Java RMI Tutorial - AccessControlException: access deny (java.io.FilePermission
昨天我试图开始使用Java RMI。我找到了这个sun教程(http://java.sun.com/docs/books/tutorial/rmi/index.html),并从服务器预制开始。但是每次我启动 pogram(rmiregistry 正在运行)时,我都会得到一个包含以下 StackTrace 的 AccessControlException:
LoginImpl exception:
java.security.AccessControlException: access denied (java.io.FilePermission \\\C\ProjX\server\serverProj\bin\usermanager read)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
at java.io.File.exists(File.java:700)
at sun.net.www.protocol.file.Handler.openConnection(Handler.java:80)
at sun.net.www.protocol.file.Handler.openConnection(Handler.java:55)
at java.net.URL.openConnection(URL.java:943)
at sun.rmi.server.LoaderHandler.addPermissionsForURLs(LoaderHandler.java:1020)
at sun.rmi.server.LoaderHandler.access$300(LoaderHandler.java:52)
at sun.rmi.server.LoaderHandler$Loader.<init>(LoaderHandler.java:1108)
at sun.rmi.server.LoaderHandler$Loader.<init>(LoaderHandler.java:1089)
at sun.rmi.server.LoaderHandler$1.run(LoaderHandler.java:861)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.server.LoaderHandler.lookupLoader(LoaderHandler.java:858)
at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:541)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:628)
at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:294)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:238)
at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1494)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1457)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:375)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:240)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:595)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at startserver.StartServer.main(StartServer.java:22)
我的文件如下所示:server.policy
grant {
permission java.security.AllPermission;
};
但我也尝试过这个:
grant {
permission java.security.AllPermission;
permission java.io.FilePermission "file://C:/ProjX/server/serverProj/bin/usermanager", "read";
};
...和这个(和其他几个:-():
grant codeBase "file:///-" {
permission java.security.AllPermission;
};
但在每种情况下,结果都是一样的。是的,策略文件在路径中(当我将错误的语句写入策略文件时,我看到一个解析异常)。我尝试了其他几个“/”和“”星座,但它没有效果。
我使用Eclipse,我的VM参数是这样的:
-cp C:\ProjX\server\serverProj\bin\usermanager\
-Djava.rmi.server.codebase=file://C:/ProjX/server/serverProj/bin/usermanager/
-Djava.rmi.server.hostname=XYZ (anonymized)
-Djava.security.policy=server.policy
编译的 Remote-Interface 和 interface-implementation 类 (LoginImpl) 类位于以下路径中:“C:/ProjX/server/serverProj/bin/usermanager/”。主要方法,其中我将存根实例化并重新绑定到注册表,位于另一个包中,如下所示:
public static void main(String[] args) {
if (System.getSecurityManager() == null) {
System.setSecurityManager(new SecurityManager());
}
try {
String name = "Login";
Login login = new LoginImpl();
Login stub = (Login) UnicastRemoteObject.exportObject(login, 0);
Registry registry = LocateRegistry.getRegistry();
registry.rebind(name, stub);
System.out.println("LoginImpl bound");
} catch (Exception e) {
System.err.println("LoginImpl exception:");
e.printStackTrace();
}
}
有人对我有建议吗?
所以问题是一样的(表明更改代码库不是我的AccessControlException的解决方案)。不:我不想买插件“G B”。java.rmi.UnmarshalException