// 遠(yuǎn)程接口定義
package rmi.server;

import java.rmi.Remote;
import java.rmi.RemoteException;

public interface Service extends Remote {
    public void hello() throws RemoteException;
    
    public void runThread(Runnable thread) throws RemoteException;
}

// 遠(yuǎn)程接口實(shí)現(xiàn)，main方法作為服務(wù)器
package rmi.server;

import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.rmi.RemoteException;
import java.rmi.server.RemoteStub;
import java.rmi.server.UnicastRemoteObject;
import java.security.Permission;

public class ServiceImpl implements Service {

    private RemoteStub stub;
    
    private int count;

    public ServiceImpl() throws RemoteException {
        stub = UnicastRemoteObject.exportObject(this);
        count = 0;
    }

    public void hello() throws RemoteException {
        System.out.println("Hello World: count = " + (++count));
    }

    public void runThread(Runnable thread) throws RemoteException {
        Thread t = new Thread(thread);
        t.start();
    }

    public RemoteStub getStub() {
        return stub;
    }

    public static void main(String[] args) {
        System.setProperty("java.rmi.server.ignoreStubClasses", "true");
        System.setProperty("java.rmi.server.codebase",
                "file:///E:\\\\bahamut\\\\JavaWorkspace\\\\rmiserver\\\\classes\\\\");
        if (System.getSecurityManager() == null) {
            System.setSecurityManager(new RMISecurityManager() {
                public void checkPermission(Permission p) {
                }
            });
        }
        try {
            ServiceImpl service = new ServiceImpl();
            Naming.rebind("service", service);
            System.out.println("Server ready");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

// 客戶端
package rmi.client;

import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.security.Permission;

import rmi.server.Service;

public class ServiceClient {

    /**
     * @param args
     */
    public static void main(String[] args) {
        System.setProperty("java.rmi.server.codebase",
        "file:///E:\\\\bahamut\\\\JavaWorkspace\\\\rmiclient\\\\classes\\\\");
        if (System.getSecurityManager() == null) {
            System.setSecurityManager(new RMISecurityManager() {
                public void checkPermission(Permission p) {
                }
            });
        }
        try {
            Service service = (Service) Naming.lookup("service");
            service.hello();
            Runnable runner = new Runner();
            service.runThread(runner);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

package rmi.client;

import java.io.Serializable;

public class Runner implements Runnable, Serializable {

    public void run() {
        System.out.println("i'm runner");
    }

}

服務(wù)器端生成stub并放在classpath中，codebase設(shè)置為能找到stub的路徑，運(yùn)行rmiregistry，
運(yùn)行服務(wù)器。

客戶端只需要Service類在classpath中，設(shè)置codebase為能找到Runner的路徑，運(yùn)行客戶端。
客戶端會(huì)從服務(wù)器下載stub，服務(wù)器會(huì)從客戶端下載Runner。Runner可以執(zhí)行任何操作甚至破壞
服務(wù)器上的數(shù)據(jù)。

多次運(yùn)行客戶端可以發(fā)現(xiàn)count在增長，也就是說對(duì)于export出的遠(yuǎn)程對(duì)象，狀態(tài)是始終保存的