(5)Java-MD5

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Encrypter {

    private static String[] hexMap = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F" };

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            String raw = "1";
            byte[] bs = md5.digest(raw.getBytes());
            StringBuilder sBuilder = new StringBuilder();
            for (byte b : bs) {
                sBuilder.append(byteToHex(b));
            }
            System.out.println(sBuilder.toString().toLowerCase());
        } catch (NoSuchAlgorithmException e) {
            // TODO: handle exception
        }

    }

    private static String byteToHex(byte b) {
        // return String.format("%02x", b);
        int i = b >= 0 ? b : b + 256;
        return hexMap[i >> 4] + hexMap[i % 16];
    }

}