RMI远程调用

温故而知新可以为师矣

1.远程接口

package com.example.rmi;

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


public interface IService extends Remote {
    String sayHello() throws RemoteException;
    String sayHello(String name) throws RemoteException;
    HelloImpl.User getUser() throws RemoteException;
}

2.远程接口实现类

package com.example.rmi;

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


public class HelloImpl extends UnicastRemoteObject implements IService {

    public HelloImpl() throws RemoteException  {
    }

    @Override public String sayHello() {
        return "hello bruce.";
    }

    @Override public String sayHello(String name) {
        return name;
    }

    @Override public User getUser() throws RemoteException {
        return new User("bruce",30);
    }

    public static class User implements Serializable{
        public String name;
        public int age;

        public User(String name, int i) {
            this.name= name;
            this.age= i;
        }
        public String toString(){
            return this.name+":"+this.age;
        }
    }
}

3.注册远程服务接口

  package com.example.rmi;

import java.net.MalformedURLException;
import java.rmi.AlreadyBoundException;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;

public class Server {
    public static void main(String[] args) throws RemoteException, AlreadyBoundException, MalformedURLException {
        IService service= new HelloImpl();
        LocateRegistry.createRegistry(8888);
        Naming.bind("rmi://localhost:8888/r_hello",service);
    }
}

4.远程客户端调用

package com.example.rmi;

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

public class Client {
    public static void main(String[] args) throws RemoteException, NotBoundException, MalformedURLException {
        IService iService= (IService) Naming.lookup("rmi://localhost:8888/r_hello");
        System.out.println(iService.sayHello());
        System.out.println(iService.sayHello("成功啦"));
        HelloImpl.User user= iService.getUser();
        System.out.println((user));
    }
}