java.security.AccessControlException: access denied 的解决方法

 java.security.AccessControlException: access denied 

解决方案有两个：

1，通过签名来解决：

2，通过更改java/lib/security/java.‍policy（注意jdk和jre的都改，保险）文件来实现。当然这种方式肯定不安全。具体做法是：将下面内容添加到java.policy文件中： 

permission java.lang.RuntimePermission "accessClassInPackage.sun.jdbc.odbc"; 
permission java.util.PropertyPermission "file.encoding", "read"; 
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;

 

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