public class SlackNotifier extends AbstractStatusChangeNotifier

protected void doNotify(ClientApplicationEvent event) throws Exception {
    this.restTemplate.postForEntity(this.webhookUrl, this.createMessage(event), Void.class);
可以看到流程还是比较简单的，继承 AbstractStatusChangeNotifier 类，实现了 doNotify 方法，当应用状态改变的时候会回调 doNotify 方法。
实现钉钉通知
DingTalkNotifier.java
public class DingTalkNotifier extends AbstractStatusChangeNotifier {
    private final SpelExpressionParser parser = new SpelExpressionParser();
    private RestTemplate restTemplate = new RestTemplate();
    private String webhookToken;
    private String atMobiles;
    private String msgtype = "markdown";
    private String title = "服务告警";
    private Expression message;
    public DingTalkNotifier() {
        this.message = this.parser.parseExpression("**#{application.name}** (#{application.id}) is **#{to.status}**", ParserContext.TEMPLATE_EXPRESSION);
    @Override
    protected void doNotify(ClientApplicationEvent event) {
        this.restTemplate.postForEntity(this.webhookToken, this.createMessage(event), Void.class);
    private HttpEntity<Map<String, Object>> createMessage(ClientApplicationEvent event) {
        Map<String, Object> messageJson = new HashMap<>();
        HashMap<String, String> params = new HashMap<>();
        params.put("text", this.getMessage(event));
        params.put("title", this.title);
        messageJson.put("dinggroup", this.dingGroup);
        messageJson.put("atMobiles", this.atMobiles);
        messageJson.put("msgtype", this.msgtype);
        messageJson.put(this.msgtype, params);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
        return new HttpEntity<>(messageJson, headers);
    private String getAtMobilesString(String s) {
        StringBuilder atMobiles = new StringBuilder();
        String[] mobiles = s.split(",");
        for (String mobile : mobiles) {
            atMobiles.append("@").append(mobile);
        return atMobiles.toString();
    private String getMessage(ClientApplicationEvent event) {
        return this.atMobiles == null ? this.message.getValue(event, String.class) : this.message.getValue(event, String.class) + "\n >" + this.getAtMobilesString(this.atMobiles);
    public void setRestTemplate(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    public String getWebhookToken() {
        return webhookToken;
    public void setWebhookToken(String webhookToken) {
        this.webhookToken = webhookToken;
    public String getAtMobiles() {
        return atMobiles;
    public void setAtMobiles(String atMobiles) {
        this.atMobiles = atMobiles;
    public String getMsgtype() {
        return msgtype;
    public void setMsgtype(String msgtype) {
        this.msgtype = msgtype;
    public Expression getMessage() {
        return message;
    public void setMessage(String message) {
        this.message = this.parser.parseExpression(message, ParserContext.TEMPLATE_EXPRESSION);
    public String getTitle() {
        return title;
    public void setTitle(String title) {
        this.title = title;
代码逻辑也比较简单就不一一解释了。
增加钉钉通知自动配置
DingTalkNotifierConfiguration.java
@Configuration
@ConditionalOnProperty(
        prefix = "spring.boot.admin.notify.dingtalk",
        name = {"webhook-token"}
@AutoConfigureBefore({NotifierConfiguration.NotifierListenerConfiguration.class, NotifierConfiguration.CompositeNotifierConfiguration.class})
public class DingTalkNotifierConfiguration {
    public DingTalkNotifierConfiguration() {
    @Bean
    @ConditionalOnMissingBean
    @ConfigurationProperties(prefix = "spring.boot.admin.notify.dingtalk")
    public DingTalkNotifier dingTalkNotifier() {
        return new DingTalkNotifier();
大概解释下此配置类的主要作用：
当配置了 spring.boot.admin.notify.dingtalk.webhook-token 的时候此配置类生效。
将 spring.boot.admin.notify.dingtalk 下的配置注入到 DingTalkNotifier 生成的 Bean 中。
指定了此配置配生效的时间以及 Bean 生效的条件。
关键在于类和 Bean 上的几个注解，但这不是本文重点不展开说了。
增加相关配置
spring:
  boot:
    admin:
      notify:
        dingtalk: