String MD5(String str) {
try {
java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
byte[] array = md.digest(str.getBytes("UTF-8"));
return new String(encodeHex(array, DIGITS_LOWER));
} catch (java.security.NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
/**
* Computing the hash for a method is useful so as to create an alternate key from the method name
* + signature.
*
* @param qualifiedMethodName
* @param methodSignature
* @return
*/
public static String computeHash(String qualifiedMethodName, String methodSignature) {
String fullMethodName = qualifiedMethodName + methodSignature;
byte[] bytes = fullMethodName.getBytes();
md5.reset();
md5.update(bytes);
byte[] messageBytes = md5.digest();
StringBuffer message = new StringBuffer();
for (byte aByte : messageBytes) {
String expanded = Integer.toHexString(0xFF & aByte);
if (expanded.length() == 1) {
// normalize length of all strings
message.append("0");
}
message.append(expanded);
}
return message.toString();
}