遠程接口RmiHelloRemoteIntfc .java

import java.rmi.*;

public interface RmiHelloRemoteIntfc extends Remote
{
   String helloRemoteObj(String client) throws RemoteException;
}

遠程接口的實現類RmiHelloRemoteObj.java

import java.rmi.server.*;
import java.rmi.*;

public class RmiHelloRemoteObj extends UnicastRemoteObject implements RmiHelloRemoteIntfc
{

  public RmiHelloRemoteObj() throws RemoteException
  {
    super();
  }

  public String helloRemoteObj(String client) throws RemoteException
  {
     return "Hello World"+client;
  }

}

服務器類RmiHelloServer.java

import java.io.*;
import java.rmi.*;
import java.rmi.server.*;
import sun.applet.*;
import java.rmi.registry.LocateRegistry;

public class RmiHelloServer
{

  public RmiHelloServer()
  {
  }
  public static void main(String[] args)
  {
    //創建并安裝安全管理器
    if(System.getSecurityManager()==null)
    {
       System.setSecurityManager(new RMISecurityManager());
    }

    try{
         //創建遠程對象
         RmiHelloRemoteObj ttt=new RmiHelloRemoteObj();
         //啟動注冊表
         LocateRegistry.createRegistry(2222);
         //獎名稱綁定到對象
         Naming.rebind("http://Fangm:2222/helloObj",ttt);

         System.out.println("RMI服務器正在運行。。。。。。");
      }
      catch(Exception e)
      {
         e.printStackTrace();
      }

  }
}

服務器端的權限文件RmiHelloServer.policy

grant codeBase
"file:/e:/download/rmitest/"
{
 permission java.net.SocketPermission
      "*:1000-9999","accept,connect,listen,resolve";
};

現在就看看Client端是如何連接服務器和進行遠程方法的調用的吧

import java.rmi.*;
import java.rmi.server.*;

public class RmiHelloClient
{

  public RmiHelloClient()
  {
  }
  public static void main(String[] args)
  {
    //創建并安裝安全管理器
    if(System.getSecurityManager()==null)
    {
       System.setSecurityManager(new RMISecurityManager());
    }

    try{
          RmiHelloRemoteIntfc c1=(RmiHelloRemoteIntfc)Naming.lookup("rmi://Fangm:2222/helloObj");
          System.out.println(c1.helloRemoteObj("Everyone"));
    }
    catch(Exception e)
    {
       e.printStackTrace();
    }
    System.exit(0);

  }
}

Client端的權限文件RmiHelloClient.policy

grant codeBase
"file:/e:/download/rmitest/"
{
  permission java.net.SocketPermission
      "*:1000-9999","accept,connect,listen,resolve";
};

好了，一個最簡單的RMI例子就安無了，對了還少了最重要的一步，那就是編譯和運行呢？我們就來了個Bat或Cmd的批處理來進行吧，

看看RmiHello.bat吧

javac RmiHelloRemoteIntfc.java

javac RmiHelloRemoteObj.java

rmic RmiHelloRemoteObj

javac RmiHelloServer.java

javac RmiHelloClient.java

echo 在另一個窗口啟動服務器，請稍后。。。
start java  -Djava.security.policy=RmiHelloServer.policy RmiHelloServer

echo 運行客戶程序。。。
java -Djava.security.policy=RmiHelloClient.policy RmiHelloClient