Java开发微信公众平台之接收消息并处理（三）

 /**
     * 接收微信推送的事件消息并处理
     * @return
     */
    @RequestMapping(value = "/wechat")
    public String checkToken(HttpServletRequest request) {


        //给微信返回消息数据
        String msg = null;


        // 获得微信端返回的xml数据
        InputStream is = null;
        InputStreamReader isr = null;
        BufferedReader br = null;


        try {


            is = request.getInputStream();
            isr = new InputStreamReader(is, "utf-8");
            br = new BufferedReader(isr);
            String str = null;
            StringBuffer returnXml= new StringBuffer();
            while ((str = br.readLine()) != null) {
                //返回的是xml数据
                returnXml.append(str);
            }


            //将得到的xml数据转换为map
            Map<String, String> map = WechatUtil.xmlToMap(returnXml.toString());
            log.info("接收事件消息：{}",map);
            
            //拿出消息类型，event为事件消息
            String msgType = map.get("MsgType");
            if("event".equals) {
              //拿出具体的事件名称
              String event = map.get("Event");
              
              //-------此处编写处理事件消息的具体逻辑----
            }
            
            //------------此处编写其他消息的处理逻辑---------
            
        }catch (Exception e) {
            log.error("处理微信公众号接收事件消息失败！",e);
        }finally {
            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != isr) {
                try {
                    isr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        log.info("被动回复的消息为：{}",msg);
        return msg;
    }