Java RMI 最简单实例

IHello.java

import java.rmi.Remote;

import java.rmi.RemoteException;

public interface IHello extends Remote{

    public void say() throws RemoteException;

}

Hello.java

import java.rmi.RemoteException;

import java.rmi.server.UnicastRemoteObject;

public class Hello extends UnicastRemoteObject implements IHello{

    private static final long serialVersionUID = 1L;

    protected Hello() throws RemoteException {

        super();

    }

    @Override

    public void say() throws RemoteException {

        System.out.println("Hello World");

    }

}

HelloServer.java

import java.rmi.Naming;

import java.rmi.RemoteException;

import java.rmi.registry.LocateRegistry;

import java.net.MalformedURLException;

public class HelloServer {

    public static void main(String[] args) {

        try {

            IHello h = new Hello();

            LocateRegistry.createRegistry(8888);

            Naming.rebind("rmi://localhost:8888/h", h);

        } catch (RemoteException e) {

            e.printStackTrace();

        } catch (MalformedURLException e) {

            e.printStackTrace();

        }

    }

}

HelloClient.java

import java.net.MalformedURLException;

import java.rmi.Naming;

import java.rmi.NotBoundException;

import java.rmi.RemoteException;

public class HelloClient {

    public static void main(String[] args) {

            try {

                IHello h = (IHello) Naming.lookup("rmi://localhost:8888/h");

                h.say();

            } catch (MalformedURLException | RemoteException | NotBoundException e) {

                e.printStackTrace();

            }

    }

}

先运行HelloServer类，再运行HelloClient类，即可在Console打印出字符串"Hello World"。

附：其实任何技术的HelloWorld实例都挺有意思的，因为十分地简洁。