SpringBoot实现钉钉机器人消息推送的示例代码

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 {
  Long timestamp = System.currentTimeMillis();
  String secret = "this is secret";

  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);
 }
}

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
import java.net.URLEncoder;

public class ding {
 public static void main(String[] args) throws Exception {
  //获取时间戳
  Long timestamp = System.currentTimeMillis();
  //定义密钥
  String secret = "this is secret";
  //把时间戳和密钥拼接成字符串，中间加入一个换行符
  String stringToSign = timestamp + "\n" + secret;
  //声明一个Mac对象，用来操作字符串
  Mac mac = Mac.getInstance("HmacSHA256");
  //初始化Mac对象，设置Mac对象操作的字符串是UTF-8类型，加密方式是SHA256
  mac.init(new SecretKeySpec(secret.getBytes("UTF-8"), "HmacSHA256"));
  //把字符串转化成字节形式
  byte[] signData = mac.doFinal(stringToSign.getBytes("UTF-8"));
  //新建一个Base64编码对象
  Base64.Encoder encoder = Base64.getEncoder();
  //把上面的字符串进行Base64加密后再进行URL编码
  String sign = URLEncoder.encode(new String(encoder.encodeToString(signData)),"UTF-8");
  //分别输出时间戳和加密信息
  System.out.println(timestamp);
  System.out.println(sign);
 }
}

//替换参数后，在终端执行
curl 'https://oapi.dingtalk.com/robot/send?access_token=70c168d03e73728ef36abea63c3c10048cbd054913cfeb&timestamp=1584607421017&sign=gJ3l4mhnlMuHxK1qFUx1kKUSdjuCNntsdG%2Bv%2BTCrLQM%3D' \
 -H 'Content-Type: application/json' \
 -d '{"msgtype": "text", 
  "text": {
    "content": "我就是我, 是不一样的烟火"
  },
  "sign": "gJ3l4mhnlMuHxK1qFUx1kKUSdjuCNntsdG%2Bv%2BTCrLQM%3D"
  }'

<dependency>
 <groupId>org.apache.httpcomponents</groupId>
 <artifactId>httpclient</artifactId>
 <version>4.5.9</version>
</dependency>

public class DingService {
 //请求地址以及access_token
 String Webhook = "https://oapi.dingtalk.com/robot/send?access_token=YOUR TOKEN";
 //密钥
 String secret = "YOUR SECRET";

 /*
 ** 生成时间戳和验证信息
 */
 
 public String encode() throws Exception {
  //获取时间戳
  Long timestamp = System.currentTimeMillis();
  //把时间戳和密钥拼接成字符串，中间加入一个换行符
  String stringToSign = timestamp + "\n" + this.secret;
  //声明一个Mac对象，用来操作字符串
  Mac mac = Mac.getInstance("HmacSHA256");
  //初始化，设置Mac对象操作的字符串是UTF-8类型，加密方式是SHA256
  mac.init(new SecretKeySpec(this.secret.getBytes("UTF-8"), "HmacSHA256"));
  //把字符串转化成字节形式
  byte[] signData = mac.doFinal(stringToSign.getBytes("UTF-8"));
  //新建一个Base64编码对象
  Base64.Encoder encoder = Base64.getEncoder();
  //把上面的字符串进行Base64加密后再进行URL编码
  String sign = URLEncoder.encode(new String(encoder.encodeToString(signData)),"UTF-8");
  System.out.println(timestamp);
  System.out.println(sign);
  String result = "&timestamp=" + timestamp + "&sign=" + sign;
  return result;
 };

 /* param: message 要发送的信息
 ** return: void 无返回值
 ** 作用：把传入的message发送给钉钉机器人*/

 public void dingRequest(String message){
  CloseableHttpClient httpClient = HttpClientBuilder.create().build();
  String url = null;
  try {
   url = this.Webhook + this.encode();
  } catch (Exception e) {
   e.printStackTrace();
  }
  HttpPost httpPost = new HttpPost(url);
  //设置http的请求头，发送json字符串，编码UTF-8
  httpPost.setHeader("Content-Type", "application/json;charset=utf8");
  //生成json对象传入字符
  JSONObject result = new JSONObject();
  JSONObject text = new JSONObject();
  text.put("content", message);
  result.put("text", text);
  result.put("msgtype", "text");
  String jsonString = JSON.toJSONString(result);
  StringEntity entity = new StringEntity(jsonString, "UTF-8");
  //设置http请求的内容
  httpPost.setEntity(entity);
  // 响应模型
  CloseableHttpResponse response = null;
  try {
   // 由客户端执行(发送)Post请求
   response = httpClient.execute(httpPost);
   // 从响应模型中获取响应实体
   HttpEntity responseEntity = response.getEntity();
   System.out.println("响应状态为:" + response.getStatusLine());
   if (responseEntity != null) {
    System.out.println("响应内容长度为:" + responseEntity.getContentLength());
    System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
   }
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   try {
    // 释放资源
    if (httpClient != null) {
     httpClient.close();
    }
    if (response != null) {
     response.close();
    }
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
 }
}