C#使用ICSharpCode.SharpZipLib.dll进行文件的压缩与解压功能

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using ICSharpCode.SharpZipLib.Zip;using ICSharpCode.SharpZipLib.Checksums;using System.Security.Cryptography;namespace zip压缩与解压{ public class ZipHelper {  /// <summary>  /// 压缩单个文件  /// </summary>  /// <param name="fileToZip">需压缩的文件名</param>  /// <param name="zipFile">压缩后的文件名（文件名都是绝对路径）</param>  /// <param name="level">压缩等级（0-9）</param>  /// <param name="password">压缩密码（解压是需要的密码）</param>  public static void ZipFile(string fileToZip, string zipFile, int level = 5, string password = "123")  {   if (!File.Exists(fileToZip))    throw new FileNotFoundException("压缩文件" + fileToZip + "不存在");   using (FileStream fs = File.OpenRead(fileToZip))   {    fs.Position = 0;//设置流的起始位置    byte[] buffer = new byte[(int)fs.Length];    fs.Read(buffer, 0, buffer.Length);//读取的时候设置Position，写入的时候不需要设置    fs.Close();    using (FileStream zfstram = File.Create(zipFile))    {     using (ZipOutputStream zipstream = new ZipOutputStream(zfstram))     {      zipstream.Password = md5(password);//设置属性的时候在PutNextEntry函数之前      zipstream.SetLevel(level);      string fileName = fileToZip.Substring(fileToZip.LastIndexOf('//') + 1);      ZipEntry entry = new ZipEntry(fileName);      zipstream.PutNextEntry(entry);      zipstream.Write(buffer, 0, buffer.Length);     }    }   }  }  /// <summary>  /// 压缩多个文件目录  /// </summary>  /// <param name="dirname">需要压缩的目录</param>  /// <param name="zipFile">压缩后的文件名</param>  /// <param name="level">压缩等级</param>  /// <param name="password">密码</param>  public static void ZipDir(string dirname, string zipFile, int level = 5, string password = "123")  {   ZipOutputStream zos = new ZipOutputStream(File.Create(zipFile));   zos.Password = md5(password);   zos.SetLevel(level);   addZipEntry(dirname, zos, dirname);   zos.Finish();   zos.Close();  }  /// <summary>  /// 往压缩文件里面添加Entry  /// </summary>  /// <param name="PathStr">文件路径</param>  /// <param name="zos">ZipOutputStream</param>  /// <param name="BaseDirName">基础目录</param>  private static void addZipEntry(string PathStr, ZipOutputStream zos, string BaseDirName)  {   DirectoryInfo dir = new DirectoryInfo(PathStr);   foreach (FileSystemInfo item in dir.GetFileSystemInfos())   {    if ((item.Attributes & FileAttributes.Directory) == FileAttributes.Directory)//如果是文件夹继续递归    {     addZipEntry(item.FullName, zos, BaseDirName);    }    else    {     FileInfo f_item = (FileInfo)item;     using (FileStream fs = f_item.OpenRead())     {      byte[] buffer = new byte[(int)fs.Length];      fs.Position = 0;      fs.Read(buffer, 0, buffer.Length);      fs.Close();      ZipEntry z_entry = new ZipEntry(item.FullName.Replace(BaseDirName, ""));      zos.PutNextEntry(z_entry);      zos.Write(buffer, 0, buffer.Length);     }    }   }  }  /// <summary>  /// 解压多个文件目录  /// </summary>  /// <param name="zfile">压缩文件绝对路径</param>  /// <param name="dirname">解压文件目录</param>  /// <param name="password">密码</param>  public static void UnZip(string zfile, string dirname, string password)  {   if (!Directory.Exists(dirname)) Directory.CreateDirectory(dirname);   using (ZipInputStream zis = new ZipInputStream(File.OpenRead(zfile)))   {    zis.Password = md5(password);    ZipEntry entry;    while ((entry = zis.GetNextEntry()) != null)    {     var strArr = entry.Name.Split('//');//这边判断压缩文件里面是否存在目录，存在的话先创建目录后继续解压     if (strArr.Length > 2)        Directory.CreateDirectory(dirname + @"/" + strArr[1]);     using (FileStream dir_fs = File.Create(dirname + entry.Name))     {      int size = 1024 * 2;      byte[] buffer = new byte[size];      while (true)      {       size = zis.Read(buffer, 0, buffer.Length);       if (size > 0)        dir_fs.Write(buffer, 0, size);       else        break;      }     }    }   }  }  private static string md5(string pwd)  {   var res = "";   MD5 md = MD5.Create();   byte[] s = md.ComputeHash(Encoding.Default.GetBytes(pwd));   for (int i = 0; i < s.Length; i++)    res = res + s[i].ToString("X");   return res;  } }}

static void Main(string[] args)  {   var str = @"/学籍导入模板.xls";   //var arr=str.Split('//');   var filePath = @"D:/程序文件/VS2010学习/StudyProgram/zip压缩与解压/File/学籍导入模板.xls";   //ZipHelper.ZipFile(filePath, @"D:/程序文件/VS2010学习/StudyProgram/zip压缩与解压/File/test.zip", 6, "123");   var dirPath = @"D:/程序文件/VS2010学习/StudyProgram/zip压缩与解压";   //ZipHelper.ZipDir(dirPath + @"/File", dirPath + @"/File.zip", 6, "huage");   ZipHelper.UnZip(dirPath + @"/File.zip", dirPath + @"/test", "huage");   Console.ReadKey();  }