集成钉钉机器人

OkHttpUtils.postString() .mediaType(MediaType.parse("application/json; charset=utf-8"))
                .url(webhook).content("{\"text\":{\"content\":\"关键词: 我就是我,333是不一样444的烟火\"},\"msgtype\":\"text\"}")
                .build().execute(new StringCallback() {
            @Override
            public void onError(Call call, Exception e, int i) {
                e.printStackTrace();
            }

            @Override
            public void onResponse(String s, int i) {
                System.out.println("s = " + s);
            }
        });

参考

Java实现钉钉机器人推送消息 - CodeAntenna

	<dependencies>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.76</version>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>4.0.12</version>
        </dependency>
    </dependencies>

import cn.hutool.core.map.MapUtil;
import cn.hutool.http.HttpRequest;
import com.alibaba.fastjson.JSON;

import java.util.List;
import java.util.Map;

/**
 * @author AlanFin
 * @date 2021/5/10
 */
public class DingDingSendMsgUtils {

    /**
     * 超时时间
     */
    private static final int timeout = 10000;

    /**
     * 每个群开通的自定义机器人有webhook，后期可更换或写在配置文件作为参数传入
     */
    private static final String webhook = "刚刚获得Webhook地址";

    /**
     * 自定义关键词，安全设置，后期可更换或写在配置文件作为参数传入
     */
    private static final String CUSTOM_KEYWORDS = "刚刚写的自定义关键字:";

    /**
     * 提示@所有人
     *
     * @param msg 通知消息
     */
    private static void sendMessageAtAll(String msg) {
        Map<String, Object> atMap = MapUtil.newHashMap();
        atMap.put("isAtAll", true);
        String reqString = getString(msg, atMap);
        HttpRequest.post(webhook).body(reqString).timeout(timeout).execute().body();
    }

    /**
     * 提示@具体选择的某个人
     *
     * @param msg        通知消息
     * @param mobileList 通知人的电话号码
     */
    private static void sendMessageAtChosePerson(String msg, List<String> mobileList) {
        Map<String, Object> atMap = MapUtil.newHashMap();
        atMap.put("isAtAll", false);
        atMap.put("atMobiles", mobileList);
        String reqString = getString(msg, atMap);
        HttpRequest.post(webhook).body(reqString).timeout(timeout).execute().body();
    }


    private static String getString(String msg, Map<String, Object> atMap) {
        String content = CUSTOM_KEYWORDS + msg;
        Map<String, String> contentMap = MapUtil.newHashMap();
        contentMap.put("content", content);
        Map<String, Object> reqMap = MapUtil.newHashMap();
        reqMap.put("msgtype", "text");
        reqMap.put("text", contentMap);
        reqMap.put("at", atMap);
        String reqString = JSON.toJSONString(reqMap);
        return reqString;
    }

}