RMI使用小例

package rmi;
 import java.rmi.RemoteException;


 public interface IAdd extends java.rmi.Remote{

 int add ( int a , int b ) throws RemoteException;  
}

package rmi;
import java.rmi.RemoteException;
 import java.rmi.registry.LocateRegistry;
 import java.rmi.registry.Registry;


 public class AddServer extends java.rmi.server.UnicastRemoteObject implements IAdd , Serializable{

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


 public int add ( int a ，int b ) throws RemoteException {

 return a+b ;
 }

 public static void main(String[] args) {

 try {     
 AddServer as = new AddServer();  
 Registry registry = LocateRegistry.createRegistry(2500);   
//  取名 add
            registry.bind("add", as);  
              //  提示服务端开启
                  System.out.println("AddServer Start...");  

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

package testdb;

 import java.net.MalformedURLException;
 import java.rmi.Naming;
 import java.rmi.NotBoundException;
 import java.rmi.RemoteException;
 import rmi.IAdd ;

 public class Test {

   public static void main(String[] args) {

 try {
 //  最后拼接的名字来自AddServer 类中取的名字。
 IAdd  add =  ( IAdd )Naming.lookup("rmi://127.0.0.1:2500/add");

 //  测试加法运算
 System.out.println( " a+b= " + add . add ( 2,3) );

 } catch (MalformedURLException e) {
 e.printStackTrace();
 } catch (RemoteException e) {
 e.printStackTrace();
 } catch (NotBoundException e) {
 e.printStackTrace();
 }   
      }
 }