【加密】Md5Util

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

public class Md5Util {

    public static final String GetMd5(String s) {
        char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
                'A', 'B', 'C', 'D', 'E', 'F' };
        char str[] = null;
        byte strTemp[] = s.getBytes();
        MessageDigest mdTemp;
        try {
            mdTemp = MessageDigest.getInstance("MD5");
            mdTemp.update(strTemp);
            byte md[] = mdTemp.digest();
            int j = md.length;
            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];
            }

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();
        }

        return new String(str);
    }

    public static void main(String args[]) {
        System.out.println(GetMd5("1"));
    }

}