1. Create a Springboot web project

New Project

Parameter setting

Choose what springboot embeds

After setting up, if there is a Servlet created, it needs to be configured

To use Servlet, ServletComponentScan must be configured. The path of Servlet is configured in basePackages.

2. Write verification program

The first is to fill in the URL

What I received above is /wx

So what I configure on the WeChat official account is the URL of ngrok

http://missgxl.free.idcfengye.com + /wx/

Write verification information

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        System.out.println("get");
        //微信平台接入验证
        /**
         *
         * signature   微信加密签名，signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。
         * timestamp   时间戳
         * nonce   随机数
         * echostr 随机字符串
         */
        String signature = (String) req.getParameter("signature");
        String timestamp = (String) req.getParameter("timestamp");
        String nonce =  (String) req.getParameter("nonce");
        String echostr =  (String) req.getParameter("echostr");

        // 能获取到了配置信息
        // 按照规则进行校验
        if (WxutilService.check(timestamp,nonce,signature)){
            System.out.println("接入成功");
            PrintWriter out = resp.getWriter();
            //原样返回echostr完成接入校验
            out.write(echostr);
            out.flush();
            out.close();
        }else {
            System.out.println("接入失败");
        }

    }

Information verification process

private static final String TOKEN = "xx"; //在测试公众号上填写的Token

public static boolean check(String timestamp, String nonce, String signature)  {
    // 1）将token、timestamp、nonce三个参数进行字典序排序
    String [] strs = new String[]{TOKEN,timestamp,nonce};
    Arrays.sort(strs);
    // 2）将三个参数字符串拼接成一个字符串进行sha1加密
    String str = strs[0]+strs[1]+strs[2];

    String mysig = sha1(str);
    System.out.println(mysig);
    System.out.println(signature);

    // 3）开发者获得加密后的字符串可与signature对比，标识该请求来源于微信
    return mysig.equalsIgnoreCase(signature);
}

  // 进行sha1加密
    private static String sha1(String str)  {
        try {
            //获取加密对象
            MessageDigest md = MessageDigest.getInstance("sha1");
            //进行加密操作
            byte[] digest =md.digest(str.getBytes());
            char[] chars = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
            StringBuilder sb = new StringBuilder();
            // 处理加密结果
            // 处理详解 获取的byte是8位， 8位带代表两个字节所以有高4位和低四位分开处理
            // 四位二进制代表 0-15
            for (byte b : digest){
                // 首先进行第四位的处理
                sb.append(chars[(b>>4)&15]);
                // 然后进行高四位的处理
                sb.append(chars[(b)&15]);
            }
            return sb.toString();
        }catch (Exception e){
        }
        return "0";
    }

It can be configured after verification through WeChat

Section 03-WeChat Official Account Verification

1. Create a Springboot web project

2. Write verification program

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