URLEncoding

http://www.w3schools.com/html/html_urlencode.asp
http://www.w3schools.com/tags/ref_urlencode.asp

http://docs.oracle.com/javase/7/docs/api/java/net/URLEncoder.html

http://blog.lunatech.com/2009/02/03/what-every-web-developer-must-know-about-url-encoding