Building an absolute URL from a relative URL in Java

java url relative-url
Marty Pitt picture Marty Pitt · Sep 7, 2009 · Viewed 25.5k times · Source

I'm having trouble building an absolute URL from a relative URL without resorting to String hackery...

Given 

http://localhost:8080/myWebApp/someServlet

Inside the method:

   public void handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}

What's the most "correct" way of building :

http://localhost:8080/myWebApp/someImage.jpg

(Note, must be absolute, not relative)

Currently, I'm doing it through building the string, but there MUST be a better way.

I've looked at various combinations of new URI / URL, and I end up with

http://localhost:8080/someImage.jpg

Help greatly appreciated

Answer

Hamza Yerlikaya picture Hamza Yerlikaya · Sep 7, 2009

Using java.net.URL

 URL baseUrl = new URL("http://www.google.com/someFolder/");
 URL url = new URL(baseUrl, "../test.html");

Related questions

Java URL encoding of query string parameters

Say I have a URL http://example.com/query?q= and I have a query entered by the user such as: random word £500 bank $ I want the result to be a properly encoded URL: http://example.com/query?q=random%20…

Read More
How to get parameters from the URL with JSP

In JSP how do I get parameters from the URL? For example I have a URL www.somesite.com/Transaction_List.jsp?accountID=5 I want to get the 5. Is there a request.getAttribute( "accountID" ) like there is for sessions or …

Read More
Simplest way to read json from a URL in java

This might be a dumb question but what is the simplest way to read and parse JSON from URL in Java? In Groovy, it's a matter of few lines of code. Java examples that I find are ridiculously long (and …

Read More