RMI远程调用

• 服务端

接口

package org.zln.net;

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

/**
 * Created by sherry on 16/9/28.
 */
//1 必须继承Remote
public interface IRmiServer extends Remote{

    //2 必须抛出RemoteException异常
    public String sayHello(String name) throws RemoteException;

}

实现

package org.zln.net;

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

/**
 * Created by sherry on 16/9/28.
 */
public class RmiServerImpl extends UnicastRemoteObject implements IRmiServer {
    @Override
    public String sayHello(String name) throws RemoteException {
        return "Hello "+name;
    }


    /**
     * 因为UnicastRemoteObject的构造方法抛出了RemoteException异常，因此这里默认的构造方法必须写，必须声明抛出RemoteException异常
     * @throws RemoteException
     */
    public RmiServerImpl() throws RemoteException {
    }
}

注册

package org.zln.net;

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

/**
 * Created by sherry on 16/9/28.
 */
public class RmiServerMain {
    public static void main(String[] args) throws RemoteException, AlreadyBoundException, MalformedURLException {
        //创建一个远程对象
        IRmiServer iRmiServer = new RmiServerImpl();
        LocateRegistry.createRegistry(8888);
        Naming.bind("rmi://127.0.0.1:8888/IRmiServer",iRmiServer);
        System.out.println("远程对象绑定成功");
    }
}

这样，就把一个地址和一个远程对象进行了绑定

• 客户端

package org.zln.net;

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

/**
 * Created by sherry on 16/9/28.
 */
public class RmiClientMain {

    public static void main(String[] args) throws RemoteException, NotBoundException, MalformedURLException {
        IRmiServer iRmiServer = (IRmiServer) Naming.lookup("rmi://127.0.0.1:8888/IRmiServer");
        long s = new Date().getTime();

        for (int i = 0; i < 1000; i++) {
            System.out.println(iRmiServer.sayHello("张柳宁"));
        }

        long e = new Date().getTime();

        System.out.println("耗时:"+(e-s)+"毫秒");

    }
}

从一段地址上获取到远程对象，然后就可以像是本地创建出来的对象那样进行访问了