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import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5 {
private static MessageDigest digester;
static {
try {
digester = MessageDigest.getInstance("MD5");
}
catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
public static String crypt(String str) {
if (str == null || str.length() == 0) {
throw new IllegalArgumentException("String to encript cannot be null or zero length");
}
digester.update(str.getBytes());
byte[] hash = digester.digest();
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < hash.length; i++) {
if ((0xff & hash[i]) < 0x10) {
hexString.append("0" + Integer.toHexString((0xFF & hash[i])));
}
else {
hexString.append(Integer.toHexString(0xFF & hash[i]));
}
}
return hexString.toString();
}
}
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