C#與Java的MD5簡單驗證(執行個體代碼)_C#教程

C#端

using System;using System.IO;using System.Security.Cryptography;namespace 計算檔案的MD5值{  class MD5_Helper  {    /// <summary>    /// 檔案MD5校正    /// </summary>    /// <param name="pathName">檔案絕對路徑</param>    /// <returns>MD5校正碼</returns>    public string getMD5Hash(string pathName)    {      string strResult = "";      string strHashData = "";      byte[] arrbytHashValue;      FileStream oFileStream = null;      MD5CryptoServiceProvider oMD5Hasher =            new MD5CryptoServiceProvider();      try      {        oFileStream = new FileStream(pathName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);        arrbytHashValue = oMD5Hasher.ComputeHash(oFileStream);//計算指定Stream 對象的雜湊值        oFileStream.Close();        //由以連字號分隔的十六進位對構成的String，其中每一對錶示value 中對應的元素；例如“F-2C-4A”        strHashData = BitConverter.ToString(arrbytHashValue);        //替換-        strHashData = strHashData.Replace("-", "");        strResult = strHashData;      }      catch (System.Exception ex)      {      }      return strResult;    }    /// <summary>    /// 位元組數組校正    /// </summary>    /// <param name="buffer">待位元組數組</param>    /// <returns>MD5校正碼</returns>    public string getMD5Hash(byte[] buffer)    {      string strResult = "";      string strHashData = "";      byte[] arrbytHashValue;      MD5CryptoServiceProvider oMD5Hasher =            new MD5CryptoServiceProvider();      try      {        arrbytHashValue = oMD5Hasher.ComputeHash(buffer);//計算指定Stream 對象的雜湊值        //由以連字號分隔的十六進位對構成的String，其中每一對錶示value 中對應的元素；例如“F-2C-4A”        strHashData = BitConverter.ToString(arrbytHashValue);        //替換-        strHashData = strHashData.Replace("-", "");        strResult = strHashData;      }      catch(System.Exception ex)      {      }      return strResult;    }  }}

Java端

package com;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;public class MD5Util {/** * 預設的密碼字串組合，用來將位元組轉換成 16 進位表示的字元,apache校正下載的檔案的正確性用的就是預設的這個組合 */protected static char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6','7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };protected static MessageDigest messagedigest = null;static {try {messagedigest = MessageDigest.getInstance("MD5");} catch (NoSuchAlgorithmException e) {e.printStackTrace();}}public static void main(String[] args) throws IOException {byte[] buffer= "HelloWorld".getBytes();//位元組數組校正String md55 = getFileMD5String(buffer);System.out.println("md55:" + md55);}public static String getFileMD5String(File file) throws IOException {InputStream fis;fis = new FileInputStream(file);byte[] buffer = new byte[1024];int numRead = 0;while ((numRead = fis.read(buffer)) > 0) {messagedigest.update(buffer, 0, numRead);}fis.close();return bufferToHex(messagedigest.digest());}public static String getFileMD5String(byte[] buffer) throws IOException {messagedigest.update(buffer, 0, buffer.length);return bufferToHex(messagedigest.digest());}private static String bufferToHex(byte bytes[]) {return bufferToHex(bytes, 0, bytes.length);}private static String bufferToHex(byte bytes[], int m, int n) {StringBuffer stringbuffer = new StringBuffer(2 * n);int k = m + n;for (int l = m; l < k; l++) {appendHexPair(bytes[l], stringbuffer);}return stringbuffer.toString();}private static void appendHexPair(byte bt, StringBuffer stringbuffer) {char c0 = hexDigits[(bt & 0xf0) >> 4];// 取位元組中高 4 位的數字轉換// 為邏輯右移，將符號位一起右移,此處未發現兩種符號有何不同char c1 = hexDigits[bt & 0xf];// 取位元組中低 4 位的數字轉換stringbuffer.append(c0);stringbuffer.append(c1);}} 

以上就是小編為大家帶來的C#與Java的MD5簡單驗證(執行個體代碼)的全部內容了，希望對大家有所協助，多多支援雲棲社區~