Java Utililty Methods MD5

List of utility methods to do MD5

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Description

The list of methods to do MD5 are organized into topic(s).

Method

StringgetMD5Prefix()
getMD5Prefix 
return md5prefix;
StringgetMd5Script(String dstFilePath)
get Md Script 
StringBuffer buffer = new StringBuffer();
buffer.append(String.format("$filePath=\"%s\"" + winReturnCode, dstFilePath));
buffer.append(
        "$md5=New-Object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider" + winReturnCode);
buffer.append(
        "$hash=[System.BitConverter]::ToString($md5.ComputeHash([System.IO.File]::ReadAllBytes($filePath)))"
                + winReturnCode);
buffer.append("$hash" + winReturnCode);
...
StringinputStreamMD5(InputStream entity)
Computes the MD5 of an InputStream. 
MessageDigest md5 = null;
try {
    md5 = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
    throw new RuntimeException("Could not load MD5", e);
entity.mark(MAX_MARK);
byte[] buffer = new byte[16 * 1024];
...
booleanisEtagAlsoAnMD5Hash(String etag)
Guess whether the given ETag value is also an MD5 hash of an underlying object in a storage service, as opposed to being some other kind of opaque hash. 
if (etag == null || etag.length() != 32) {
    return false;
String nonHexChars = etag.toLowerCase().replaceAll("[a-f0-9]", "");
if (nonHexChars.length() > 0) {
    return false;
return true;
...
booleanlooksLikeValidMd5(String possibleMd5)
Is the argument a legitimate-seeming MD5 value? 
return (possibleMd5 != null) && possibleMd5.length() == MD5_LENGTH
        && possibleMd5.chars().allMatch(c -> isHex((char) c));
Stringmd5(File f)
md 
try {
    byte[] b = Files.readAllBytes(f.toPath());
    byte[] hash = MessageDigest.getInstance("MD5").digest(b);
    return DatatypeConverter.printHexBinary(hash);
} catch (NoSuchAlgorithmException e) {
    throw new IOException(e.getMessage(), e);
Stringmd5(final String text)
calculates an MD5 hash. 
return hash(text, "MD5");
Stringmd5(final String... tokens)
md 
String joinTokens = Stream.of(tokens).collect(Collectors.joining(":"));
final MessageDigest md = MessageDigest.getInstance("MD5");
md.reset();
return DatatypeConverter.printHexBinary(md.digest(joinTokens.getBytes(CHARACTER_SET))).toLowerCase();
Stringmd5(String source)
md 
byte[] bytes;
try {
    bytes = MessageDigest.getInstance("MD5").digest(source.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {
    return null;
return DatatypeConverter.printHexBinary(bytes).toLowerCase();
Stringmd5(String toDigest)
md 
String toReturn = "";
try {
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update(toDigest.getBytes());
    byte[] digest = md.digest();
    toReturn = DatatypeConverter.printHexBinary(digest).toUpperCase();
    md = null;
    digest = null;
...