ADD file via upload

ServiceClientTest.java

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+package mxdx1;
+
+public class ServiceClientTest {
+    public static void main(String[] args) {
+        // 创建服务
+        UserService userService1 = new UserService("localhost", 8081);
+        UserService userService2 = new UserService("localhost", 8082);
+
+        // 创建客户端实现类
+        MyServiceClient client = new MyServiceClient();
+        client.subscribe("user-service");
+
+        // 启动服务
+        userService1.start();
+        userService2.start();
+
+        // 测试服务调用
+        System.out.println(client.invoke("user-service", "getUserInfo", "1001"));
+
+        // 停止一个用户服务
+        userService1.stop();
+        
+        // 再次调用，验证服务发现是否更新
+        System.out.println(client.invoke("user-service", "getUserInfo", "1001"));
+    }
+    
+    // ServiceClient 的具体实现类
+    static class MyServiceClient extends ServiceClient {
+        // 实现抽象类的具体子类
+    }
+}