Java 从已签名的小程序中列出本地目录
以下小程序被编译并打包到jar中,然后用自签名证书对jar进行签名Java 从已签名的小程序中列出本地目录,java,permissions,applet,Java,Permissions,Applet,以下小程序被编译并打包到jar中,然后用自签名证书对jar进行签名 import java.applet.Applet; import java.io.File; import java.security.AccessController; import java.security.PrivilegedAction; import java.security.PrivilegedActionException; public class Test extends Applet {
import java.applet.Applet;
import java.io.File;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
public class Test extends Applet {
private static final long serialVersionUID = -3127185193501384816L;
private final class DirectoryLister implements PrivilegedAction<File[]> {
private final String attachmentsFolder;
private DirectoryLister(String attachmentsFolder) {
this.attachmentsFolder = attachmentsFolder;
}
public File[] run() {
return new File(attachmentsFolder).listFiles();
}
}
public File[] getFiles() throws PrivilegedActionException {
String attachmentsFolder = getParameter("attachmentsFolder");
if (attachmentsFolder != null) {
return AccessController.doPrivileged(new DirectoryLister(
attachmentsFolder));
}
return null;
}
}
这是我的生日礼物。遇到以下错误:
java.security.PrivilegedActionException: java.lang.reflect.InvocationTargetException
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation.CallMethod(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSInvoke.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
at sun.plugin.liveconnect.PrivilegedCallMethodAction.run(Unknown Source)
... 4 more
Caused by: java.security.AccessControlException: access denied (java.io.FilePermission c:\test read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.list(Unknown Source)
at java.io.File.listFiles(Unknown Source)
at Test$DirectoryLister.run(Test.java:20)
at Test$DirectoryLister.run(Test.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at Test.getFiles(Test.java:28)
... 14 more
这让我不禁要问,我是否仍然需要显式地授予Java主目录中某个配置文件中的perms以读取c:/test?如果是这样的话,谁能给我指点一下如何做到这一点的指南吗?显然是缓存问题。清除所有缓存并重新构建/重新部署解决了该问题。也就是说,不需要额外的烫发设置
var files = applet.getFiles();
for (var file in files) {
// Do something to file.
}
java.security.PrivilegedActionException: java.lang.reflect.InvocationTargetException
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation.CallMethod(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSInvoke.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
at sun.plugin.liveconnect.PrivilegedCallMethodAction.run(Unknown Source)
... 4 more
Caused by: java.security.AccessControlException: access denied (java.io.FilePermission c:\test read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.list(Unknown Source)
at java.io.File.listFiles(Unknown Source)
at Test$DirectoryLister.run(Test.java:20)
at Test$DirectoryLister.run(Test.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at Test.getFiles(Test.java:28)
... 14 more