钉钉自定义机器人发送消息到钉钉群[通俗易懂]

大家好，又见面了，我是你们的朋友全栈君。

1、新建机器人

2、生成密钥

package com.epmet.commons.tools.utils;

/**
 * 描述一下
 *
 * @author xxxx
 * @date 2020/6/24 17:42
 */
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import java.net.URLEncoder;

public class Test {
    public static void main(String[] args) throws Exception {
       //毫秒级
       Long timestamp = System.currentTimeMillis();
       String secret = "密钥，机器人安全设置页面，加签一栏下面显示的SEC开头的字符串";

        String stringToSign = timestamp + "\n" + secret;
        Mac mac = Mac.getInstance("HmacSHA256");
        mac.init(new SecretKeySpec(secret.getBytes("UTF-8"), "HmacSHA256"));
        byte[] signData = mac.doFinal(stringToSign.getBytes("UTF-8"));
        String sign = URLEncoder.encode(new String(Base64.encodeBase64(signData)),"UTF-8");
        System.out.println(sign);
    }

}

3、postman测试：

{
    "msgtype": "text", 
    "text": {
        "content": "Bug通知:群解散了"
    }, 
    "at": {
        "atMobiles": [
            "15764229697", 
            "13396481259"
        ], 
        "isAtAll": true
    }
}