1：文件Service.java ServiceImpl.java ServiceServer.java ServiceClient.java  client.policy

结构
 src
    net.loocky.rmi/ *.java
    client.policy

文件如下：
Service.java是个interface
package net.loocky.rmi;

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

public interface Service extends Remote {

 public String getName() throws RemoteException;

 public void setName(String name) throws RemoteException;

}
ServiceImpl.java Service的实现
package net.loocky.rmi;

import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;

public class ServiceImpl extends UnicastRemoteObject implements Service {
 private static final long serialVersionUID = 1L;

 private String name;

 public ServiceImpl(String name) throws RemoteException {
  this.name = name;
 }

 public String getName() throws RemoteException {
  return name;
 }

 public void setName(String name) throws RemoteException {
  this.name = name;

 }

}

ServiceServer
package net.loocky.rmi;

import java.rmi.Naming;

public class ServiceServer {

 /**
  * @param args
  */
 public static void main(String[] args) {
  try {

   ServiceImpl s1 = new ServiceImpl("my name is john");
   ServiceImpl s2 = new ServiceImpl("my name is loocky");
   Naming.rebind("john", s1);
   Naming.rebind("loocky", s2);
   System.out.println("waiting for clients...");
  } catch (Exception e) {
   e.printStackTrace();
  }

 }

}
ServiceClient
package net.loocky.rmi;

import java.rmi.Naming;
import java.rmi.RMISecurityManager;

public class ServiceClient {

 /**
  * @param args
  */
 public static void main(String[] args) {
  System.setSecurityManager(new RMISecurityManager());
  String url = "rmi://127.0.0.1:1099/";
  try {
   Service s1 = (Service) Naming.lookup(url + "john");
   Service s2 = (Service) Naming.lookup(url + "loocky");
   System.out.println(s1.getName());
   s2.setName("my name is not loocky");
   System.out.println(s2.getName());

  } catch (Exception e) {
   e.printStackTrace();
  }
 }

}
client.policy
grant
{
  permission java.security.AllPermission;
//　permission java.net.SocketPermission　"127.0.0.1:1099","connect";
//　permission java.net.SocketPermission　"127.0.0.1:80","connect";
};

有了这些文件下面要做的事情是

1:进入bin/  rmic net.loocky.rmi.ServiceImpl 生成STUB
2：dos下面 rmiregistry
3：java net.loocky.rmi.ServiceServer
4: java -Djava.security.policy=client.policy net.loocky.rmi.ServiceClient
5:查看控制台的结果吧！