C#压缩打包文件

 /// <summary>  /// 压缩和解压文件  /// </summary>  public class ZipClass  {      /// <summary>      /// 所有文件缓存      /// </summary>      List<string> files = new List<string>();        /// <summary>      /// 所有空目录缓存      /// </summary>      List<string> paths = new List<string>();        /// <summary>      /// 压缩单个文件      /// </summary>      /// <param name="fileToZip">要压缩的文件</param>      /// <param name="zipedFile">压缩后的文件全名</param>      /// <param name="compressionLevel">压缩程度，范围0-9，数值越大，压缩程序越高</param>      /// <param name="blockSize">分块大小</param>      public void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize)      {          if (!System.IO.File.Exists(fileToZip))//如果文件没有找到，则报错          {              throw new FileNotFoundException("The specified file " + fileToZip + " could not be found. Zipping aborderd");          }            FileStream streamToZip = new FileStream(fileToZip, FileMode.Open, FileAccess.Read);          FileStream zipFile = File.Create(zipedFile);          ZipOutputStream zipStream = new ZipOutputStream(zipFile);          ZipEntry zipEntry = new ZipEntry(fileToZip);          zipStream.PutNextEntry(zipEntry);          zipStream.SetLevel(compressionLevel);          byte[] buffer = new byte[blockSize];          int 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;              }          }          catch (Exception ex)          {              GC.Collect();              throw ex;          }            zipStream.Finish();          zipStream.Close();          streamToZip.Close();          GC.Collect();      }        /// <summary>      /// 压缩目录（包括子目录及所有文件）      /// </summary>      /// <param name="rootPath">要压缩的根目录</param>      /// <param name="destinationPath">保存路径加压缩文件全名</param>      /// <param name="compressLevel">压缩程度，范围0-9，数值越大，压缩程序越高</param>      public void ZipFileFromDirectory(string rootPath, string destinationPath, int compressLevel)      {          GetAllDirectories(rootPath);            /* while (rootPath.LastIndexOf("\\") + 1 == rootPath.Length)//检查路径是否以"\"结尾         {          rootPath = rootPath.Substring(0, rootPath.Length - 1);//如果是则去掉末尾的"\"          }         */          //string rootMark = rootPath.Substring(0, rootPath.LastIndexOf("\\") + 1);//得到当前路径的位置，以备压缩时将所压缩内容转变成相对路径。          string rootMark = rootPath + "\\";//得到当前路径的位置，以备压缩时将所压缩内容转变成相对路径。          Crc32 crc = new Crc32();          //ZipOutputStream outPutStream = new ZipOutputStream(File.Create(destinationPath));  //这里会报没有权限的错        //更正为        FileStream fs = new FileStream(destinationPath, FileMode.Create, FileAccess.Write);     ZipOutputStream outPutStream = new ZipOutputStream(fs);        outPutStream.SetLevel(compressLevel); // 0 - store only to 9 - means best compression          foreach (string file in files)          {              FileStream fileStream = File.OpenRead(file);//打开压缩文件              byte[] buffer = new byte[fileStream.Length];              fileStream.Read(buffer, 0, buffer.Length);              ZipEntry entry = new ZipEntry(file.Replace(rootMark, string.Empty));              entry.DateTime = DateTime.Now;              // set Size and the crc, because the information              // about the size and crc should be stored in the header              // if it is not set it is automatically written in the footer.              // (in this case size == crc == -1 in the header)              // Some ZIP programs have problems with zip files that don't store              // the size and crc in the header.              entry.Size = fileStream.Length;              fileStream.Close();              crc.Reset();              crc.Update(buffer);              entry.Crc = crc.Value;              outPutStream.PutNextEntry(entry);              outPutStream.Write(buffer, 0, buffer.Length);          }            this.files.Clear();            foreach (string emptyPath in paths)          {              ZipEntry entry = new ZipEntry(emptyPath.Replace(rootMark, string.Empty) + "/");              outPutStream.PutNextEntry(entry);          }            this.paths.Clear();          outPutStream.Finish();          outPutStream.Close();          GC.Collect();      }        /// <summary>      /// 取得目录下所有文件及文件夹，分别存入files及paths      /// </summary>      /// <param name="rootPath">根目录</param>      private void GetAllDirectories(string rootPath)      {          string[] subPaths = Directory.GetDirectories(rootPath);//得到所有子目录          foreach (string path in subPaths)          {              GetAllDirectories(path);//对每一个字目录做与根目录相同的操作：即找到子目录并将当前目录的文件名存入List          }          string[] files = Directory.GetFiles(rootPath);          foreach (string file in files)          {              this.files.Add(file);//将当前目录中的所有文件全名存入文件List          }          if (subPaths.Length == files.Length && files.Length == 0)//如果是空目录          {              this.paths.Add(rootPath);//记录空目录          }      }        /// <summary>      /// 解压缩文件(压缩文件中含有子目录)      /// </summary>      /// <param name="zipfilepath">待解压缩的文件路径</param>      /// <param name="unzippath">解压缩到指定目录</param>      /// <returns>解压后的文件列表</returns>      public List<string> UnZip(string zipfilepath, string unzippath)      {          //解压出来的文件列表          List<string> unzipFiles = new List<string>();            //检查输出目录是否以“\\”结尾          if (unzippath.EndsWith("\\") == false || unzippath.EndsWith(":\\") == false)          {              unzippath += "\\";          }            ZipInputStream s = new ZipInputStream(File.OpenRead(zipfilepath));          ZipEntry theEntry;          while ((theEntry = s.GetNextEntry()) != null)          {              string directoryName = Path.GetDirectoryName(unzippath);              string fileName = Path.GetFileName(theEntry.Name);                //生成解压目录【用户解压到硬盘根目录时，不需要创建】              if (!string.IsNullOrEmpty(directoryName))              {                  Directory.CreateDirectory(directoryName);              }                if (fileName != String.Empty)              {                  //如果文件的压缩后大小为0那么说明这个文件是空的,因此不需要进行读出写入                  if (theEntry.CompressedSize == 0)                      break;                  //解压文件到指定的目录                  directoryName = Path.GetDirectoryName(unzippath + theEntry.Name);                  //建立下面的目录和子目录                  Directory.CreateDirectory(directoryName);                    //记录导出的文件                  unzipFiles.Add(unzippath + theEntry.Name);                    FileStream streamWriter = File.Create(unzippath + theEntry.Name);                    int size = 2048;                  byte[] data = new byte[2048];                  while (true)                  {                      size = s.Read(data, 0, data.Length);                      if (size > 0)                      {                          streamWriter.Write(data, 0, size);                      }                      else                      {                          break;                      }                  }                  streamWriter.Close();              }          }          s.Close();          GC.Collect();          return unzipFiles;      }  } 

转载至http://blog.csdn.net/nieweiking/article/details/8663837

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