md = MessageDigest.getInstance("SHA-1");                  byte[] digest = md.digest(content.toString().getBytes());                  tmpStr = byteToStr(digest);              } catch (NoSuchAlgorithmException e) {                  e.printStackTrace();              }              content = null;              return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false;      }      // 将字节转换为十六进制字符串      private static String byteToHexStr(byte ib) {          char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',                  'B', 'C', 'D', 'E', 'F' };          char[] ob = new char[2];          ob[0] = Digit[(ib >>> 4) & 0X0F];          ob[1] = Digit[ib & 0X0F];          String s = new String(ob);          return s;      }      // 将字节数组转换为十六进制字符串      private static String byteToStr(byte[] bytearray) {          String strDigest = "";          for (int i = 0; i < bytearray.length; i++) {              strDigest += byteToHexStr(bytearray[i]);          }          return strDigest;      }

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