[英]Client, server and rmi don't work
此代碼不起作用。 好吧,它有效,但客戶端不打印。 難道我做錯了什么? 我正在使用 W7 和 NetBeans。 有沒有辦法查看 rmiregistry 是否正常? 如果我刪除這些捕獲,我將無法編譯它。 我很確定問題來自重新綁定和查找。
ServerNew.java:
interface C extends Remote
{
public String now() throws RemoteException ;
}
class Server extends UnicastRemoteObject implements C
{
public String now() throws RemoteException
{
return "99:99";
}
Server() throws RemoteException
{
}
}
public class ServerNew
{
public static void main(String[] args) throws Exception
{
Server server=new Server();
System.setSecurityManager(new java.rmi.RMISecurityManager());
LocateRegistry.createRegistry(1099);
Naming.rebind("rmi://localhost:1099/time", server);
}
}
ClientNew.java:
interface C extends Remote
{
public String now() throws RemoteException ;
}
public class ClientNew
{
public static void main(String[] args) throws Exception
{
C server=(C) Naming.lookup("rmi://localhost:1099/time");
String text=server.now();
System.out.println(text);
}
}
服務器的輸出( ServerNew.java:38
是Naming.rebind
):
Exception in thread "main" java.security.AccessControlException: access denied ("java.net.SocketPermission" "127.0.0.1:1099" "connect,resolve")
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366)
at java.security.AccessController.checkPermission(AccessController.java:555)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1051)
at java.net.Socket.connect(Socket.java:574)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:208)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Naming.java:177)
at servernew.ServerNew.main(ServerNew.java:38)
Exception in thread "RMI TCP Connection(idle)" java.security.AccessControlException: access denied ("java.net.SocketPermission" "127.0.0.1:61881" "accept,resolve")
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366)
at java.security.AccessController.checkPermission(AccessController.java:555)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at java.lang.SecurityManager.checkAccept(SecurityManager.java:1174)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.checkAcceptPermission(TCPTransport.java:654)
at sun.rmi.transport.tcp.TCPTransport.checkAcceptPermission(TCPTransport.java:293)
at sun.rmi.transport.Transport$1.run(Transport.java:176)
at sun.rmi.transport.Transport$1.run(Transport.java:174)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
通過這種異常處理,任何人都無法回答您的問題。 我建議您修復它並提供正在拋出的異常。 到目前為止,您發布的內容完全沒有意義,不應該寫。
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