Java tutorial
//package com.java2s; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; public class Main { private final static String ENCODE = "UTF-8"; /** * unreserved characters (ALPHA / DIGIT / "-" / "." / "_" / "~") MUST not be encoded, * others MUST be encoded. * @param str * @return percent encoding defined in RFC 5849 3.6. Percent Encoding */ private static String oauthEncode(String str) { try { return URLEncoder.encode(str, ENCODE).replace("*", "%2A").replace("%7E", "~").replace("+", "%20"); } catch (UnsupportedEncodingException e) { return null; } } }