可以File
public File(URI uri)
Creates a new File instance by converting the given file: URI into an abstract pathname.
The exact form of a file: URI is system-dependent, hence the transformation performed by this constructor is also system-dependent. For a given abstract pathname f it is guaranteed that new File( f.toURI()).equals( f.getAbsoluteFile())
so long as the original abstract pathname, the URI, and the new abstract pathname are all created in (possibly different invocations of) the same Java virtual machine. This relationship typically does not hold, however, when a file: URI that is created in a virtual machine on one operating system is converted into an abstract pathname in a virtual machine on a different operating system. Parameters:
uri - An absolute, hierarchical URI with a scheme equal to "file", a non-empty path component, and undefined authority, query, and fragment components
Throws:
NullPointerException - If uri is null
IllegalArgumentException - If the preconditions on the parameter do not hold
Since:
1.4
See Also:
toURI(), URI
public File(URI uri)
Creates a new File instance by converting the given file: URI into an abstract pathname.
The exact form of a file: URI is system-dependent, hence the transformation performed by this constructor is also system-dependent. For a given abstract pathname f it is guaranteed that new File( f.toURI()).equals( f.getAbsoluteFile())
so long as the original abstract pathname, the URI, and the new abstract pathname are all created in (possibly different invocations of) the same Java virtual machine. This relationship typically does not hold, however, when a file: URI that is created in a virtual machine on one operating system is converted into an abstract pathname in a virtual machine on a different operating system. Parameters:
uri - An absolute, hierarchical URI with a scheme equal to "file", a non-empty path component, and undefined authority, query, and fragment components
Throws:
NullPointerException - If uri is null
IllegalArgumentException - If the preconditions on the parameter do not hold
Since:
1.4
See Also:
toURI(), URI
InputStream in = new URL("ftp://username:password@server/path/filename.ext").openStream();new URL("jar:http://www.abc.com/jars/rt.jar!/java/lang/Object.class").openStream();
我搞这个都一个星期多了,都快要没信心了。真是郁闷啊