diff --git a/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java b/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java
index 144185902..c22fb644c 100644
--- a/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java
+++ b/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java
@@ -1,49 +1,49 @@
-/*
- * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
- *
- * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- *
- */
-
-package com.tencent.cloud.polaris.router.grayrelease.gateway;
-
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.core.env.Environment;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestHeader;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-@RequestMapping("/router/gray")
-public class GatewayController {
-
-	@Autowired
-	private Environment environment;
-
-	@Autowired
-	private RouterService routerService;
-
-	/**
-	 * Get information of callee.
-	 * @return information of callee
-	 */
-	@GetMapping("/route_rule")
-	public String routeRule(@RequestHeader("uid") int userId) {
-		String appName = environment.getProperty("spring.application.name");
-		String resp = routerService.restByUser(userId);
-		return appName + " -> " + resp;
-	}
-
-}
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.grayrelease.gateway;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/router/gray")
+public class GatewayController {
+
+	@Autowired
+	private Environment environment;
+
+	@Autowired
+	private RouterService routerService;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/route_rule")
+	public String routeRule(@RequestHeader("uid") int userId) {
+		String appName = environment.getProperty("spring.application.name");
+		String resp = routerService.restByUser(userId);
+		return appName + " -> " + resp;
+	}
+  
+}