我按照书上（Thinking in java）的例子
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.net.*;

public class PerfectTime 
    extends UnicastRemoteObject
    implements PerfectTimeI {
  // Implementation of the interface:
  public long getPerfectTime() 
      throws RemoteException {
    return System.currentTimeMillis();
  }
  // Must implement constructor 
  // to throw RemoteException:
  public PerfectTime() throws RemoteException {
    // super(); // Called automatically
  }
  // Registration for RMI serving:
  public static void main(String[] args) {
    System.setSecurityManager(
      new RMISecurityManager());
    try {
      PerfectTime pt = new PerfectTime();
      Naming.bind("//192.168.159.55:5555/PerfectTime", pt);
      System.out.println("Ready to do time");
    } catch(Exception e) {
      e.printStackTrace();
    }
  }
}
每次运行确提示下列错误？？？？
java.security.AccessControlException: access denied (java.net.SocketPermission 1
27.0.0.1:2005 connect,resolve)
        at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:270)
        at java.security.AccessController.checkPermission(AccessController.java:
401)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:542)
        at java.lang.SecurityManager.checkConnect(SecurityManager.java:1044)
        at java.net.Socket.connect(Socket.java:419)
        at java.net.Socket.connect(Socket.java:375)
        at java.net.Socket.(Socket.java:290)
        at java.net.Socket.(Socket.java:118)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirect
SocketFactory.java:22)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMaster
SocketFactory.java:122)
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:562)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185
)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
        at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:313)
        at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
        at java.rmi.Naming.rebind(Naming.java:159)
        at PerfectTime.main(PerfectTime.java:31)

参考
http://www.csdn.net/expert/topic/1066/1066983.xml?temp=.3834192
http://www.csdn.net/expert/topic/1056/1056604.xml?temp=.6995355
http://www.csdn.net/expert/topic/1087/1087441.xml?temp=.9314844

把security.policy，启动rmiregistry环境，传输方法贴出来