RMI

public interface IPay extends Remote{
	String pay()throws RemoteException;
}


public class PayService extends UnicastRemoteObject implements IPay{
	private static final long serialVersionUID = -5725523341035516603L;

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

	@Override
	public String pay()throws RemoteException {
		return "支付成功,我们已通知卖家尽快为您发货!";
	}
	
}


//测试
IPay pay = new PayService();
		LocateRegistry.createRegistry(8080);
		Naming.bind("rmi://localhost:8080/doPay", pay);
		System.out.println("server start suc!");

//client

IPay pay = (IPay)Naming.lookup("rmi://127.0.0.1:8080/doPay");
		System.out.println(pay.pay());


console:
支付成功,我们已通知卖家尽快为您发货!