C#中ZipHelper 压缩和解压帮助类

public void UnZip(string zipFilePath, string unZipDir)

//-------------------------------------------------------------------------------------// All Rights Reserved , Copyright (C) 2016 , ZTO , Ltd .//-------------------------------------------------------------------------------------using System;using System.Collections;using System.Collections.Generic;using System.IO;namespace ZTO.PicTest.Utilities{  using ICSharpCode.SharpZipLib.Checksums;  using ICSharpCode.SharpZipLib.Zip;  /// <summary>  /// Zip压缩帮助类  ///  /// 修改纪录  ///  ///    2015-09-16 版本：1.0 YangHengLian 创建主键，注意命名空间的排序。  ///   2016-5-7 YangHengLian增加了可以支持多个文件或者多个文件夹打包成一个zip文件  ///   /// 版本：1.0  ///  /// <author>  ///    <name>YangHengLian</name>  ///    <date>2015-09-16</date>  /// </author>  /// </summary>  public class ZipHelper  {    /// <summary>    /// 压缩文件夹    /// </summary>    /// <param name="dirToZip"></param>    /// <param name="zipedFileName"></param>    /// <param name="compressionLevel">压缩率0（无压缩）9（压缩率最高）</param>    public void ZipDir(string dirToZip, string zipedFileName, int compressionLevel = 9)    {      if (Path.GetExtension(zipedFileName) != ".zip")      {        zipedFileName = zipedFileName + ".zip";      }      using (var zipoutputstream = new ZipOutputStream(File.Create(zipedFileName)))      {        zipoutputstream.SetLevel(compressionLevel);        Crc32 crc = new Crc32();        Hashtable fileList = GetAllFies(dirToZip);        foreach (DictionaryEntry item in fileList)        {          FileStream fs = new FileStream(item.Key.ToString(), FileMode.Open, FileAccess.Read, FileShare.ReadWrite);          byte[] buffer = new byte[fs.Length];          fs.Read(buffer, 0, buffer.Length);          // ZipEntry entry = new ZipEntry(item.Key.ToString().Substring(dirToZip.Length + 1));          ZipEntry entry = new ZipEntry(Path.GetFileName(item.Key.ToString()))                   {                     DateTime = (DateTime) item.Value,                     Size = fs.Length                   };          fs.Close();          crc.Reset();          crc.Update(buffer);          entry.Crc = crc.Value;          zipoutputstream.PutNextEntry(entry);          zipoutputstream.Write(buffer, 0, buffer.Length);        }      }    }    /// <summary>     /// 获取所有文件     /// </summary>     /// <returns></returns>     public Hashtable GetAllFies(string dir)    {      Hashtable filesList = new Hashtable();      DirectoryInfo fileDire = new DirectoryInfo(dir);      if (!fileDire.Exists)      {        throw new FileNotFoundException("目录:" + fileDire.FullName + "没有找到!");      }      GetAllDirFiles(fileDire, filesList);      GetAllDirsFiles(fileDire.GetDirectories(), filesList);      return filesList;    }    /// <summary>     /// 获取一个文件夹下的所有文件夹里的文件     /// </summary>     /// <param name="dirs"></param>     /// <param name="filesList"></param>     public void GetAllDirsFiles(IEnumerable<DirectoryInfo> dirs, Hashtable filesList)    {      foreach (DirectoryInfo dir in dirs)      {        foreach (FileInfo file in dir.GetFiles("*.*"))        {          filesList.Add(file.FullName, file.LastWriteTime);        }        GetAllDirsFiles(dir.GetDirectories(), filesList);      }    }    /// <summary>     /// 获取一个文件夹下的文件     /// </summary>     /// <param name="dir">目录名称</param>    /// <param name="filesList">文件列表HastTable</param>     public static void GetAllDirFiles(DirectoryInfo dir, Hashtable filesList)    {      foreach (FileInfo file in dir.GetFiles("*.*"))      {        filesList.Add(file.FullName, file.LastWriteTime);      }    }    /// <summary>     /// 功能：解压zip格式的文件。     /// </summary>     /// <param name="zipFilePath">压缩文件路径</param>     /// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>     /// <returns>解压是否成功</returns>     public void UnZip(string zipFilePath, string unZipDir)    {      if (zipFilePath == string.Empty)      {        throw new Exception("压缩文件不能为空！");      }      if (!File.Exists(zipFilePath))      {        throw new FileNotFoundException("压缩文件不存在！");      }      //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹       if (unZipDir == string.Empty)        unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));      if (!unZipDir.EndsWith("/"))        unZipDir += "/";      if (!Directory.Exists(unZipDir))        Directory.CreateDirectory(unZipDir);      using (var s = new ZipInputStream(File.OpenRead(zipFilePath)))      {        ZipEntry theEntry;        while ((theEntry = s.GetNextEntry()) != null)        {          string directoryName = Path.GetDirectoryName(theEntry.Name);          string fileName = Path.GetFileName(theEntry.Name);          if (!string.IsNullOrEmpty(directoryName))          {            Directory.CreateDirectory(unZipDir + directoryName);          }          if (directoryName != null && !directoryName.EndsWith("/"))          {          }          if (fileName != String.Empty)          {            using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))            {              int size;              byte[] data = new byte[2048];              while (true)              {                size = s.Read(data, 0, data.Length);                if (size > 0)                {                  streamWriter.Write(data, 0, size);                }                else                {                  break;                }              }            }          }        }      }    }    /// <summary>    /// 压缩单个文件    /// </summary>    /// <param name="filePath">被压缩的文件名称(包含文件路径)，文件的全路径</param>    /// <param name="zipedFileName">压缩后的文件名称(包含文件路径)，保存的文件名称</param>    /// <param name="compressionLevel">压缩率0（无压缩）到 9（压缩率最高）</param>    public void ZipFile(string filePath, string zipedFileName, int compressionLevel = 9)    {      // 如果文件没有找到，则报错       if (!File.Exists(filePath))      {        throw new FileNotFoundException("文件：" + filePath + "没有找到！");      }      // 如果压缩后名字为空就默认使用源文件名称作为压缩文件名称      if (string.IsNullOrEmpty(zipedFileName))      {        string oldValue = Path.GetFileName(filePath);        if (oldValue != null)        {          zipedFileName = filePath.Replace(oldValue, "") + Path.GetFileNameWithoutExtension(filePath) + ".zip";        }      }      // 如果压缩后的文件名称后缀名不是zip，就是加上zip，防止是一个乱码文件      if (Path.GetExtension(zipedFileName) != ".zip")      {        zipedFileName = zipedFileName + ".zip";      }      // 如果指定位置目录不存在，创建该目录 C:/Users/yhl/Desktop/大汉三通      string zipedDir = zipedFileName.Substring(0, zipedFileName.LastIndexOf("//", StringComparison.Ordinal));      if (!Directory.Exists(zipedDir))      {        Directory.CreateDirectory(zipedDir);      }      // 被压缩文件名称      string filename = filePath.Substring(filePath.LastIndexOf("//", StringComparison.Ordinal) + 1);      var streamToZip = new FileStream(filePath, FileMode.Open, FileAccess.Read);      var zipFile = File.Create(zipedFileName);      var zipStream = new ZipOutputStream(zipFile);      var zipEntry = new ZipEntry(filename);      zipStream.PutNextEntry(zipEntry);      zipStream.SetLevel(compressionLevel);      var buffer = new byte[2048];      Int32 size = streamToZip.Read(buffer, 0, buffer.Length);      zipStream.Write(buffer, 0, size);      try      {        while (size < streamToZip.Length)        {          int sizeRead = streamToZip.Read(buffer, 0, buffer.Length);          zipStream.Write(buffer, 0, sizeRead);          size += sizeRead;        }      }      finally      {        zipStream.Finish();        zipStream.Close();        streamToZip.Close();      }    }    /// <summary>     /// 压缩单个文件     /// </summary>     /// <param name="fileToZip">要进行压缩的文件名，全路径</param>     /// <param name="zipedFile">压缩后生成的压缩文件名,全路径</param>     public void ZipFile(string fileToZip, string zipedFile)    {      // 如果文件没有找到，则报错       if (!File.Exists(fileToZip))      {        throw new FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");      }      using (FileStream fileStream = File.OpenRead(fileToZip))      {        byte[] buffer = new byte[fileStream.Length];        fileStream.Read(buffer, 0, buffer.Length);        fileStream.Close();        using (FileStream zipFile = File.Create(zipedFile))        {          using (ZipOutputStream zipOutputStream = new ZipOutputStream(zipFile))          {            // string fileName = fileToZip.Substring(fileToZip.LastIndexOf("//") + 1);            string fileName = Path.GetFileName(fileToZip);            var zipEntry = new ZipEntry(fileName)            {              DateTime = DateTime.Now,              IsUnicodeText = true            };            zipOutputStream.PutNextEntry(zipEntry);            zipOutputStream.SetLevel(5);            zipOutputStream.Write(buffer, 0, buffer.Length);            zipOutputStream.Finish();            zipOutputStream.Close();          }        }      }    }    /// <summary>    /// 压缩多个目录或文件    /// </summary>    /// <param name="folderOrFileList">待压缩的文件夹或者文件，全路径格式,是一个集合</param>    /// <param name="zipedFile">压缩后的文件名，全路径格式</param>    /// <param name="password">压宿密码</param>    /// <returns></returns>    public bool ZipManyFilesOrDictorys(IEnumerable<string> folderOrFileList, string zipedFile, string password)    {      bool res = true;      using (var s = new ZipOutputStream(File.Create(zipedFile)))      {        s.SetLevel(6);        if (!string.IsNullOrEmpty(password))        {          s.Password = password;        }        foreach (string fileOrDir in folderOrFileList)        {          //是文件夹          if (Directory.Exists(fileOrDir))          {            res = ZipFileDictory(fileOrDir, s, "");          }          else          {            //文件            res = ZipFileWithStream(fileOrDir, s);          }        }        s.Finish();        s.Close();        return res;      }    }    /// <summary>    /// 带压缩流压缩单个文件    /// </summary>    /// <param name="fileToZip">要进行压缩的文件名</param>    /// <param name="zipStream"></param>    /// <returns></returns>    private bool ZipFileWithStream(string fileToZip, ZipOutputStream zipStream)    {      //如果文件没有找到，则报错      if (!File.Exists(fileToZip))      {        throw new FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");      }      //FileStream fs = null;      FileStream zipFile = null;      ZipEntry zipEntry = null;      bool res = true;      try      {        zipFile = File.OpenRead(fileToZip);        byte[] buffer = new byte[zipFile.Length];        zipFile.Read(buffer, 0, buffer.Length);        zipFile.Close();        zipEntry = new ZipEntry(Path.GetFileName(fileToZip));        zipStream.PutNextEntry(zipEntry);        zipStream.Write(buffer, 0, buffer.Length);      }      catch      {        res = false;      }      finally      {        if (zipEntry != null)        {        }        if (zipFile != null)        {          zipFile.Close();        }        GC.Collect();        GC.Collect(1);      }      return res;    }    /// <summary>    /// 递归压缩文件夹方法    /// </summary>    /// <param name="folderToZip"></param>    /// <param name="s"></param>    /// <param name="parentFolderName"></param>    private bool ZipFileDictory(string folderToZip, ZipOutputStream s, string parentFolderName)    {      bool res = true;      ZipEntry entry = null;      FileStream fs = null;      Crc32 crc = new Crc32();      try      {        //创建当前文件夹        entry = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/")); //加上 “/” 才会当成是文件夹创建        s.PutNextEntry(entry);        s.Flush();        //先压缩文件，再递归压缩文件夹        var filenames = Directory.GetFiles(folderToZip);        foreach (string file in filenames)        {          //打开压缩文件          fs = File.OpenRead(file);          byte[] buffer = new byte[fs.Length];          fs.Read(buffer, 0, buffer.Length);          entry = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/" + Path.GetFileName(file)));          entry.DateTime = DateTime.Now;          entry.Size = fs.Length;          fs.Close();          crc.Reset();          crc.Update(buffer);          entry.Crc = crc.Value;          s.PutNextEntry(entry);          s.Write(buffer, 0, buffer.Length);        }      }      catch      {        res = false;      }      finally      {        if (fs != null)        {          fs.Close();        }        if (entry != null)        {        }        GC.Collect();        GC.Collect(1);      }      var folders = Directory.GetDirectories(folderToZip);      foreach (string folder in folders)      {        if (!ZipFileDictory(folder, s, Path.Combine(parentFolderName, Path.GetFileName(folderToZip))))        {          return false;        }      }      return res;    }  }}