diff --git a/spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service/src/main/java/com/tencent/cloud/polaris/discovery/service/caller/SpringEventOrderListener.java b/spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service/src/main/java/com/tencent/cloud/polaris/discovery/service/caller/SpringEventOrderListener.java
index d59412424..1bd0e4dd5 100644
--- a/spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service/src/main/java/com/tencent/cloud/polaris/discovery/service/caller/SpringEventOrderListener.java
+++ b/spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service/src/main/java/com/tencent/cloud/polaris/discovery/service/caller/SpringEventOrderListener.java
@@ -10,7 +10,7 @@ public class SpringEventOrderListener implements ApplicationListener {
 
 	@Override
 	public void onApplicationEvent(ApplicationEvent event) {
-		switch (event.getClass().getSimpleName()){
+		switch (event.getClass().getSimpleName()) {
 			case "ApplicationStartingEvent":
 				System.out.println("事件ApplicationStartingEvent");
 				break;
@@ -30,13 +30,13 @@ public class SpringEventOrderListener implements ApplicationListener {
 				System.out.println("事件ApplicationStartedEvent");
 				break;
 			case "ServletWebServerInitializedEvent":
-				if( event instanceof WebServerInitializedEvent){
+				if (event instanceof WebServerInitializedEvent) {
 					System.out.println("事件WebServerInitializedEvent");
 				}
-				if( event instanceof ServletWebServerInitializedEvent){
+				if (event instanceof ServletWebServerInitializedEvent) {
 					System.out.println("事件ServletWebServerInitializedEvent");
 				}
-				if( event instanceof ReactiveWebServerInitializedEvent){
+				if (event instanceof ReactiveWebServerInitializedEvent) {
 					System.out.println("事件ReactiveWebServerInitializedEvent");
 				}
 				break;