我的RMI实践

核心提示：//: c15:rmi:PerfectTime.java// From 'Thinking in Java, 2nd ed.' by BrUCe Eckel// www.BruceEckel.com. See copyright notice in CopyRight.txt.// The implem

　　//: c15:rmi:PerfectTime.java
　　// From 'Thinking in Java, 2nd ed.' by BrUCe Eckel
　　// www.BruceEckel.com. See copyright notice in CopyRight.txt.
　　// The implementation of
　　// the PerfectTime remote object.
　　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. Throw
　　// exceptions out to the console.
　　public static void main(String[] args) throws Exception {
　　PerfectTime pt = new PerfectTime();
　　Naming.rebind("/PerfectTime", pt);
　　System.out.PRintln("Ready to do time");
　　}
　　} ///:~
　　//: c15:rmi:PerfectTimeI.java
　　// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
　　// www.BruceEckel.com. See copyright notice in CopyRight.txt.
　　// The PerfectTime remote interface.
　　import java.rmi.*;
　　
　　interface PerfectTimeI extends Remote {
　　long getPerfectTime() throws RemoteException;
　　} ///:~
　　//: c15:rmi:DisplayPerfectTime.java
　　// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
　　// www.BruceEckel.com. See copyright notice in CopyRight.txt.
　　// Uses remote object PerfectTime.
　　import java.rmi.*;
　　import java.rmi.registry.*;
　　
　　public class DisplayPerfectTime {
　　public static void main(String[] args)
　　throws Exception {
　　System.setSecurityManager(
　　new RMISecurityManager());
　　PerfectTimeI t = (PerfectTimeI)Naming.lookup("/PerfectTime");
　　for(int i = 0; i < 10; i++)
　　System.out.println("Perfect time = " +
　　t.getPerfectTime());
　　}
　　} ///:~
　　grant {
　　// Allow everything for now
　　permission java.security.AllPermission;
　　};
　　
　　存入于F:\rmi下
　　操作步骤
　　F:\rmi>java PerfectTime
　　Ready to do time
　　F:\rmi>javac *.java
　　F:\rmi>rmic PerfectTime
　　F:\rmi>start rmiregistry
　　F:\rmi>java PerfectTime
　　Ready to do time
　　另开一DOS窗口
　　F:\rmi>java -Djava.security.policy=registerit.policy DisplayPerfectTime
　　Perfect time = 1011585443953
　　Perfect time = 1011585443968
　　Perfect time = 1011585444000
　　Perfect time = 1011585444000
　　Perfect time = 1011585444015
　　Perfect time = 1011585444031
　　Perfect time = 1011585444031
　　Perfect time = 1011585444046
　　Perfect time = 1011585444062
　　Perfect time = 1011585444062
　　注重：假如在rmic PerfectTime时报找不到PerfectTime类，请在环境变量中的ClassPath中加入：F:\rmi