java RMI

RMI入门

1.定义接口

package com.test.rmi;

 

import java.rmi.Remote;

import java.rmi.RemoteException;

 

public interface RMITest extends Remote {

long getPerfectTime()throws RemoteException;

 

}

 

2.实现接口，定义服务类

package com.test.rmi;

 

import java.rmi.Naming;

import java.rmi.RemoteException;

import java.rmi.server.UnicastRemoteObject;

 

public class RMITestImp extends UnicastRemoteObject implements RMITest {

 

protected RMITestImp() throws RemoteException {

super();

}

 

public long getPerfectTime() throws RemoteException {

return System.currentTimeMillis();

}

public static void main(String[] args) {

if(System.getSecurityManager()==null){

System.out.println("security manager");

System.setSecurityManager(new SecurityManager());

}

try {//创建远程对象的一个或多个实例

RMITestImp rt =new RMITestImp();

System.out.println("hello");

Naming.rebind("Hello", rt);//把hello注册到RMI注册服务器上，命名为Hello 

System.out.println("bind OK");

} catch (Exception e) {

}

}

 

}

3.定义客户端类

package com.test.rmi;

import java.net.MalformedURLException;

import java.rmi.Naming;

import java.rmi.NotBoundException;

import java.rmi.RemoteException;

public class RMIclient {

public RMIclient() {

super();

}

public static void main(String[] args) {

if(System.getSecurityManager()==null){

System.setSecurityManager(new SecurityManager());

}

try {

System.out.println("客户端开始");

RMITest t=(RMITest) Naming.lookup("Hello");//远程对象的引用

for(int i=0;i<10;i++){

System.out.println("time:"+t.getPerfectTime());

}

} catch (Exception e) {

e.printStackTrace();

} 

}

}

4工程在c:\RMI下，编译

cmd 下c:\>RMI -v1.1 com.test.rmi.RMITestImp 生成RMITestImp_Skel.class ，RMITestImp_Stub.class

5在c:\RMI目录下建立java.policy

  内容为 grant{

      permission java.security.AllPermission;

  };

6cmd下start rmiregistry启动RMI注册表

7c:\RMI>java -Djava.security.policy=java.policy com.test.rmi.RMITestImp

8 再打开一个dos窗口    c:\RMI>java -Djava.security.policy=java.policy com.test.rmi.RMIclient

参考： http://blog.youkuaiyun.com/wangxiaomei2008/archive/2008/04/22/2313977.aspx

          http://www.blogjava.net/zhenyu33154/articles/320245.html