1.配置微信公衆服務器

2.提前下好公衆号SHA1算法生成安全簽名類

/**
 * SHA1 class
 *
 * 計算公衆平台的(de)消息簽名接口.
 */
public class SHA1 {

	/**
	 * 用SHA1算法生成安全簽名
	 * @param token 票據
	 * @param timestamp 時(shí)間戳
	 * @param nonce 随機字符串
	 * @param encrypt 密文
	 * @return 安全簽名

	 */
	public static String getSHA1(String token, String timestamp, String nonce, String encrypt)
			  {
		try {
			String[] array = new String[] { token, timestamp, nonce, encrypt };
			StringBuffer sb = new StringBuffer();
			// 字符串排序
			Arrays.sort(array);
			for (int i = 0; i < 4; i++) {
				sb.append(array[i]);
			}
			String str = sb.toString();
			// SHA1簽名生成
			MessageDigest md = MessageDigest.getInstance("SHA-1");
			md.update(str.getBytes());
			byte[] digest = md.digest();

			StringBuffer hexstr = new StringBuffer();
			String shaHex = "";
			for (int i = 0; i < digest.length; i++) {
				shaHex = Integer.toHexString(digest[i] & 0xFF);
				if (shaHex.length() < 2) {
					hexstr.append(0);
				}
				hexstr.append(shaHex);
			}
			return hexstr.toString();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}






}

3.創建一個(gè)接口，就(jiù)是(shì)配置公衆号服務的(de)接口

 //微信公衆号驗證
    @RequestMapping("openWx/gzhVerification")
    public String gzhVerification(HttpServletRequest request){
        log.info("微信公衆号驗證");
        String signature=request.getParameter("signature");
        String timestamp=request.getParameter("timestamp");
        String nonce=request.getParameter("nonce");
        String echostr=request.getParameter("echostr");
        String token="token";//這(zhè)裏填基本配置中的(de)token
        String jiami="";
        try {


            jiami= SHA1.getSHA1(token, timestamp, nonce,"");//這(zhè)裏是(shì)對三個(gè)參數進行加密
          
        if(echostr!=null && jiami.equals(signature)){
            log.info("第一次申請驗證成功");
            return  echostr;
        }
        //判斷是(shì)否是(shì)公衆号發來(lái)的(de)請求
        if(jiami==null || !jiami.equals(signature)){

            log.info("錯誤的(de)請求");
            return null;
        }
          //----------------------事件推送
            Map<String, String> stringStringMap = parseXml(request);
        //---按鈕事件
          if("CLICK".equalsIgnoreCase(stringStringMap.get("Event"))){

              log.info("按鈕事件");
            //因爲(wéi / wèi)隻有一個(gè)按鈕所以(yǐ)不(bù)用判斷key了(le／liǎo)
              String fromUserName = toXML(stringStringMap.get("FromUserName"),stringStringMap.get("ToUserName"));
              log.info("fromUserName:"+fromUserName);
              //發送消息
              return  fromUserName;
              //關注公衆号數據
          }else if("subscribe".equalsIgnoreCase(stringStringMap.get("Event")) && stringStringMap.get("EventKey")==null  && stringStringMap.get("Ticket")==null){
              log.info("關注公衆号");
              customerWxGzhService._add(stringStringMap.get("FromUserName"),null);

              //取消關注
          }else if("unsubscribe".equalsIgnoreCase(stringStringMap.get("Event"))) {
              log.info("取消關注");

              customerWxGzhService._delete(stringStringMap.get("FromUserName"));

             //二維碼關注
          }else if("subscribe".equalsIgnoreCase(stringStringMap.get("Event")) && stringStringMap.get("EventKey")!=null  && stringStringMap.get("Ticket")!=null){

              log.info("二維碼關注");
              //獲取二維碼參數值
              String eventKey =stringStringMap.get("EventKey");
              eventKey= eventKey.substring(8);
              customerWxGzhService._add(stringStringMap.get("FromUserName"),eventKey);
          }

        } catch (Exception e) {
            // TODO Auto-generated catch block

            e.printStackTrace();
        }

        return  null;
    }


    /**
     * dom4j 解析 xml 轉換爲(wéi / wèi) map
     * @param request
     * @return
     * @throws Exception
     */
    public static Map<String, String> parseXml(HttpServletRequest request) throws Exception {
        // 将解析結果存儲在(zài)HashMap中
        Map<String, String> map = new HashMap<String, String>();
        // 從request中取得輸入流
        InputStream inputStream = request.getInputStream();
        // 讀取輸入流
        SAXReader reader = new SAXReader();
        Document document = reader.read(inputStream);
        // 得到(dào)xml根元素
        Element root = document.getRootElement();
        // 得到(dào)根元素的(de)所有子(zǐ)節點
        List<Element> elementList = root.elements();

        // 遍曆所有子(zǐ)節點
        for (Element e : elementList)
            map.put(e.getName(), e.getText());

        // 釋放資源
        inputStream.close();
        inputStream = null;
        return map;
    }


    //發送聯系我們
    public String toXML(String toUserName,String fromUserName){
        StringBuilder sb = new StringBuilder();
        sb.append("<xml>");
        sb.append("<ToUserName><![CDATA["+toUserName+"]]></ToUserName>");
        sb.append("<FromUserName><![CDATA["+fromUserName+"]]></FromUserName>");
        sb.append("<CreateTime>"+System.currentTimeMillis()/1000+"</CreateTime>");
        sb.append("<MsgType><![CDATA[text]]></MsgType>");
        sb.append("<Content><![CDATA[您好]]></Content>");
        sb.append("</xml>");
        return sb.toString();
    }

公衆号事件的(de)提示隻有一個(gè)接口 就(jiù)是(shì)不(bù)斷判斷Event參數來(lái)處理事件，