我正在尝试使用here的教程构建客户端 - 服务器关系。我的服务器类在我的路径的引擎包中:/ home / rozerin / IdeaProjects / computetest / src / main / java / engine和client,接口包也在〜/ main / java包中。 就像之前关于这个问题的问题中所建议的那样,我在策略文件中以“/”结束了我的目录以获得权限,但是它没有用。现在,我的策略文件位于引擎文件夹中。 我正在使用Intellij Idea进行编译,但我没有使用IDE,因为我正在尝试从ubuntu中的命令行构建服务器。我不知道出了什么问题,我在这一点上非常困难。
我的命令行参数如下;
java -cp /home/rozerin/IdeaProjects/computetest/src/main/java:/home/rozerin/Public/public_html/classes/compute.jar -Djava.rmi.server.codebase = http://mycomputer/home/rozerin/IdeaProjects/computetest/src/main/java/compute.jar - Djava.rmi.server.hostname = mycomputer.example.com -Djava.security.policy = server.policy engine / ComputeEngine
我的客户端类如下;
package client;
/**
* Created by rozerin on 08.03.2016.
*/
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.math.BigDecimal;
import compute.Compute;
public class ComputePi {
public static void main(String args[]) {
if (System.getSecurityManager() == null) {
System.setSecurityManager(new SecurityManager());
}
try {
String name = "Compute";
Registry registry = LocateRegistry.getRegistry(args[0]);
Compute comp = (Compute) registry.lookup(name);
Pi task = new Pi(Integer.parseInt(args[1]));
BigDecimal pi = comp.executeTask(task);
System.out.println(pi);
} catch (Exception e) {
System.err.println("ComputePi exception:");
e.printStackTrace();
}
}
}
我的服务器类如下;
package engine;
/**
* Created by rozerin on 08.03.2016.
*/
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;
import compute.Compute;
import compute.Task;
public class ComputeEngine implements Compute {
public ComputeEngine() {
super();
}
public <T> T executeTask(Task<T> t) {
return t.execute();
}
public static void main(String[] args) {
if (System.getSecurityManager() == null) {
System.setSecurityManager(new SecurityManager());
}
try {
String name = "Compute";
Compute engine = new ComputeEngine();
Compute stub =
(Compute) UnicastRemoteObject.exportObject(engine, 0);
Registry registry = LocateRegistry.getRegistry();
registry.rebind(name, stub);
System.out.println("ComputeEngine bound");
} catch (Exception e) {
System.err.println("ComputeEngine exception:");
e.printStackTrace();
}
}
}
我的政策文件是
grant codeBase“file:/ home / rozerin / IdeaProjects / computetest / src / main / java /”{ permission java.security.AllPermission; };
堆栈跟踪是;
ComputeEngine异常: java.security.AccessControlException:拒绝访问(“java.net.SocketPermission”“127.0.0.1:1099”“connect,resolve”) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:474) 在java.security.AccessController.checkPermission(AccessController.java:685) 在java.lang.SecurityManager.checkPermission(SecurityManager.java:549) 在java.lang.SecurityManager.checkConnect(SecurityManager.java:1051) 在java.net.Socket.connect(Socket.java:574) 在java.net.Socket.connect(Socket.java:528) 在java.net.Socket。(Socket.java:425) 在java.net.Socket。(Socket.java:208) at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40) at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:147) at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613) at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216) at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202) at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:341) at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source) 在engine.ComputeEngine.main(ComputeEngine.java:33)
“at engine.ComputeEngine.main(ComputeEngine.java:33)”是它使用服务器类的重新绑定方法的地方。
界面在我分享的网站上,我不想让这个地方太过浓密。任何帮助将非常感激。谢谢!
答案 0 :(得分:0)
对于服务器端和客户端,两者都应该使用:
System.setProperty("java.security.policy", "path_to_your_Security_policy_file_located_in_file_system");
System.setSecurityManager(new RMISecurityManager());
安全策略文件应包含
grant {
permission java.security.AllPermission;
};
我认为这可能会帮助你。