Java Utililty Methods URI Encode

String encode(String str, boolean fullUri)
Code taken from rhino-1.7R1/src/org/mozilla/javascript/NativeGlobal.java and slightly adapted.

byte[] utf8buf = null;
StringBuilder sb = null;
for (int k = 0, length = str.length(); k != length; ++k) {
 char c = str.charAt(k);
 if (encodeUnescaped(c, fullUri)) {
 if (sb != null) {
 sb.append(c);
 } else {
 if (sb == null) {
 sb = new StringBuilder(length + 3);
 sb.append(str);
 sb.setLength(k);
 utf8buf = new byte[6];
 if (0xDC00 <= c && c <= 0xDFFF) {
 throw new URISyntaxException(str, c + " outside of valid range");
 int value;
 if (c < 0xD800 || 0xDBFF < c) {
 value = c;
 } else {
 k++;
 if (k == length) {
 throw new URISyntaxException(str, "out of chars");
 char c2 = str.charAt(k);
 if (!(0xDC00 <= c2 && c2 <= 0xDFFF)) {
 throw new URISyntaxException(str, "outside of valid range");
 value = ((c - 0xD800) << 10) + (c2 - 0xDC00) + 0x10000;
 int L = oneUcs4ToUtf8Char(utf8buf, value);
 assert utf8buf != null;
 for (int j = 0; j < L; j++) {
 int d = 0xff & utf8buf[j];
 sb.append('%');
 sb.append(toHexChar(d >>> 4));
 sb.append(toHexChar(d & 0xf));
return (sb == null) ? str : sb.toString();

String encode(String uri)
encode

StringBuilder out = new StringBuilder();
for (int i = 0; i < uri.length(); i++) {
 char c = uri.charAt(i);
 if (c >= 'a' && c <= 'z') {
 out.append(c);
 } else if (c >= '0' && c <= '9') {
 out.append(c);
 } else if (c >= 'A' && c <= 'Z') {
...

String encodeForURI(String uriPart)
encode For URI

String result = urlEncodeUtf8(uriPart);
result = result.replaceAll("\\+", "%20");
result = result.replaceAll("%2D", "-");
result = result.replaceAll("%5F", "_");
result = result.replaceAll("%2E", ".");
result = result.replaceAll("%7E", "~");
result = result.replaceAll("\\*", "%2A");
return result;
...

String encodeIfNeeded(String uri)
encode If Needed

String decodedUri = URLDecoder.decode(uri, "UTF-8");
if (uri.compareTo(decodedUri) == 0)
 return URLEncoder.encode(uri, "UTF-8");
else
 return uri;

String encodeUri(final String uri)
URI encodes a path to comply with Subversion specification (according to rfc2396).

try {
 return new URI(null, null, uri, null).toASCIIString();
} catch (URISyntaxException e) {
 throw new IllegalArgumentException(e);

URI encodeUri(final URI uri)
encode Uri

String uriString;
try {
 uriString = URLEncoder.encode(uri.toString(), DEFAULT_ENCODING);
} catch (final UnsupportedEncodingException e) {
 return null;
return URI.create(uriString);

String encodeURI(String s)
Encodes the passed String as UTF-8 using an algorithm that's compatible with JavaScript's encodeURIComponent function.

String result;
try {
 result = URLEncoder.encode(s, "UTF-8").replaceAll("\\+", "%20").replaceAll("\\%21", "!")
 .replaceAll("\\%27", "'").replaceAll("\\%28", "(").replaceAll("\\%29", ")")
 .replaceAll("\\%7E", "~");
catch (Exception e) {
 result = s;
...

String encodeUri(String string)
Encodes the given UTF-8 string so that it's safe for use within an URI.

if (string == null) {
 return null;
try {
 return URLEncoder.encode(string, "UTF-8").replace("+", "%20");
} catch (UnsupportedEncodingException ex) {
 throw new IllegalStateException(ex);

String encodeURI(String uri)
encode URI

String tmp = null;
tmp = uri.replaceAll(" ", "%20");
tmp = tmp.replaceAll("<", "%3C");
tmp = tmp.replaceAll(">", "%3E");
tmp = tmp.replaceAll("'", "%27");
tmp = tmp.replaceAll("\\x28", "%28"); 
tmp = tmp.replaceAll("\\x29", "%29"); 
tmp = tmp.replaceAll("\\x22", "%22"); 
...

String encodeUri(String uri)
URL-encodes everything between "/"-characters.

String newUri = "";
StringTokenizer st = new StringTokenizer(uri, "/ ", true);
while (st.hasMoreTokens()) {
 String tok = st.nextToken();
 if (tok.equals("/")) {
 newUri += "/";
 } else if (tok.equals(" ")) {
 newUri += "%20";
...