Question

是否有可能从JAR包中读取.policy文件？我发现this问题，但这里的链接已损坏，我尝试使用下面的代码，但它不起作用，我有异常（代码下面的异常消息）。我也尝试了this，结果相同

的java.policy

grant codeBase "file:${{java.ext.dirs}}/*" {
    permission java.security.AllPermission;
};

TelnetServer.java

package telnetserver;

import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.server.UnicastRemoteObject;

/**
 *
 * @author User
 */
public class TelnetServer extends UnicastRemoteObject implements RmiServer{

    private static final long serialVersionUID = 1L;

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

    public static void main(String[] args) {
        try {
            TelnetServer ts = new TelnetServer();
            String plik =  ts.getClass().getResource("java.policy").getFile();
            System.out.println(plik);
            System.setProperty("java.security.policy",plik);
            System.setSecurityManager(new java.rmi.RMISecurityManager());
            LocateRegistry.createRegistry(1087);
            Naming.rebind("//localhost:1087/TelnetServer", new TelnetServer());
            System.err.println("Serwer działa!");

        } catch (Exception e) {

            System.err.println("Złapano wyjątek: " + e.toString());
            e.printStackTrace();

        }
    }

    @Override
    public String execute(String login, String haslo, String cmd) throws RemoteException {
        return "Działa";
    }

}

异常

运行： /C:/Users/User/Documents/NetBeansProjects/TelnetServer/build/classes/telnetserver/java.policy Złapanoyjjątek：java.security.AccessControlException：访问被拒绝（“java.net.SocketPermission”“localhost：1087”“listen，resolve”） java.security.AccessControlException：访问被拒绝（“java.net.SocketPermission”“localhost：1087”“listen，resolve”）at java.security.AccessControlContext.checkPermission（AccessControlContext.java:472）在 java.security.AccessController.checkPermission（AccessController.java:884）在 java.lang.SecurityManager.checkPermission（SecurityManager.java:549）在java.lang.SecurityManager.checkListen（SecurityManager.java:1131）在java.net.ServerSocket.bind（ServerSocket.java:374）at java.net.ServerSocket。（ServerSocket.java:237）at java.net.ServerSocket。（ServerSocket.java:128）at sun.rmi.transport.proxy.RMIDirectSocketFactory.createServerSocket（RMIDirectSocketFactory.java:45）在 sun.rmi.transport.proxy.RMIMasterSocketFactory.createServerSocket（RMIMasterSocketFactory.java:345）在 sun.rmi.transport.tcp.TCPEndpoint.newServerSocket（TCPEndpoint.java:666） at sun.rmi.transport.tcp.TCPTransport.listen（TCPTransport.java:330）在 sun.rmi.transport.tcp.TCPTransport.exportObject（TCPTransport.java:249）在 sun.rmi.transport.tcp.TCPEndpoint.exportObject（TCPEndpoint.java:411）在sun.rmi.transport.LiveRef.exportObject（LiveRef.java:147）at sun.rmi.server.UnicastServerRef.exportObject（UnicastServerRef.java:234）在sun.rmi.registry.RegistryImpl.setup（RegistryImpl.java:195）at sun.rmi.registry.RegistryImpl。（RegistryImpl.java:180）at java.rmi.registry.LocateRegistry.createRegistry（LocateRegistry.java:203）在telnetserver.TelnetServer.main（TelnetServer.java:32）

JAR包中的策略文件

0 个答案: