If you use redirect, this is onLine url encode site:
http://netzreport.googlepages.com/online_tool_for_url_en_decoding.html
http://meyerweb.com/eric/tools/dencoder/
public static String encodeURL(String backLink) {
String encode = null;
try {
encode = URLEncoder.encode(backLink, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStack();
}
return encode;
}