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标题: 高手指点,一个RMI应用程序的错误 [打印本页]

作者: wilson751 时间: 2004-09-13 00:25
标题: 高手指点,一个RMI应用程序的错误
高手指点：

我创建了一个RMI应用程序，调试出错，如下：
-------------------------------------------------------------------------------
在路径：E:\rmitest\com\prefect\pi下,三个.class文件的源代码如下：

PiRemote.java

package com.prefect.pi;

import java.rmi.*;

interface PiRemote extends Remote{
  double getPi() throws RemoteException;
}
-------------------------------------------------------------------------------
Pi.java

package com.prefect.pi;

import java.net.*;
import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.*;

public class Pi extends UnicastRemoteObject implements PiRemote{
  public double getPi() throws RemoteException{
return Math.PI;
  }

  public Pi() throws RemoteException{}

  public static void main(String[] args){
System.setSecurityManager(new RMISecurityManager());
try{
   Pi p = new Pi();
   Naming.bind("//Default:1010/pi",p);
}catch(Exception e){
   System.out.println("Error --- " + e.toString());
   e.printStackTrace();
}
  }
}

-------------------------------------------------------------------------------
OutputPi.java

package com.prefect.pi;

import java.rmi.*;
import java.rmi.registry.*;

public class OutputPi{
  public static void main(String[] args){
System.setSecurityManager(new RMISecurityManager());
try{
   PiRemote pr = (PiRemote) Naming.lookup("//Default:1010/Pi"

;
for(int i = 0; i < 10; i++)
System.out.println("

i = " + pr.getPi());
}catch(Exception e){
   System.out.println("Error --- " + e.toString());
   e.printStackTrace();
}
  }
}

----------------------------------------------------------------------------------------
以上三个文件编译通过，使用命令：rmic com.prefect.pi.Pi，生成Pi_Skel.class和Pi_Stub.class，
路径为：E:\rmitest\com\prefect\pi,和刚编译通过的三个类在同一文件夹下。并在此文件夹下建立：
policy.txt文件，内容如下：
----------------------------------------------------------------------------------------
grant{
permission java.security.AllPermission;
}
----------------------------------------------------------------------------------------

然后执行如下命令：

E:\rmitest>;java -Djava.rmi.server.codebase=com\prefect\pi\ -Djava.security.policy=com\prefe
t\pi\policy.txt com.prefect.pi.Pi
----------------------------------------------------------------------------------------
报错如下：

java.security.policy: 解析错误 file:/E:/J2ee/java%e9%a1%b9%e7%9b%ae%e5%ae%9e%e8
b7%b5/java%e9%a1%b9%e7%9b%ae%e5%ae%9e%e8%b7%b5/%e7%ac%94%e8%ae%b0%e5%8f%8a%e7%b
%83%e4%b9%a0/6/exercises/study21/day18/rmitest/com/prefect/pi/policy.txt：
      预期的 [;], 读取 [end of file]
Error --- java.security.AccessControlException: access denied (java.net.SocketP
rmission Default resolve)
java.security.AccessControlException: access denied (java.net.SocketPermission
efault resolve)
      at java.security.AccessControlContext.checkPermission(AccessControlCont
xt.java:269)
      at java.security.AccessController.checkPermission(AccessController.java
401)
      at java.lang.SecurityManager.checkPermission(SecurityManager.java:524)
      at java.lang.SecurityManager.checkConnect(SecurityManager.java:1023)
      at java.net.InetAddress.getAllByName0(InetAddress.java:1000)
      at java.net.InetAddress.getAllByName0(InetAddress.java:981)
      at java.net.InetAddress.getAllByName(InetAddress.java:975)
      at java.net.InetAddress.getByName(InetAddress.java:889)
      at java.net.InetSocketAddress.<init>;(InetSocketAddress.java:114)
      at java.net.Socket.<init>;(Socket.java:124)
      at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirec
SocketFactory.java:22)
      at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMaste
SocketFactory.java:12

      at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:562)
      at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:18
)
      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.bind(Unknown Source)
      at java.rmi.Naming.bind(Naming.java:111)
      at com.prefect.pi.Pi.main(Pi.java:19)

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