java - 如何在java中测试RMI程序

Question

当我试图实现我的第一个 RMI 程序时，我在测试它时遇到了麻烦。

我编译了我的程序并尝试启动我的服务器，但随后出现错误。

关于我的服务器：1 个接口 + 1 个实现它的类 + 我的服务器类

• 界面

  package src;
  import java.rmi.*;
  public interface Information extends Remote {
  
  // methods than can be called remotly
  
  public String getInformation() throws RemoteException;
  
  }
  

• 类实现它

  package src;
  import java.rmi.server.UnicastRemoteObject;
  import java.rmi.RemoteException;
  
  public class InformationImpl extends UnicastRemoteObject implements Information {
  
  protected InformationImpl() throws RemoteException {
      super();
  }
  
  public String getInformation() throws RemoteException {
      System.out.println("method getInformation()");
      return "hello";
  }
  }
  

• 我的服务器类：

  package src;
  
  import java.net.InetAddress;
  import java.net.MalformedURLException;
  import java.net.UnknownHostException;
  import java.rmi.Naming;
  import java.rmi.RemoteException;
  import java.rmi.registry.LocateRegistry;
  
  public class LanceServeur {
  
    public static void main(String[] args) {
     try {
       LocateRegistry.createRegistry(1099);
       InformationImpl informationImpl = new InformationImpl();
       Naming.rebind("MyServer", informationImpl);
       System.out.println("Server launched");
     } 
  
     catch (Exception e) {
       e.printStackTrace();
     }
    }
   }
  

• 我的客户班：

   package src;
  
  import java.net.MalformedURLException;
  import java.rmi.Naming;
  import java.rmi.NotBoundException;
  import java.rmi.Remote;
  import java.rmi.RemoteException;
  
  public class lanceClient {
  
  public static void main(String[] args) {
     System.out.println("Lancement du client");
     try {
       Remote r = Naming.lookup("rmi://localhost:1099/TestRMI");
       System.out.println(r);
       if (r instanceof Information) {
          String s = ((Information) r).getInformation();
          System.out.println("chaine renvoyee = " + s);
       }
     } catch (MalformedURLException e) {
       e.printStackTrace();
     } catch (RemoteException e) {
       e.printStackTrace();
     } catch (NotBoundException e) {
       e.printStackTrace();
     }
     System.out.println("end of client");
    }
   }
  

如果您想查看正确的行，请查看我的 github，这更容易： https ://github.com/TLprojet/MUD_Java

关于错误，这里是：

java.rmi.ConnectIOException: Exception creating connection to: 0.0.21.214; nested exception is: 
    java.net.SocketException: Invalid argument or cannot assign requested address
    at java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:631)
    at java.rmi/sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:209)
    at java.rmi/sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:196)
    at java.rmi/sun.rmi.server.UnicastRef.newCall(UnicastRef.java:338)
    at java.rmi/sun.rmi.registry.RegistryImpl_Stub.rebind(RegistryImpl_Stub.java:147)
    at java.rmi/java.rmi.Naming.rebind(Naming.java:177)
    at src.LanceServeur.main(LanceServeur.java:16)
Caused by: java.net.SocketException: Invalid argument or cannot assign requested address
    at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
    at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
    at java.base/java.net.Socket.connect(Socket.java:591)
    at java.base/java.net.Socket.connect(Socket.java:540)
    at java.base/java.net.Socket.<init>(Socket.java:436)
    at java.base/java.net.Socket.<init>(Socket.java:213)
    at java.rmi/sun.rmi.transport.tcp.TCPDirectSocketFactory.createSocket(TCPDirectSocketFactory.java:40)
    at java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
    ... 6 more

标签： javarmi