How to get new URL when the input URL changes?

Question

Consider this URL http://dx.doi.org/10.1006/jpdc.1997.1383. When I put it in the browser address bar and press enter, the URL will change into http://www.sciencedirect.com/science/article/pii/S0743731597913836. Using Java, how can I get the second URL address?

do you want to detect the url redirection after URLConnection con = url.openConnection(); — Yogesh Patil
– Yogesh Patil, Commented Jan 20, 2016 at 6:50
Possible duplicate of Java - How to find the redirected url of a url? — thegauravmahawar
– thegauravmahawar, Commented Jan 20, 2016 at 6:53

Mohammad Faisal · Accepted Answer · 2016-01-20 06:55:47Z

2

Simply call getUrl() on URLConnection instance after calling getInputStream()

edited Jan 20, 2016 at 6:55

Mohammad Faisal

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answered Jan 20, 2016 at 6:51

Yogesh Patil

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John · Accepted Answer · 2016-01-20 06:51:34Z

1

URLConnection con = new URL( url ).openConnection();
System.out.println( "orignal url: " + con.getURL() );
con.connect();
System.out.println( "connected url: " + con.getURL() );
InputStream is = con.getInputStream();
System.out.println( "redirected url: " + con.getURL() );
is.close();

answered Jan 20, 2016 at 6:51

John

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2 Comments

user3049183 Over a year ago

what is the point of InputStream is = con.getInputStream();? you even did not use it. and you dont have to. Just write con.getInputStream();

John Over a year ago

You are kind a interacting with the source ( this way you are knowing the precise end point ). So if it is redicted, con.getURL() will be different.

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