网关进行优化，增加日志

src/main/java/com/sczx/gateway/config/DynamicRouteConfig.java

@@ -41,6 +41,8 @@ public class DynamicRouteConfig implements RouteDefinitionLocator {
     // 最小刷新间隔（毫秒）
     private static final long MIN_REFRESH_INTERVAL = 3000;
 
+    private static final URI DEFAULT_URI = URI.create("http://localhost");
+
     @Override
     public Flux<RouteDefinition> getRouteDefinitions() {
         long currentTime = System.currentTimeMillis();
@@ -99,7 +101,9 @@ public class DynamicRouteConfig implements RouteDefinitionLocator {
     @EventListener
     public void onRefreshRoutes(RefreshRoutesEvent event) {
         long count = refreshCount.get();
-        log.info("接收到路由刷新事件，当前为第{}次刷新", count);
+        log.info("接收到路由刷新事件，当前为第{}次刷新, JVM内存使用: {}/{}", count,
+                Runtime.getRuntime().freeMemory(),
+                Runtime.getRuntime().totalMemory());
     }
 
     /**
@@ -118,7 +122,7 @@ public class DynamicRouteConfig implements RouteDefinitionLocator {
         List<ServiceInstance> instances = discoveryClient.getInstances(serviceName);
         if (instances == null || instances.isEmpty()) {
             log.warn("No available instances for service: {}, returning default URI", serviceName);
-            return URI.create("http://localhost");
+            return DEFAULT_URI;
         }
         int idx = index.getAndIncrement() & Integer.MAX_VALUE;
         ServiceInstance selected = instances.get(idx % instances.size());