Java and RFC 3986 URI encoding

Question

is there a class to encode a generic String following the RFC 3986 specification?

That is: "hello world" => "hello%20world" Not (RFC 1738): "hello+world"

Thanks

Answer 1

If it's a url, use URI

URI uri = new URI("http", "//hello world", null);
String urlString = uri.toASCIIString();
System.out.println(urlString);

Answer 2

Solved with this:

http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/web/util/UriUtils.html

Method encodeUri

Answer 3

Source : Twitter RFC3986 compliant encoding functions.

This method takes string and converts it to RFC3986 specific encoded string.

/** The encoding used to represent characters as bytes. */
public static final String ENCODING = "UTF-8";

public static String percentEncode(String s) {
    if (s == null) {
        return "";
    }
    try {
        return URLEncoder.encode(s, ENCODING)
                // OAuth encodes some characters differently:
                .replace("+", "%20").replace("*", "%2A")
                .replace("%7E", "~");
        // This could be done faster with more hand-crafted code.
    } catch (UnsupportedEncodingException wow) {
        throw new RuntimeException(wow.getMessage(), wow);
    }
}