Java RMI实现

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1. 定义一个远程接口

public interface IService extends Remote{
    public String queryName(String no) throws RemoteException;
}

2. 实现远程的接口

public class ServiceImpl extends UnicastRemoteObject implements IService {


    private static final long serialVersionUID = 1L;

    protected ServiceImpl() throws RemoteException {
    }

    @Override
    public String queryName(String no) throws RemoteException {
        //方法的具体实现
        System.out.println("hello "+ no);
        return String.valueOf(System.currentTimeMillis());
    }
}

3. RMI服务器端程序

public class Server {

    public static void main(String[] args) {
        //注册管理器
        Registry registry = null;
        try {
            //创建一个服务注册管理器
            registry = LocateRegistry.createRegistry(8088);
            System.out.println("registry");
        } catch (RemoteException e) {
            e.printStackTrace();
        }
        try {
            //创建一个服务
            ServiceImpl service = new ServiceImpl();

            //将服务绑定命名
            registry.rebind("vince",service);
            System.out.println("bind server");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

4. RMI客户端调用程序

public class Client {
    public static void main(String[] args) {
        //注册管理器
        Registry registry = null;
        try {
            //获取服务注册管理器
            registry = LocateRegistry.getRegistry("localhost",8088);
            //列出所有注册的服务
            String[] list = registry.list();
            for (String s : list){
                System.out.println(s);
            }
        } catch (RemoteException e) {
            e.printStackTrace();
        }
        try {
            //根据命名获取服务
            IService service = (IService) registry.lookup("vince");
            //调用远程方法
            String result = service.queryName("jack");
            //输出调用结果
            System.out.println("result from remote : "+result);
        } catch (RemoteException e) {
            e.printStackTrace();
        } catch (NotBoundException e) {
            e.printStackTrace();
        }

    }
}