写的一个Applet小程序,在读入一个图片时,出现了java.security.AccessControlException异常,怎么处理。
Exception in thread "Thread-3" java.security.AccessControlException: access deni
ed ("java.io.FilePermission" "\D:\java\javaAppletExample\ch2\html\Sunset.gif" "r
ead")
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:366)
at java.security.AccessController.checkPermission(AccessController.java:
555)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at java.lang.SecurityManager.checkRead(SecurityManager.java:888)
at sun.awt.image.URLImageSource.<init>(URLImageSource.java:55)
at sun.applet.AppletImageRef.reconstitute(AppletImageRef.java:51)
at sun.misc.Ref.get(Ref.java:64)
at sun.applet.AppletViewer.getCachedImage(AppletViewer.java:395)
at sun.applet.AppletViewer.getImage(AppletViewer.java:390)
at java.applet.Applet.getImage(Applet.java:274)
at java.applet.Applet.getImage(Applet.java:296)
at Ripple.run(Ripple.java:47)
at java.lang.Thread.run(Thread.java:722)
源程序47行是:
image = getImage(getDocumentBase(),name);
Exception in thread "Thread-3" java.security.AccessControlException: access deni
ed ("java.io.FilePermission" "\D:\java\javaAppletExample\ch2\html\Sunset.gif" "r
ead")
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:366)
at java.security.AccessController.checkPermission(AccessController.java:
555)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at java.lang.SecurityManager.checkRead(SecurityManager.java:888)
at sun.awt.image.URLImageSource.<init>(URLImageSource.java:55)
at sun.applet.AppletImageRef.reconstitute(AppletImageRef.java:51)
at sun.misc.Ref.get(Ref.java:64)
at sun.applet.AppletViewer.getCachedImage(AppletViewer.java:395)
at sun.applet.AppletViewer.getImage(AppletViewer.java:390)
at java.applet.Applet.getImage(Applet.java:274)
at java.applet.Applet.getImage(Applet.java:296)
at Ripple.run(Ripple.java:47)
at java.lang.Thread.run(Thread.java:722)
源程序47行是:
image = getImage(getDocumentBase(),name);
permission java.util.PropertyPermission "user.dir ", "read ";
permission java.util.PropertyPermission "user.home ", "read ";
permission java.util.PropertyPermission "java.home ", "read ";
permission java.util.PropertyPermission "java.class.path ", "read ";
permission java.util.PropertyPermission "user.name ", "read ";
permission java.lang.RuntimePermission "accessClassInPackage.sun.misc ";
permission java.lang.RuntimePermission "accessClassInPackage.sun.audio ";
permission java.lang.RuntimePermission "modifyThread ";
permission java.lang.RuntimePermission "modifyThreadGroup ";
permission java.lang.RuntimePermission "loadLibrary.* ";
permission java.io.FilePermission " < <ALL FILES> > ", "read ";
permission java.io.FilePermission "${user.dir}${/}jmf.log ", "write ";
permission java.io.FilePermission "${user.home}${/}.JMStudioCfg ", "write ";
permission java.net.SocketPermission "* ", "connect,accept ";
permission java.io.FilePermission "C:\WINNT\TEMP\* ", "write ";
permission java.io.FilePermission "C:\WINNT\TEMP\* ", "delete ";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner ";
permission javax.sound.sampled.AudioPermission "record ";
permission java.net.SocketPermission "- ", "listen ";
permission java.net.SocketPermission "- ", "accept ";
permission java.net.SocketPermission "- ", "connect ";
permission java.net.SocketPermission "- ", "resolve ";
permission java.security.AllPermission;
permission java.util.PropertyPermission "user.dir ", "read ";
permission java.util.PropertyPermission "user.home ", "read ";
permission java.util.PropertyPermission "java.home ", "read ";
permission java.util.PropertyPermission "java.class.path ", "read ";
permission java.util.PropertyPermission "user.name ", "read ";
permission java.lang.RuntimePermission "accessClassInPackage.sun.misc ";
permission java.lang.RuntimePermission "accessClassInPackage.sun.audio ";
permission java.lang.RuntimePermission "modifyThread ";
permission java.lang.RuntimePermission "modifyThreadGroup ";
permission java.lang.RuntimePermission "loadLibrary.* ";
permission java.io.FilePermission " < <ALL FILES> > ", "read ";
permission java.io.FilePermission "${user.dir}${/}jmf.log ", "write ";
permission java.io.FilePermission "${user.home}${/}.JMStudioCfg ", "write ";
permission java.net.SocketPermission "* ", "connect,accept ";
permission java.io.FilePermission "C:\WINNT\TEMP\* ", "write ";
permission java.io.FilePermission "C:\WINNT\TEMP\* ", "delete ";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner ";
permission javax.sound.sampled.AudioPermission "record ";
permission java.net.SocketPermission "- ", "listen ";
permission java.net.SocketPermission "- ", "accept ";
permission java.net.SocketPermission "- ", "connect ";
permission java.net.SocketPermission "- ", "resolve ";
permission java.security.AllPermission;