如何使用Java编码URL

Question

Given an URL such as this one,

http://www.example.com/some directory/some file

how do you encode this URL? Browsers automatically encode it. In Java I couldn't find a ready made function. I suspect there should be such a function because this is generally needed.

When I try to use the URI class using the constructor with single String, and parse components of the URL, such as authority, path, etc, it gives error because it expects an encoded URL.

Do you know a ready made function that will produce, for example in this case:

http://www.example.com/some%20directory/some%20file

Answer 1

Try this:

final URL url = new URL("http://www.example.com/some directory/some file");
final URI uri = new URI(url.getProtocol(), url.getHost(), url.getPath(), null);

System.out.println(uri.toASCIIString());