Md5加密算法

package com.Md5;

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

public class Md5JdkUtil {
    /**
     * 将byte数组转化为16进制输出
     * @param bytes
     * @author Administrator
     * @return String
     */
    public static String convertByteToHexString(byte[] bytes) {
        String result = "";
        for(int i=0;i<bytes.length;i++) {
            int temp = bytes[i] & 0xff;
            String tempHex = Integer.toHexString(temp);
            if(tempHex.length() < 2) {
                result += "0" + tempHex;
            }else {
                result += tempHex;
            }
        }
        
        return result;
    }
    /**
     * jdk自带的Md5加密
     * @param message
     * @return  String
     */
    public static String Md5Jdk(String message) {
        String temp = "";
        try {
            MessageDigest md5Digest = MessageDigest.getInstance("MD5");
            byte[] encodeMd5Digest = md5Digest.digest(message.getBytes());
            //将encodeMd5Digest字节数组转化为16进制
            temp = convertByteToHexString(encodeMd5Digest);        
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return temp;
    }
    
    public static void main(String[] args) {
        //Md5加密算法
        String md5Encode = Md5Jdk("951755155");
        System.out.println("Md5JDK加密后为：" + md5Encode);
        System.out.println("Md5JDK加密后密文的长度为：" + md5Encode.length());
    }
}