示例代码

import java.rmi.Naming;
import java.rmi.registry.LocateRegistry;

public class RMIServer {
    public static void main(String[] args) throws Exception {
        System.setProperty("java.rmi.server.hostname", "159.138.23.173");
        RemoteHello h = new RemoteHello();
        LocateRegistry.createRegistry(1099);
        Naming.bind("rmi://0.0.0.0:1099/hello", h);
    }
}

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

public class RemoteHello extends UnicastRemoteObject implements IRemoteHello {

    protected RemoteHello() throws RemoteException{
    }

    public String hello()  throws RemoteException {
        String sysinfo = "";
        System.out.println("GET A RMI CALL!");
        System.out.println(System.getProperty("user.dir"));
        sysinfo = System.getProperty("user.dir");
        return sysinfo;
    }
}

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

public interface IRemoteHello extends Remote {
    public String hello() throws RemoteException;
}

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

public class RMIClient {
    public static void main(String[] args) throws RemoteException, MalformedURLException, NotBoundException {
//        IRemoteHello hello = (IRemoteHello) Naming.lookup("rmi://127.0.0.1:1099/hello");
        IRemoteHello hello = (IRemoteHello) Naming.lookup("rmi://159.138.23.173:1099/hello");
        String ret = hello.hello();
        System.out.println(ret);
    }
}