我正在尝试在网页中嵌入 Java FX 音乐播放器。此 JavaFX 应用程序在 Web 启动模式下运行良好。但是当我尝试在 web 模式下运行它或尝试在构建后访问它的网页时，它给了我 AccessControlException。错误信息是这样的：
Match: beginTraversal
Match: digest selected JREDesc: JREDesc[version 1.6+, heap=-1--1, args=null, href=http://java.sun.com/products/autodl/j2se, sel=false, null, null], JREInfo: JREInfo for index 0:
platform is: 1.7
product is: 1.7.0_13
location is: http://java.sun.com/products/autodl/j2se
path is: C:\Program Files\Java\jre7\bin\javaw.exe
args is: null
native platform is: Windows, x86 [ x86, 32bit ]
JavaFX runtime is: JavaFX 2.2.5 found at C:\Program Files\Java\jre7\
enabled is: true
registered is: true
system is: true
Match: ignoring maxHeap: -1
Match: ignoring InitHeap: -1
Match: digesting vmargs: null
Match: digested vmargs: [JVMParameters: isSecure: true, args: ]
Match: JVM args after accumulation: [JVMParameters: isSecure: true, args: ]
Match: digest LaunchDesc: file:/C:/Users/lenovo/Documents/NetBeansProjects/MusicPlay/dist/MusicPlay.jnlp
Match: digest properties: []
Match: JVM args: [JVMParameters: isSecure: true, args: ]
Match: endTraversal ..
Match: JVM args final:
Match: Running JREInfo Version match: 1.7.0.13 == 1.7.0.13
Match: Running JVM args match: have:<> satisfy want:<>
java.security.AccessControlException: access denied ("java.util.PropertyPermission" "user.dir" "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.checkPropertyAccess(Unknown Source)
at java.lang.System.getProperty(Unknown Source)
at java.io.Win32FileSystem.getUserPath(Unknown Source)
at java.io.Win32FileSystem.resolve(Unknown Source)
at java.io.File.getAbsolutePath(Unknown Source)
at java.io.File.getAbsoluteFile(Unknown Source)
at java.io.File.toURI(Unknown Source)
at musicplay.MusicPlay.start(MusicPlay.java:90)
at com.sun.javafx.applet.FXApplet2$1.run(FXApplet2.java:131)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:176)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:176)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
at java.lang.Thread.run(Unknown Source)
CacheEntry[file:/C:/Users/lenovo/Documents/NetBeansProjects/MusicPlay/dist/MusicPlay.jnlp]: updateAvailable=true,lastModified=Mon Feb 04 18:25:32 IST 2013,length=948
CacheEntry[file:/C:/Users/lenovo/Documents/NetBeansProjects/MusicPlay/dist/MusicPlay.jnlp]: updateAvailable=true,lastModified=Mon Feb 04 18:25:32 IST 2013,length=948
CacheEntry[file:/C:/Users/lenovo/Documents/NetBeansProjects/MusicPlay/dist/MusicPlay.jar]: updateAvailable=false,lastModified=Mon Feb 04 18:46:10 IST 2013,length=31879
Java Plug-in 10.13.2.20
Using JRE version 1.7.0_13-b20 Java HotSpot(TM) Client VM
User home directory = C:\Users\lenovo
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------
我尝试通过授予以下权限来编辑 .java.policy 文件
grant codeBase "file:*" {
permission java.security.AllPermission;
};
但它仍然给了我同样的信息。任何帮助将不胜感激。