所需工具类,在需要通知的地方选择合适的方法,亲测有效

package com.saic.fin.system.util;

import com.aliyun.credentials.utils.StringUtils;
import com.dingtalk.api.DefaultDingTalkClient;
import com.dingtalk.api.DingTalkClient;
import com.dingtalk.api.request.OapiRobotSendRequest;
import com.dingtalk.api.response.OapiRobotSendResponse;
import com.taobao.api.ApiException;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.binary.Base64;
import org.springframework.util.CollectionUtils;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.List;

@Slf4j
public class DingTalkHelper {
    /**
     * 钉钉群设置 webhook, 支持重置,创建的群里机器人
     */
    private static final String ACCESS_TOKEN = "xxxxxx";
    /**
     * 消息类型
     */
    private static final String MSG_TYPE_TEXT = "text";
    private static final String MSG_TYPE_LINK = "link";
    private static final String MSG_TYPE_MARKDOWN = "markdown";
    private static final String MSG_TYPE_ACTION_CARD = "actionCard";
    private static final String MSG_TYPE_FEED_CARD = "feedCard";

    /**
     * 客户端实例
     */
    public static DingTalkClient client;

    static {
        try {
            client = new DefaultDingTalkClient(ACCESS_TOKEN + sign());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        }
    }



    /**
     * @param content    文本消息
     * @param mobileList 指定@ 联系人
     * @param isAtAll    是否@ 全部联系人
     * @description: 发送普通文本消息
     * @return: com.dingtalk.api.response.OapiRobotSendResponse
     * @author: niaonao
     * @date: 2019/7/6
     */
    public static OapiRobotSendResponse sendMessageByText(String content, List<String> mobileList, boolean isAtAll) {
        if (StringUtils.isEmpty(content)) {
            return null;
        }

        //参数	参数类型	必须	说明
        //msgtype	String	是	消息类型,此时固定为:text
        //content	String	是	消息内容
        //atMobiles	Array	否	被@人的手机号(在content里添加@人的手机号)
        //isAtAll	bool	否	@所有人时:true,否则为:false
        OapiRobotSendRequest.Text text = new OapiRobotSendRequest.Text();
        text.setContent(content);
        OapiRobotSendRequest request = new OapiRobotSendRequest();
        if (!CollectionUtils.isEmpty(mobileList)) {
            // 发送消息并@ 以下手机号联系人
            OapiRobotSendRequest.At at = new OapiRobotSendRequest.At();
            at.setAtMobiles(mobileList);
            at.setIsAtAll(isAtAll);
            request.setAt(at);
        }
        request.setMsgtype(DingTalkHelper.MSG_TYPE_TEXT);
        request.setText(text);

        OapiRobotSendResponse response = new OapiRobotSendResponse();
        try {
            response = DingTalkHelper.client.execute(request);
        } catch (ApiException e) {
            log.error("[发送普通文本消息]: 发送消息失败, 异常捕获{}", e.getMessage());
        }
        return response;
    }

    /**
     * @param title      消息标题
     * @param text       消息内容
     * @param messageUrl 点击消息后跳转的url
     * @param picUrl     插入图片的url
     * @description: 发送link 类型消息
     * @return: com.dingtalk.api.response.OapiRobotSendResponse
     * @author: niaonao
     * @date: 2019/7/6
     */
    public static OapiRobotSendResponse sendMessageByLink(String title, String text, String messageUrl, String picUrl) {
        if (StringUtils.isEmpty(title) || StringUtils.isEmpty(text) || StringUtils.isEmpty(messageUrl)) {
            return null;
        }
        //参数	参数类型	必须	说明
        //msgtype	String	是	消息类型,此时固定为:link
        //title	String	是	消息标题
        //text	String	是	消息内容。如果太长只会部分展示
        //messageUrl	String	是	点击消息跳转的URL
        //picUrl	String	否	图片URL
        OapiRobotSendRequest.Link link = new OapiRobotSendRequest.Link();
        link.setTitle(title);
        link.setText(text);
        link.setMessageUrl(messageUrl);
        link.setPicUrl(picUrl);

        OapiRobotSendRequest request = new OapiRobotSendRequest();
        request.setMsgtype(DingTalkHelper.MSG_TYPE_LINK);
        request.setLink(link);

        OapiRobotSendResponse response = new OapiRobotSendResponse();
        try {
            response = DingTalkHelper.client.execute(request);
        } catch (ApiException e) {
            log.error("[发送link 类型消息]: 发送消息失败, 异常捕获{}", e.getMessage());
        }
        return response;
    }


    /**
     * @param title        标题
     * @param markdownText 支持markdown 编辑格式的文本信息
     * @param mobileList   消息@ 联系人
     * @param isAtAll      是否@ 全部
     * @description: 发送Markdown 编辑格式的消息
     * @return: com.dingtalk.api.response.OapiRobotSendResponse
     * @author: niaonao
     * @date: 2019/7/6
     */
    public static OapiRobotSendResponse sendMessageByMarkdown(String title, String markdownText, List<String> mobileList, boolean isAtAll) {
        if (StringUtils.isEmpty(title) || StringUtils.isEmpty(markdownText)) {
            return null;
        }
        //参数	类型	必选	说明
        //msgtype	String	是	此消息类型为固定markdown
        //title	String	是	首屏会话透出的展示内容
        //text	String	是	markdown格式的消息
        //atMobiles	Array	否	被@人的手机号(在text内容里要有@手机号)
        //isAtAll	bool	否	@所有人时:true,否则为:false
        OapiRobotSendRequest.Markdown markdown = new OapiRobotSendRequest.Markdown();
        markdown.setTitle(title);
        markdown.setText(markdownText);

        OapiRobotSendRequest request = new OapiRobotSendRequest();
        request.setMsgtype(DingTalkHelper.MSG_TYPE_MARKDOWN);
        request.setMarkdown(markdown);
        if (!CollectionUtils.isEmpty(mobileList)) {
            OapiRobotSendRequest.At at = new OapiRobotSendRequest.At();
            at.setIsAtAll(isAtAll);
            at.setAtMobiles(mobileList);
            request.setAt(at);
        }

        OapiRobotSendResponse response = new OapiRobotSendResponse();
        try {
            response = DingTalkHelper.client.execute(request);
        } catch (ApiException e) {
            log.error("[发送link 类型消息]: 发送消息失败, 异常捕获{}", e.getMessage());
        }
        return response;
    }

    /**
     * @param title          消息标题, 会话消息会展示标题
     * @param markdownText   markdown格式的消息
     * @param singleTitle    单个按钮的标题
     * @param singleURL      单个按钮的跳转链接
     * @param btnOrientation 是否横向排列(true 横向排列, false 纵向排列)
     * @param hideAvatar     是否隐藏发消息者头像(true 隐藏头像, false 不隐藏)
     * @description: 整体跳转ActionCard类型的消息发送
     * @return: com.dingtalk.api.response.OapiRobotSendResponse
     * @author: niaonao
     * @date: 2019/7/6
     */
    public static OapiRobotSendResponse sendMessageByActionCardSingle(String title, String markdownText, String singleTitle, String singleURL, boolean btnOrientation, boolean hideAvatar) {
        if (StringUtils.isEmpty(title) || StringUtils.isEmpty(markdownText)) {
            return null;
        }
        //参数	类型	必选	说明
        //    msgtype	string	true	此消息类型为固定actionCard
        //    title	string	true	首屏会话透出的展示内容
        //    text	string	true	markdown格式的消息
        //    singleTitle	string	true	单个按钮的方案。(设置此项和singleURL后btns无效)
        //    singleURL	string	true	点击singleTitle按钮触发的URL
        //    btnOrientation	string	false	0-按钮竖直排列,1-按钮横向排列
        //    hideAvatar	string	false	0-正常发消息者头像,1-隐藏发消息者头像
        OapiRobotSendRequest.Actioncard actionCard = new OapiRobotSendRequest.Actioncard();
        actionCard.setTitle(title);
        actionCard.setText(markdownText);
        actionCard.setSingleTitle(singleTitle);
        actionCard.setSingleURL(singleURL);
        // 此处默认为0
        actionCard.setBtnOrientation(btnOrientation ? "1" : "0");
        // 此处默认为0
        actionCard.setHideAvatar(hideAvatar ? "1" : "0");

        OapiRobotSendRequest request = new OapiRobotSendRequest();
        request.setMsgtype(DingTalkHelper.MSG_TYPE_ACTION_CARD);
        request.setActionCard(actionCard);
        OapiRobotSendResponse response = new OapiRobotSendResponse();
        try {
            response = DingTalkHelper.client.execute(request);
        } catch (ApiException e) {
            log.error("[发送ActionCard 类型消息]: 整体跳转ActionCard类型的发送消息失败, 异常捕获{}", e.getMessage());
        }
        return response;
    }

    /**
     * @param title          标题
     * @param markdownText   文本
     * @param btns           按钮列表
     * @param btnOrientation 是否横向排列(true 横向排列, false 纵向排列)
     * @param hideAvatar     是否隐藏发消息者头像(true 隐藏头像, false 不隐藏)
     * @description: 独立跳转ActionCard类型 消息发送
     * @return: com.dingtalk.api.response.OapiRobotSendResponse
     * @author: niaonao
     * @date: 2019/7/6
     */
    public static OapiRobotSendResponse sendMessageByActionCardMulti(String title, String markdownText, List<OapiRobotSendRequest.Btns> btns, boolean btnOrientation, boolean hideAvatar) {
        if (StringUtils.isEmpty(title) || StringUtils.isEmpty(markdownText) || CollectionUtils.isEmpty(btns)) {
            return null;
        }
        //参数	类型	必选	说明
        //msgtype	string	true	此消息类型为固定actionCard
        //title	string	true	首屏会话透出的展示内容
        //text	string	true	markdown格式的消息
        //btns	array	true	按钮的信息:title-按钮方案,actionURL-点击按钮触发的URL
        //btnOrientation	string	false	0-按钮竖直排列,1-按钮横向排列
        //hideAvatar	string	false	0-正常发消息者头像,1-隐藏发消息者头像
        OapiRobotSendRequest.Actioncard actionCard = new OapiRobotSendRequest.Actioncard();
        actionCard.setTitle(title);
        actionCard.setText(markdownText);
        // 此处默认为0
        actionCard.setBtnOrientation(btnOrientation ? "1" : "0");
        // 此处默认为0
        actionCard.setHideAvatar(hideAvatar ? "1" : "0");

        actionCard.setBtns(btns);

        OapiRobotSendRequest request = new OapiRobotSendRequest();
        request.setMsgtype(DingTalkHelper.MSG_TYPE_ACTION_CARD);
        request.setActionCard(actionCard);
        OapiRobotSendResponse response = new OapiRobotSendResponse();
        try {
            response = DingTalkHelper.client.execute(request);
        } catch (ApiException e) {
            log.error("[发送ActionCard 类型消息]: 独立跳转ActionCard类型发送消息失败, 异常捕获{}", e.getMessage());
        }
        return response;
    }

    /**
     * @param links
     * @description: 发送FeedCard类型消息
     * @return: com.dingtalk.api.response.OapiRobotSendResponse
     * @author: niaonao
     * @date: 2019/7/6
     */
    public static OapiRobotSendResponse sendMessageByFeedCard(List<OapiRobotSendRequest.Links> links) {
        if (CollectionUtils.isEmpty(links)) {
            return null;
        }

        //msgtype	string	true	此消息类型为固定feedCard
        //title	string	true	单条信息文本
        //messageURL	string	true	点击单条信息到跳转链接
        //picURL	string	true	单条信息后面图片的URL
        OapiRobotSendRequest.Feedcard feedcard = new OapiRobotSendRequest.Feedcard();
        feedcard.setLinks(links);
        OapiRobotSendRequest request = new OapiRobotSendRequest();
        request.setMsgtype(DingTalkHelper.MSG_TYPE_FEED_CARD);
        request.setFeedCard(feedcard);
        OapiRobotSendResponse response = new OapiRobotSendResponse();
        try {
            response = DingTalkHelper.client.execute(request);
        } catch (ApiException e) {
            log.error("[发送ActionCard 类型消息]: 独立跳转ActionCard类型发送消息失败, 异常捕获{}", e.getMessage());
        }
        return response;
    }


    public static String sign() throws NoSuchAlgorithmException, UnsupportedEncodingException, InvalidKeyException {
        Long timestamp = System.currentTimeMillis();
        String secret = "SEC15f11b9a12215ed37ac25fd6f9c116276f56adaf5f83044fce16f20c5f0e50c9";
        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");
        return "×tamp=" + timestamp + "&sign=" + sign;
    }
}