Java Utililty Methods String Encode

List of utility methods to do String Encode

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Description

The list of methods to do String Encode are organized into topic(s).

Method

Stringencode(String text, String encoding)
encode 
if (true)
    return text;
try {
    byte[] bs = text.getBytes(System.getProperty("file.encoding"));
    ByteArrayInputStream is = new ByteArrayInputStream(bs);
    InputStreamReader r = new InputStreamReader(is, encoding);
    char[] cs = new char[bs.length];
    int l = r.read(cs, 0, cs.length);
...
Stringencode(String val, String encoding)
encode 
if (val == null) {
    return null;
return new String(val.getBytes(encoding));
Stringencode(String value, String encoding)
Encodes a String using the set of characters allowed in a URI. 
int len = value.length();
StringBuilder out = new StringBuilder(len * 3 / 2);
for (int charIndex = 0; charIndex < len; charIndex++) {
    char aChar = value.charAt(charIndex);
    if ((aChar <= 127) && sValidChar[aChar]) {
        out.append(aChar);
    } else if (aChar == ' ') {
        out.append('+');
...
StringencodeBase64(String str)
encode Base 
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream b64os = MimeUtility.encode(baos, "base64");
b64os.write(str.getBytes());
b64os.close();
return baos.toString().trim();
StringencodeConvenience(String str)
Performs safe URI-escaping of the '%' and ' ' characters in the string for convenience sake. 
Matcher m = CONVENIENCE_ENCODABLE.matcher(str);
boolean found = m.find();
if (found) {
    final char[] hexTable = HEX_TABLE;
    StringBuilder sb = new StringBuilder(str.length() + ENCODE_ALLOWANCE);
    int findStart = 0;
    do {
        final int pos = m.start();
...
voidencodeDataPair(final StringBuilder buffer, final String key, final String value)

Encode a key/value data pair to be used in a HTTP post request. 

buffer.append('&').append(encode(key)).append('=').append(encode(value));
StringencodeDoublePercent(String input)
encode Double Percent 
if (input.contains("%")) {
    input = input.replaceAll("%", "%25");
return encode(input);
StringencodeDownloadFileName(String s)
encode Download File Name 
try {
    return URLEncoder.encode(s, "UTF-8").replaceAll("\\+", "%20");
} catch (Exception e) {
return "";
StringencodeFilename(final String filename, final String userAgent)
Hack to get the correct format of the file name, based on USER-AGENT string. 
String codedFilename = null;
try {
    if (null != userAgent && -1 != userAgent.indexOf("MSIE")) {
        codedFilename = URLEncoder.encode(filename, DEFAULT_CHARSET);
    } else if (null != userAgent && -1 != userAgent.indexOf("Mozilla")) {
        codedFilename = MimeUtility.encodeText(filename, DEFAULT_CHARSET, "B");
} catch (UnsupportedEncodingException uee) {
...
StringencodeFilename(String filename, String encoding)
encode Filename 
String splChars = ".*[#$%?@].*";
if (filename.matches(splChars))
    return URLEncoder.encode(filename, encoding);
return filename;