分别用C#和Java实现MD5加密

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两种方法返回的结果是一样的

Java版：

import java.security.MessageDigest;/** * Created by liuyikai on 2016/8/8. */public class MD5Util {    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();            // 获得MD5摘要算法的 MessageDigest 对象            MessageDigest mdInst = MessageDigest.getInstance("MD5");            // 使用指定的字节更新摘要            mdInst.update(btInput);            // 获得密文            byte[] md = mdInst.digest();            // 把密文转换成十六进制的字符串形式            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;        }    }}

C#版：

using System;using System.Collections.Generic;using System.Linq;using System.Security.Cryptography;using System.Text;using System.Threading.Tasks;namespace PasswordGenerator{    class MD5Util    {        public static String MD5(string s)        {            char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };            MD5 md5 = new MD5CryptoServiceProvider();            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(s);            byte[] result = md5.ComputeHash(inputBytes);            int j = result.Length;            char[] str = new char[j * 2];            int k = 0;            for (int i = 0; i < j; i++)            {                byte byte0 = result[i];                str[k++] = hexDigits[byte0 >> 4 & 0xf];                str[k++] = hexDigits[byte0 & 0xf];            }            return new String(str);        }    }}

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