访问被拒绝（当我在 NetBeans 中运行我的客户端项目时发生“java.net.SocketPermission”错误
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Access denied ("java.net.SocketPermission" Error Occurred when i run my CLient Project in NetBeans
提问by user3125051
java.security.AccessControlException: access denied ("java.net.SocketPermission" "127.0.0.1:1099" "connect,resolve")
java.security.AccessControlException: 访问被拒绝 ("java.net.SocketPermission" "127.0.0.1:1099" "connect,resolve")
My server side is working perfectly, no errors on the server.. while when I run my client code, I get this access denied ("java.net.SocketPermission" "127.0.0.1:1099" "connect,resolve") error.
我的服务器端工作正常，服务器上没有错误......而当我运行我的客户端代码时，我收到此访问被拒绝（“java.net.SocketPermission”“127.0.0.1:1099”“connect,resolve”）错误。
Please, any expert help me :(
请任何专家帮助我:(
This is my client code
这是我的客户端代码
/**
*
* @author saqibhussain
*/
public class ChatClient extends UnicastRemoteObject implements ChatClientIF, Runnable {
public ChatClient() throws RemoteException {
}
private ChatServerIF chat;
private String name = null;
protected ChatClient(String name, ChatServerIF chat) throws RemoteException { this.name = name;
this.chat = chat;
chat.RegisterChatClient(this);
}
public void retrieveMessage(String msg) throws RemoteException {
System.out.println(msg);
}
public void run() {
Scanner scaner = new Scanner(System.in);
String message;
while (true) {
try {
message = scaner.nextLine();
chat.broadcastMessage(name + " : " + message);
} catch (RemoteException ex) {
Logger.getLogger(ChatClient.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
public static void main(String[] args) throws NotBoundException, MalformedURLException, RemoteException {
System.setSecurityManager(new RMISecurityManager());
try {
String url = "rmi://localhost/RMIChatServer";
ChatServerIF remoteObject = (ChatServerIF) Naming.lookup(url);
System.out.println("Got remote object");
new Thread(new ChatClient(args[0], remoteObject)).start();
} catch (Exception e) {
System.out.println(e);
}
}
}
回答by user207421
You've defined a SecurityManagerbut you haven't granted yourself enough permissions to execute your code. You need to write yourself a policy fileand specify it to the JVM when starting via -Djava.security.policy=....
您已经定义了 aSecurityManager但您还没有授予自己足够的权限来执行您的代码。您需要自己编写一个策略文件，并在通过-Djava.security.policy=....
Or, just remove the security manager. You don't need it unless you're using the RMI Codebase feature.
或者，只需删除安全管理器。除非您使用 RMI 代码库功能，否则您不需要它。
回答by Diversity
Add a security policy to your client application. You can download a sample policy from here: http://www.comp.lancs.ac.uk/~weerasin/csc253/tutorials/week8code/client.policy
向您的客户端应用程序添加安全策略。您可以从这里下载示例政策：http: //www.comp.lancs.ac.uk/~weerasin/csc253/tutorials/week8code/client.policy
After that start your client with the following vm argument
之后，使用以下 vm 参数启动您的客户端
java -Djava.security.policy==client.policy
Be carefull in production environments since the given policy grants permission to any operation performed by your client.
在生产环境中要小心，因为给定的策略授予客户端执行的任何操作的权限。
