Md5Utils 加密源码

package com.supermarket.util;

import java.security.MessageDigest;

public class Md5Utils {

public static void main(String[] args) {

// System.out.println(Md5Utils.md5("123456"));

}

public final static String md5(String s) {

char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',

'a', 'b', 'c', 'd', 'e', 'f' };

try {

byte[] btInput = s.getBytes();

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

mdInst.update(btInput);

byte[] md = mdInst.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);

} catch (Exception e) {

e.printStackTrace();

return null;

}

}

}