package ddd;
class GetProps {
public static void main(String[] args) {
/* Test reading properties w & w/out security manager */
String s;
try {
System.out.println("About to get os.name property value");
s = System.getProperty("os.name", "not specified");
System.out.println(" The name of your operating system is: " + s);
System.out.println("About to get java.version property value");
s = System.getProperty("java.version", "not specified");
System.out.println(" The version of the JVM you are running is: " + s);
System.out.println("About to get user.home property value");
s = System.getProperty("user.home", "not specified");
System.out.println(" Your user home directory is: " + s);
System.out.println("About to get java.home property value");
s = System.getProperty("java.home", "not specified");
System.out.println(" Your JRE installation directory is: " + s);
} catch (Exception e) {
System.err.println("Caught exception " + e.toString());
}
}
} 代码编译后所在位置C:\aaa\ddd java -Djava.security.manager ddd.GetProps
grant codeBase "file:/C:/aaa/ddd/*"
{
permission java.security.AllPermission;
}
在java.policy中加上了如上的语句
结果还是出现了
C:\aaa>java -Djava.security.manager ddd.GetProps
About to get os.name property value
The name of your operating system is: Windows XP
About to get java.version property value
The version of the JVM you are running is: 1.5.0_11
About to get user.home property value
Caught exception java.security.AccessControlException: access denied (java.util.
PropertyPermission user.home read) 但是如果以上grant codeBase "file:/C:/aaa/ddd/*"
{
permission java.security.AllPermission;
}
改成
grant
{
permission java.security.AllPermission;
}
就没有任何问题了,我想问一下是不是"file:/C:/aaa/ddd/*"这样写有什么错误 谢谢大家指教 忙了一天也没明白。 帖子由 weifengqian 编辑过
解决方案 »
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