how do I encode a complete http url String correctly?

Question

I get a url string from a user and would like to transform it to a legal http url:

\"http://one.two/three?four five\" should turn into \"htt

Answer 1

With external library:

import org.apache.commons.httpclient.util.URIUtil;
String myUrl_1= "http://one.two/three?four five";
System.out.println(URIUtil.encodeQuery(myUrl_1));

And the output:

http://one.two/three?four%20five

Or

String webResourceURL = "http://stackoverflow.com/search?q= s";
System.out.println(URIUtil.encodeQuery(webResourceURL));

And the output:

http://stackoverflow.com/search?q=%3Cscript%3Ealert(1)%3C/script%3E%20s

And the Maven dependency

    commons-httpclient
    commons-httpclient
    3.1