Java implements WeChat official account development server authentication

 There are two ways

 

The first

the easiest:

When you click submit, the WeChat official account will send a get request to your url,

There is an echostr parameter in it, just return it directly,

The second type:

It is based on the signature sent by WeChat, and then you encrypt the data, compare the data, and then return the echostr

directly on the code

 @RequestMapping("/wx")
    @ResponseBody
    public String wxGZHGetMsg(HttpServletRequest request){
    
        // 获取随机数
        String echostr = request.getParameter("echostr");
        // 加密签名
        String signature = request.getParameter("signature");
        //随机数
        String nonce = request.getParameter("nonce");
        //时间戳
        String timestamp = request.getParameter("timestamp");
        // 自己在微信开发那里设置的
        String token ="aaa";
        List<String> list = new ArrayList<>();
        list.add(token);
        list.add(timestamp);
        list.add(nonce);
        Collections.sort(list);
        String join = String.join("", list);
        String s = DigestUtils.sha1DigestAsHex(join);
        System.out.println(s);
        System.out.println(signature);
        return request.getParameter("echostr");
    }