java.io.FilePermission - 拒绝访问
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java.io.FilePermission - access denied
提问by athresh
Exception in thread "AWT-EventQueue-1" java.security.AccessControlException: acc ess denied (java.io.FilePermission write)
线程“AWT-EventQueue-1”中的异常java.security.AccessControlException：访问被拒绝（java.io.FilePermission write）
i am getting the above error when i tried to write into a file.
当我尝试写入文件时出现上述错误。
what i need to do kindly help out...
我需要做什么请帮忙...
i am running an applet application...
我正在运行一个小程序应用程序...
回答by asgs
Applets are by default denied from accessing the client's file I/O. You need to sign your applet or edit the policy files.
默认情况下，Applet 被拒绝访问客户端的文件 I/O。您需要签署您的小程序或编辑策略文件。
回答by alpian
As far as i know Applets cannot write to files as this would be a security violation. You can expressly grant the file-writing permission to the JVM to enable this but i think that would be a really bad idea because your users would be allowing you to write whatever you wanted to their disk via the web. Why does your applet want to write to a file?
据我所知，Applet 无法写入文件，因为这会违反安全性。您可以明确授予 JVM 文件写入权限以启用此功能，但我认为这将是一个非常糟糕的主意，因为您的用户将允许您通过 Web 将任何您想要的内容写入他们的磁盘。为什么您的小程序要写入文件？
回答by Anthony Accioly
Is your applet signed? Non signed applets can't access files. See here: http://java.sun.com/developer/onlineTraining/Programming/JDCBook/signed.html
你的小程序签名了吗？未签名的小程序无法访问文件。请参阅此处：http: //java.sun.com/developer/onlineTraining/Programming/JDCBook/signed.html
回答by user7412746
Do like this:
这样做：
fos=AccessController.doPrivileged(new PrivilegedAction()
public FileOutputStream run() {
return new FileOutputStream(f1);
}
});
or edit file "java.policy" add
permission java.io.FilePermission "<<ALL FILES>>", "read,write";
或编辑文件“ java.policy”添加权限java.io.FilePermission "<<ALL FILES>>", "read,write"；
