.net中压缩和解压缩的处理

//======================================================================== ???// ?类名: CommonCompress ???/// <summary> ???/// 用于对文件和字符串进行压缩 ???/// </summary> ???/// <remarks> ???/// 用于对文件和字符串进行压缩 ???/// </remarks> ???/*======================================================================= ???变更记录 ???序号　　　更新日期　　开发者　　　变更内容 ???0001　　　2008/07/22 ?张 ?????????新建 ???=======================================================================*/ ???public class CommonCompress ???{ ???????/// <summary> ???????/// 压缩字符串 ???????/// </summary> ???????/// <param name="strUncompressed">未压缩的字符串</param> ???????/// <returns>压缩的字符串</returns> ???????public static string StringCompress(string strUncompressed) ???????{ ???????????byte[] bytData = System.Text.Encoding.Unicode.GetBytes(strUncompressed); ???????????MemoryStream ms = new MemoryStream(); ???????????Stream s = new GZipStream(ms, CompressionMode.Compress); ???????????s.Write(bytData, 0, bytData.Length); ???????????s.Close(); ???????????byte[] dataCompressed = (byte[])ms.ToArray(); ???????????return System.Convert.ToBase64String(dataCompressed, 0, dataCompressed.Length); ???????} ???????/// <summary> ???????/// 解压缩字符串 ???????/// </summary> ???????/// <param name="strCompressed">压缩的字符串</param> ???????/// <returns>未压缩的字符串</returns> ???????public static string StringDeCompress(string strCompressed) ???????{ ???????????System.Text.StringBuilder strUncompressed = new System.Text.StringBuilder(); ???????????int totalLength = 0; ???????????byte[] bInput = System.Convert.FromBase64String(strCompressed); ; ???????????byte[] dataWrite = new byte[4096]; ???????????Stream s = new GZipStream(new MemoryStream(bInput), CompressionMode.Decompress); ???????????while (true) ???????????{ ???????????????int size = s.Read(dataWrite, 0, dataWrite.Length); ???????????????if (size > 0) ???????????????{ ???????????????????totalLength += size; ???????????????????strUncompressed.Append(System.Text.Encoding.Unicode.GetString(dataWrite, 0, size)); ???????????????} ???????????????else ???????????????{ ???????????????????break; ???????????????} ???????????} ???????????s.Close(); ???????????return strUncompressed.ToString(); ???????} ???????/// <summary> ???????/// 压缩文件 ???????/// </summary> ???????/// <param name="iFile">压缩前文件路径</param> ???????/// <param name="oFile">压缩后文件路径</param> ???????public static void CompressFile(string iFile, string oFile) ???????{ ???????????//判断文件是否存在 ???????????if (File.Exists(iFile) == false) ???????????{ ???????????????throw new FileNotFoundException("文件未找到!"); ???????????} ???????????//创建文件流 ???????????byte[] buffer = null; ???????????FileStream iStream = null; ???????????FileStream oStream = null; ???????????GZipStream cStream = null; ???????????try ???????????{ ???????????????//把文件写进数组 ???????????????iStream = new FileStream(iFile, FileMode.Open, FileAccess.Read, FileShare.Read); ???????????????buffer = new byte[iStream.Length]; ???????????????int num = iStream.Read(buffer, 0, buffer.Length); ???????????????if (num != buffer.Length) ???????????????{ ???????????????????throw new ApplicationException("压缩文件异常!"); ???????????????} ???????????????//创建文件输出流并输出 ???????????????oStream = new FileStream(oFile, FileMode.OpenOrCreate, FileAccess.Write); ???????????????cStream = new GZipStream(oStream, CompressionMode.Compress, true); ???????????????cStream.Write(buffer, 0, buffer.Length); ???????????} ???????????finally ???????????{ ???????????????//关闭流对象 ???????????????if (iStream != null) iStream.Close(); ???????????????if (cStream != null) cStream.Close(); ???????????????if (oStream != null) oStream.Close(); ???????????} ???????} ???????/// <summary> ???????/// 解压缩文件 ???????/// </summary> ???????/// <param name="iFile">压缩前文件路径</param> ???????/// <param name="oFile">压缩后文件路径</param> ???????public static void DecompressFile(string iFile, string oFile) ???????{ ???????????//判断文件是否存在 ???????????if (File.Exists(iFile) == false) ???????????{ ???????????????throw new FileNotFoundException("文件未找到!"); ???????????} ???????????//创建文件流 ???????????FileStream iStream = null; ???????????FileStream oStream = null; ???????????GZipStream dStream = null; ???????????byte[] qBuffer = new byte[4]; ???????????try ???????????{ ???????????????//把压缩文件写入数组 ???????????????iStream = new FileStream(iFile, FileMode.Open); ???????????????dStream = new GZipStream(iStream, CompressionMode.Decompress, true); ???????????????int position = (int)iStream.Length - 4; ???????????????iStream.Position = position; ???????????????iStream.Read(qBuffer, 0, 4); ???????????????iStream.Position = 0; ???????????????int num = BitConverter.ToInt32(qBuffer, 0); ???????????????byte[] buffer = new byte[num + 100]; ???????????????int offset = 0, total = 0; ???????????????while (true) ???????????????{ ???????????????????int bytesRead = dStream.Read(buffer, offset, 100); ???????????????????if (bytesRead == 0) break; ???????????????????offset += bytesRead; ???????????????????total += bytesRead; ???????????????} ???????????????//创建输出流并输出 ???????????????oStream = new FileStream(oFile, FileMode.Create); ???????????????oStream.Write(buffer, 0, total); ???????????????oStream.Flush(); ???????????} ???????????finally ???????????{ ???????????????//关闭流对象 ???????????????if (iStream != null) iStream.Close(); ???????????????if (dStream != null) dStream.Close(); ???????????????if (oStream != null) oStream.Close(); ???????????} ???????} ???}

using System;using System.Collections.Generic; using System.IO;using ICSharpCode.SharpZipLib.Zip;using ICSharpCode.SharpZipLib.Checksums;namespace ZYBNET.FW.Utility.CommonMethod{ ???//======================================================================== ???// ?类名: ZipHelper ???/// <summary> ???/// 用于对文件和字符串进行压缩 ???/// </summary> ???/// <remarks> ???/// 用于对文件和字符串进行压缩 ???/// </remarks> ???/*======================================================================= ???变更记录 ???序号　　　更新日期　　开发者　　　变更内容 ???0001　　　2008/07/22 ?张 ?????????新建 ???=======================================================================*/ ???public class ZipHelper ???{ ???????#region 压缩文件夹,支持递归 ???????/// <summary> ???????///　压缩文件夹 ???????/// </summary> ???????/// <param name="dir">待压缩的文件夹</param> ???????/// <param name="targetFileName">压缩后文件路径（包括文件名）</param> ???????/// <param name="recursive">是否递归压缩</param> ???????/// <returns></returns> ???????public static bool Compress(string dir, string targetFileName, bool recursive) ???????{ ???????????//如果已经存在目标文件，询问用户是否覆盖 ???????????if (File.Exists(targetFileName)) ???????????{ ???????????????throw new Exception("同名文件已经存在！"); ???????????} ???????????string[] ars = new string[2]; ???????????if (recursive == false) ???????????{ ???????????????ars[0] = dir; ???????????????ars[1] = targetFileName; ???????????????return ZipFileDictory(ars); ???????????} ???????????FileStream zipFile; ???????????ZipOutputStream zipStream; ???????????//打开压缩文件流 ???????????zipFile = File.Create(targetFileName); ???????????zipStream = new ZipOutputStream(zipFile); ???????????if (dir != String.Empty) ???????????{ ???????????????CompressFolder(dir, zipStream, dir); ???????????} ???????????//关闭压缩文件流 ???????????zipStream.Finish(); ???????????zipStream.Close(); ???????????if (File.Exists(targetFileName)) ???????????????return true; ???????????else ???????????????return false; ???????} ???????/// <summary> ???????/// 压缩目录 ???????/// </summary> ???????/// <param name="args">数组(数组[0]: 要压缩的目录; 数组[1]: 压缩的文件名)</param> ???????public static bool ZipFileDictory(string[] args) ???????{ ???????????ZipOutputStream zStream = null; ???????????try ???????????{ ???????????????string[] filenames = Directory.GetFiles(args[0]); ???????????????Crc32 crc = new Crc32(); ???????????????zStream = new ZipOutputStream(File.Create(args[1])); ???????????????zStream.SetLevel(6); ???????????????//循环压缩文件夹中的文件 ???????????????foreach (string file in filenames) ???????????????{ ???????????????????//打开压缩文件 ???????????????????FileStream fs = File.OpenRead(file); ???????????????????byte[] buffer = new byte[fs.Length]; ???????????????????fs.Read(buffer, 0, buffer.Length); ???????????????????ZipEntry entry = new ZipEntry(file); ???????????????????entry.DateTime = DateTime.Now; ???????????????????entry.Size = fs.Length; ???????????????????fs.Close(); ???????????????????crc.Reset(); ???????????????????crc.Update(buffer); ???????????????????entry.Crc = crc.Value; ???????????????????zStream.PutNextEntry(entry); ???????????????????zStream.Write(buffer, 0, buffer.Length); ???????????????} ???????????} ???????????catch ???????????{ ???????????????throw; ???????????} ???????????finally ???????????{ ???????????????zStream.Finish(); ???????????????zStream.Close(); ???????????} ???????????return true; ???????} ???????/// <summary> ???????/// 压缩某个子文件夹 ???????/// </summary> ???????/// <param name="basePath">待压缩路径</param> ???????/// <param name="zips">压缩文件流</param> ???????/// <param name="zipfolername">待压缩根路径</param> ????????????private static void CompressFolder(string basePath, ZipOutputStream zips, string zipfolername) ???????{ ???????????if (File.Exists(basePath)) ???????????{ ???????????????AddFile(basePath, zips, zipfolername); ???????????????return; ???????????} ???????????string[] names = Directory.GetFiles(basePath); ???????????foreach (string fileName in names) ???????????{ ???????????????AddFile(fileName, zips, zipfolername); ???????????} ???????????names = Directory.GetDirectories(basePath); ???????????foreach (string folderName in names) ???????????{ ???????????????CompressFolder(folderName, zips, zipfolername); ???????????} ???????} ???????/// <summary> ???????///　压缩某个子文件 ???????/// </summary> ???????/// <param name="fileName">待压缩文件</param> ???????/// <param name="zips">压缩流</param> ???????/// <param name="zipfolername">待压缩根路径</param> ???????private static void AddFile(string fileName, ZipOutputStream zips, string zipfolername) ???????{ ???????????if (File.Exists(fileName)) ???????????{ ???????????????CreateZipFile(fileName, zips, zipfolername); ???????????} ???????} ???????/// <summary> ???????/// 压缩单独文件 ???????/// </summary> ???????/// <param name="FileToZip">待压缩文件</param> ???????/// <param name="zips">压缩流</param> ???????/// <param name="zipfolername">待压缩根路径</param> ???????private static void CreateZipFile(string FileToZip, ZipOutputStream zips, string zipfolername) ???????{ ???????????try ???????????{ ???????????????FileStream StreamToZip = new FileStream(FileToZip, FileMode.Open, FileAccess.Read); ???????????????string temp = FileToZip; ???????????????string temp1 = zipfolername; ???????????????if (temp1.Length > 0) ???????????????{ ???????????????????temp = temp.Replace(zipfolername + "\\", ""); ???????????????} ???????????????ZipEntry ZipEn = new ZipEntry(temp); ???????????????zips.PutNextEntry(ZipEn); ???????????????byte[] buffer = new byte[16384]; ???????????????System.Int32 size = StreamToZip.Read(buffer, 0, buffer.Length); ???????????????zips.Write(buffer, 0, size); ???????????????try ???????????????{ ???????????????????while (size < StreamToZip.Length) ???????????????????{ ???????????????????????int sizeRead = StreamToZip.Read(buffer, 0, buffer.Length); ???????????????????????zips.Write(buffer, 0, sizeRead); ???????????????????????size += sizeRead; ???????????????????} ???????????????} ???????????????catch (System.Exception ex) ???????????????{ ???????????????????throw ex; ???????????????} ???????????????StreamToZip.Close(); ???????????} ???????????catch ???????????{ ???????????????throw; ???????????} ???????} ???????#endregion ???????#region 解压缩 ???????/// <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 static void UnZipFile(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 Exception("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); ???????????try ???????????{ ???????????????using (ZipInputStream 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 (directoryName.Length > 0) ???????????????????????{ ???????????????????????????Directory.CreateDirectory(unZipDir + directoryName); ???????????????????????} ???????????????????????if (!directoryName.EndsWith("//")) ???????????????????????????directoryName += "//"; ???????????????????????if (fileName != String.Empty) ???????????????????????{ ???????????????????????????using (FileStream streamWriter = File.Create(unZipDir + 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; ???????????????????????????????????} ???????????????????????????????} ???????????????????????????} ???????????????????????} ???????????????????} ???????????????} ???????????} ???????????catch ????????????{ ???????????????throw; ???????????} ???????} ???????#endregion ???}}

/// <summary> ???????/// Add a folder along with its subfolders to a Package ???????/// </summary> ???????/// <param name="folderName">The folder to add</param> ???????/// <param name="compressedFileName">The package to create</param> ???????/// <param name="overrideExisting">Override exsisitng files</param> ???????/// <returns></returns> ???????static bool PackageFolder(string folderName, string compressedFileName, bool overrideExisting) ???????{ ???????????if (folderName.EndsWith(@"\")) ???????????????folderName = folderName.Remove(folderName.Length - 1); ???????????bool result = false; ???????????if (!Directory.Exists(folderName)) ???????????{ ???????????????return result; ???????????} ???????????if (!overrideExisting && File.Exists(compressedFileName)) ???????????{ ???????????????return result; ???????????} ???????????try ???????????{ ???????????????using (Package package = Package.Open(compressedFileName, FileMode.Create)) ???????????????{ ???????????????????var fileList = Directory.EnumerateFiles(folderName, "*", SearchOption.AllDirectories); ???????????????????foreach (string fileName in fileList) ???????????????????{ ??????????????????????????????????????????????//The path in the package is all of the subfolders after folderName ???????????????????????string pathInPackage; ???????????????????????pathInPackage = Path.GetDirectoryName(fileName).Replace(folderName, string.Empty) + "/" + Path.GetFileName(fileName); ???????????????????????Uri partUriDocument = PackUriHelper.CreatePartUri(new Uri(pathInPackage, UriKind.Relative)); ???????????????????????PackagePart packagePartDocument = package.CreatePart(partUriDocument,"", CompressionOption.Maximum); ???????????????????????using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read)) ???????????????????????{ ???????????????????????????fileStream.CopyTo(packagePartDocument.GetStream()); ???????????????????????} ???????????????????} ???????????????} ???????????????result = true; ???????????} ???????????catch (Exception e) ???????????{ ???????????????throw new Exception("Error zipping folder " + folderName, e); ???????????} ??????????????????????return result; ???????} /// <summary> ???????/// Compress a file into a ZIP archive as the container store ???????/// </summary> ???????/// <param name="fileName">The file to compress</param> ???????/// <param name="compressedFileName">The archive file</param> ???????/// <param name="overrideExisting">override existing file</param> ???????/// <returns></returns> ???????static bool PackageFile(string fileName, string compressedFileName, bool overrideExisting) ???????{ ???????????bool result = false; ???????????if (!File.Exists(fileName)) ???????????{ ???????????????return result; ???????????} ???????????if (!overrideExisting && File.Exists(compressedFileName)) ???????????{ ???????????????return result; ???????????} ???????????try ???????????{ ???????????????Uri partUriDocument = PackUriHelper.CreatePartUri(new Uri(Path.GetFileName(fileName), UriKind.Relative)); ??????????????????????????????using (Package package = Package.Open(compressedFileName, FileMode.OpenOrCreate)) ???????????????{ ???????????????????if (package.PartExists(partUriDocument)) ???????????????????{ ???????????????????????package.DeletePart(partUriDocument); ???????????????????} ????????????????????PackagePart packagePartDocument = package.CreatePart(partUriDocument, "", CompressionOption.Maximum); ???????????????????using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read)) ???????????????????{ ???????????????????????fileStream.CopyTo(packagePartDocument.GetStream()); ???????????????????} ???????????????} ???????????????result = true; ???????????} ???????????catch (Exception e) ???????????{ ???????????????throw new Exception("Error zipping file " + fileName, e); ???????????} ???????????????????????return result; ???????}} ??????3、zip文件解压Code/// <summary> ???????/// Extract a container Zip. NOTE: container must be created as Open Packaging Conventions (OPC) specification ???????/// </summary> ???????/// <param name="folderName">The folder to extract the package to</param> ???????/// <param name="compressedFileName">The package file</param> ???????/// <param name="overrideExisting">override existing files</param> ???????/// <returns></returns> ???????static bool UncompressFile(string folderName, string compressedFileName, bool overrideExisting) ???????{ ???????????bool result = false; ???????????try ???????????{ ???????????????if (!File.Exists(compressedFileName)) ???????????????{ ???????????????????return result; ???????????????} ???????????????DirectoryInfo directoryInfo = new DirectoryInfo(folderName); ???????????????if (!directoryInfo.Exists) ???????????????????directoryInfo.Create(); ???????????????using (Package package = Package.Open(compressedFileName, FileMode.Open, FileAccess.Read)) ???????????????{ ???????????????????foreach (PackagePart packagePart in package.GetParts()) ???????????????????{ ???????????????????????ExtractPart(packagePart, folderName, overrideExisting); ???????????????????} ???????????????} ???????????????result = true; ???????????} ???????????catch (Exception e) ???????????{ ???????????????throw new Exception("Error unzipping file " + compressedFileName, e); ???????????} ???????????????????????return result; ???????} ???????static void ExtractPart(PackagePart packagePart, string targetDirectory, bool overrideExisting) ???????{ ???????????string stringPart = targetDirectory + HttpUtility.UrlDecode(packagePart.Uri.ToString()).Replace(‘\\‘, ‘/‘); ???????????if (!Directory.Exists(Path.GetDirectoryName(stringPart))) ???????????????Directory.CreateDirectory(Path.GetDirectoryName(stringPart)); ???????????if (!overrideExisting && File.Exists(stringPart)) ???????????????return; ???????????using (FileStream fileStream = new FileStream(stringPart, FileMode.Create)) ???????????{ ???????????????packagePart.GetStream().CopyTo(fileStream); ???????????} ???????}