package utils;

import java.security.MessageDigest;

public class MD5Encrypt {

public MD5Encrypt() {

}

private final static String[] hexDigits = {

"0", "1", "2", "3", "4", "5", "6", "7",

"8", "9", "a", "b", "c", "d", "e", "f"};

/**

* ת���ֽ�����Ϊ16�����ִ�

* @param b �ֽ�����

* @return 16�����ִ�

*/

public static String byteArrayToString(byte[] b) {

StringBuffer resultSb = new StringBuffer();

for (int i = 0; i < b.length; i++) {

resultSb.append(byteToHexString(b[i]));//��ʹ�ñ�����ת����ɵõ����ܽ����16���Ʊ�ʾ����������ĸ��ϵ���ʽ

// resultSb.append(byteToNumString(b[i]));//ʹ�ñ������?ؼ��ܽ����10���������ִ�����ȫ������ʽ

}

return resultSb.toString();

}

private static String byteToNumString(byte b) {

int _b = b;

if (_b < 0) {

_b = 256 + _b;

}

return String.valueOf(_b);

}

private static String byteToHexString(byte b) {

int n = b;

if (n < 0) {

n = 256 + n;

}

int d1 = n / 16;

int d2 = n % 16;

return hexDigits[d1] + hexDigits[d2];

}

public static String MD5Encode(String origin) {

String resultString = null;

try {

resultString = new String(origin);

MessageDigest md = MessageDigest.getInstance("MD5");

resultString = byteArrayToString(md.digest(resultString.getBytes()));

}

catch (Exception ex) {

ex.printStackTrace();

}

return resultString;

}

/**

*

* @param args

*/

public static void main(String[] args) {

// MD5Encrypt md5encrypt = new MD5Encrypt();

System.out.println(MD5Encode("123456"));

}

}