Java中的MD5算法

public final static String MD5(String password) throws NoSuchAlgorithmException
{
char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd','e', 'f'};
byte[] strTemp = password.getBytes();
MessageDigest mdTemp = MessageDigest.getInstance("MD5");
mdTemp.update(strTemp);

byte[] md = mdTemp.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;

for (int i = 0; i < j; i++)
{
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>>4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}

return new String(str);

}