简介：

        一个简单的基于RMI的测试，RMI(Remote Method Invocation) 即 Java 远程方法调用，RMI 用于构建分布式应用程序，RMI 实现了 Java 程序之间跨 JVM 的远程通信。

一、客户端服务端都定义ClassDefine

public interface HelloDefine extends Remote {

    public String helloWorld() throws RemoteException;

    public String sayHello(String name) throws  RemoteException;
}

二、在服务端实现ClassDe

public class HelloDefineImp extends UnicastRemoteObject implements HelloDefine {

    private static final long serivalVersionUID = 1L;

    public HelloDefineImp() throws RemoteException{
        super();
    }

    public String helloWorld() throws RemoteException{
        return "Hello AlphaGo!";
    }

    public String sayHello(String name) throws RemoteException{
        return "Hello "+ name +" !";
    }
}

三、服务端配置

本地配置：

public class HelloServer {

    HelloDefine hello;

    public void server() throws RemoteException, MalformedURLException, AlreadyBoundException{

        hello = new HelloDefineImp();

        //远程对象注册实例
        LocateRegistry.createRegistry(8080);
        //bind绑定链接本地的URL
        Naming.bind("rmi://localhost:8080/Hello",hello);//本地
        System.out.println("server:对象绑定成功！");
    }
}

 远程配置：

因为Naming只能在本地用，用远程要用到Registry类。

public class HelloServer {

    HelloDefine hello;

    public void server() throws RemoteException, MalformedURLException, AlreadyBoundException{

        hello = new HelloDefineImp();

        Registry registry = LocateRegistry.createRegistry(8080);//在RMIServer上创建
        registry.rebind("HelloServer", hello); //HelloServer就是对外暴露出的名称</span></span>

        System.out.println("server:对象绑定成功！");
    }
}

四、客户端配置：

本地配置：

public class HelloClient {

    public HelloDefine hello;

    public void client() throws MalformedURLException, RemoteException, NotBoundException{

        hello = (HelloDefine) Naming.lookup("rmi://localhost:8080/Hello");
        //
        System.out.println("client:");
        System.out.println(hello.helloWorld());
        System.out.println(hello.sayHello("RhichardChan"));
    }
}

 远程配置：

public class HelloClient {

    public HelloDefine hello;

    public void client() throws MalformedURLException, RemoteException, NotBoundException{

        String hostName = "192.168.1.101";
        int port = 8080;
        Registry registry=LocateRegistry.getRegistry(hostName,port);
        hello = (HelloDefine) registry.lookup(   "HelloServer");
        System.out.println("client:");
        System.out.println(hello.helloWorld());
        System.out.println(hello.sayHello("RhichardChan"));
    }
}

五、测试

1、服务端运行：

public class RmiTest {

    @Test
    public void testServer() throws RemoteException, MalformedURLException, AlreadyBoundException{
        HelloServer server = new HelloServer();
        server.server();
        while (true);
    }

}

 服务器Running：

2、客户端运行：

public class RmiTest {

    @Test
    public void testClient() throws MalformedURLException,RemoteException, NotBoundException{
        HelloClient client = new HelloClient();
        client.client();

    }

}

客户端实现：