MD5Encrypt加密

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������