/**
* Created by IntelliJ IDEA.
* User: leizhimin
* Date: 2008-8-7 21:50:02
* 定義一個遠程接口，必須繼承Remote接口，其中需要遠程調用的方法必須拋出RemoteException異常
*/
public interface IHello extends Remote {

???? /**
???? * 簡單的返回“Hello World！"字樣
???? * @return 返回“Hello World！"字樣
???? * @throws java.rmi.RemoteException
???? */
???? public String helloWorld() throws RemoteException;

???? /**
???? * 一個簡單的業務方法，根據傳入的人名返回相應的問候語
???? * @param someBodyName??人名
???? * @return 返回相應的問候語
???? * @throws java.rmi.RemoteException
???? */
???? public String sayHelloToSomeBody(String someBodyName) throws RemoteException;
}

/**
* Created by IntelliJ IDEA.
* User: leizhimin
* Date: 2008-8-7 21:56:47
* 遠程的接口的實現
*/
public class HelloImpl extends UnicastRemoteObject implements IHello {
???? /**
???? * 因為UnicastRemoteObject的構造方法拋出了RemoteException異常，因此這里默認的構造方法必須寫，必須聲明拋出RemoteException異常
???? *
???? * @throws RemoteException
???? */
???? public HelloImpl() throws RemoteException {
????}

???? /**
???? * 簡單的返回“Hello World！"字樣
???? *
???? * @return 返回“Hello World！"字樣
???? * @throws java.rmi.RemoteException
???? */
???? public String helloWorld() throws RemoteException {
???????? return "Hello World!" ;
????}

???? /**
???? * 一個簡單的業務方法，根據傳入的人名返回相應的問候語
???? *
???? * @param someBodyName 人名
???? * @return 返回相應的問候語
???? * @throws java.rmi.RemoteException
???? */
???? public String sayHelloToSomeBody(String someBodyName) throws RemoteException {
???????? return "你好，" + someBodyName + "!" ;
????}
}

/**
* Created by IntelliJ IDEA.
* User: leizhimin
* Date: 2008-8-7 22:03:35
* 創建RMI注冊表，啟動RMI服務，并將遠程對象注冊到RMI注冊表中。
*/
public class HelloServer {
???? public static void main(String args[]) {

???????? try {
???????????? //創建一個遠程對象
????????????IHello rhello = new HelloImpl();
???????????? //本地主機上的遠程對象注冊表Registry的實例，并指定端口為8888，這一步必不可少（Java默認端口是1099），必不可缺的一步，缺少注冊表創建，則無法綁定對象到遠程注冊表上
????????????LocateRegistry.createRegistry(8888);

???????????? //把遠程對象注冊到RMI注冊服務器上，并命名為RHello
???????????? //綁定的URL標準格式為：rmi://host:port/name(其中協議名可以省略，下面兩種寫法都是正確的）
????????????Naming.bind( "rmi: //localhost:8888/RHello",rhello);
//????????????Naming.bind("http://localhost:8888/RHello",rhello);

????????????System.out.println( ">>>>>INFO:遠程IHello對象綁定成功！" );
????????} catch (RemoteException e) {
????????????System.out.println( "創建遠程對象發生異常！" );
????????????e.printStackTrace();
????????} catch (AlreadyBoundException e) {
????????????System.out.println( "發生重復綁定對象異常！" );
????????????e.printStackTrace();
????????} catch (MalformedURLException e) {
????????????System.out.println( "發生URL畸形異常！" );
????????????e.printStackTrace();
????????}
????}
}

/**
* Created by IntelliJ IDEA.
* User: leizhimin
* Date: 2008-8-7 22:21:07
* 客戶端測試，在客戶端調用遠程對象上的遠程方法，并返回結果。
*/
public class HelloClient {
???? public static void main(String args[]){
???????? try {
???????????? //在RMI服務注冊表中查找名稱為RHello的對象，并調用其上的方法
????????????IHello rhello =(IHello) Naming.lookup( "rmi: //localhost:8888/RHello");
????????????System.out.println(rhello.helloWorld());
????????????System.out.println(rhello.sayHelloToSomeBody( "熔巖" ));
????????} catch (NotBoundException e) {
????????????e.printStackTrace();
????????} catch (MalformedURLException e) {
????????????e.printStackTrace();
????????} catch (RemoteException e) {
????????????e.printStackTrace();??
????????}
????}
}