How do I decompose a URL into its component parts in Java?

I am always forgetting the URI format, so here it is:

<scheme>://<userinfo>@<host>:<port><path>#<fragement> 

And here an example:

URI uri = new URI ("query://[email protected]:9000/public/manuals/appliances?stove#ge"); 

The following will happen:

• uri.getAuthority() will return "[email protected]:9000"
• uri.getFragment () will return "ge"
• uri.getHost () will return "books.com"
• uri.getPath () will return "/public/manuals/appliances"
• uri.getPort () will return 9000
• uri.getQuery () will return "stove"
• uri.getScheme () will return "query"
• uri.getSchemeSpecificPart () will return "//[email protected]:9000/public/manuals/appliances?stove"
• uri.getUserInfo () will return "jeff"
• uri.isAbsolute () will return true
• uri.isOpaque () will return false

I found this blog handy: Exploring Java's Network API: URIs and URLs

java.net.URI and java.net.URL do not work for many modern URLs. java.net.URI adheres to RFC 2396, which a really old standard. java.net.URL sometimes does a good job, but if you're working with URLs as found in the wild, it will fail for many cases.

In order to solve these issues, I wrote galimatias, a URL parsing and normalization library for Java. It will work with almost any URL you can imagine (basically, if it works in a web browser, galimatias will parse it correctly). And it has very convenient API.

You can get it at: https://github.com/smola/galimatias

Look at the getter methods of the URL class.

You have all you need there.

URL.getProtocol() URL.getHost() URL.getPort() 

And so on.