文件压缩和解压
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#region 单文件目录压缩和解压 protected void Button1_Click(object sender, EventArgs e) { ZipFile("D://MyTestFile", Server.MapPath("~/1.zip")); } protected void Button2_Click(object sender, EventArgs e) { unZipFile(Server.MapPath("~/1.zip"), Server.MapPath("~/")); } /// <summary> /// 适用于单文件夹的压缩 /// </summary> /// <param name="path">压缩文件路劲</param> /// <param name="destFileName">目标路径</param> public static void ZipFile(string path, string destFileName) { Crc32 crc = new Crc32(); ZipOutputStream s = new ZipOutputStream(File.Create(destFileName));// 创建压缩后文件 s.Password = ""; // 设置密码 s.SetLevel(6);//0-9 DirectoryInfo myDir = new DirectoryInfo(path);// 获取目录 if (myDir.Exists == true) { FileInfo[] myFileAry = myDir.GetFiles(); // 循环遍历文件夹下每一个文件 foreach (FileInfo objectFiles in myFileAry) { // 获取完整路径 FileStream fs = File.OpenRead(objectFiles.FullName); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); ZipEntry entry = new ZipEntry(objectFiles.FullName.Split('\\')[objectFiles.FullName.Split('\\').Length - 1]); 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); } s.Finish(); s.Close(); } } /// <summary> /// /// </summary> /// <param name="sourceFileName">被解压文件名称</param> /// <param name="destPath">解压后目录</param> /// <param name="fileType">密码</param> public static void unZipFile(string sourceFileName, string destPath) { ZipInputStream s = new ZipInputStream(File.OpenRead(sourceFileName)); ZipEntry entry; ArrayList arrayList = new ArrayList(); // 判断解压文件是否为空 while ((entry = s.GetNextEntry()) != null) { string fileName = Path.GetFileName(entry.Name); if (fileName != "") { fileName = destPath + "\\" + fileName; if (!Directory.Exists(destPath)) { Directory.CreateDirectory(destPath); } FileStream stream = File.Create(fileName); int size = 2048; byte[] data = new byte[2048]; s.Password = ""; while (true) { size = s.Read(data, 0, data.Length); if (size > 0) { stream.Write(data, 0, size); } else { break; } } stream.Close(); } } s.Close(); } #endregion #region 多文件压缩 protected void Button3_Click(object sender, EventArgs e) { string[] ss={Server.MapPath("~/B")}; Zip(Server.MapPath("~/m.zip"),Server.MapPath("~/"),4,"",ss); } /// <summary> /// 获取所有文件 /// </summary> /// <param name="parentDirectortPath">源文件路径</param> /// <param name="AllFilesPath">所有文件路径</param> public void GetDirectoryFiles(string parentDirectortPath, List<string> AllFilesPath) { string[] files = Directory.GetFiles(parentDirectortPath); // 添加所有文件路径 for (int i = 0; i < files.Length; i++) { AllFilesPath.Add(files[i]); } string[] directorys = Directory.GetDirectories(parentDirectortPath); // 递归遍历当然文件夹下的子文件夹 for (int i = 0; i < directorys.Length; i++) { GetDirectoryFiles(directorys[i],AllFilesPath); } if (files.Length == 0 &&directorys.Length == 0) { AllFilesPath.Add(parentDirectortPath); } } /// <summary> /// 生成压缩文件 /// </summary> /// <param name="zipPath">zip路径</param> /// <param name="sourceParentPath">源文件上级目录</param> /// <param name="level">压缩等级</param> /// <param name="password">密码</param> /// <param name="filesOrDirectoriesPaths">源文件路径</param> public void Zip(string zipPath, string sourceParentPath, int level, string password, string[] filesOrDirectoriesPaths) { List<string> allFilesPath = new List<string>(); // 获取所有文件 if (filesOrDirectoriesPaths.Length > 0) { for (int i = 0; i < filesOrDirectoriesPaths.Length; i++) { // 如果是文件直接添加 是目录 则遍历目录后添加 if (File.Exists(filesOrDirectoriesPaths[i])) { allFilesPath.Add(filesOrDirectoriesPaths[i]); } else if (Directory.Exists(filesOrDirectoriesPaths[i])) { GetDirectoryFiles(filesOrDirectoriesPaths[i],allFilesPath); } } } if (allFilesPath.Count > 0) { // ZipOutputStream s = new ZipOutputStream(File.Open(zipPath,FileMode.OpenOrCreate)); ZipOutputStream s = new ZipOutputStream(File.Create(zipPath)); s.SetLevel(level); s.Password = password; for (int i = 0; i < allFilesPath.Count; i++) { string strFile = allFilesPath[i].ToString(); if (strFile.Substring(strFile.Length - 1) == "") { string strFileName = strFile.Replace(sourceParentPath, ""); if (strFileName.StartsWith("")) { strFileName = strFileName.Substring(1); ZipEntry entery = new ZipEntry(strFileName); entery.DateTime = DateTime.Now; s.PutNextEntry(entery); } } else { FileStream fs = File.OpenRead(strFile); byte[] buffer=new byte[fs.Length]; fs.Read(buffer,0,buffer.Length); string strFileName = strFile.Replace(sourceParentPath,""); if (strFileName.StartsWith("")) { strFileName = strFileName.Substring(0); } ZipEntry entry = new ZipEntry(strFileName); entry.DateTime = DateTime.Now; s.PutNextEntry(entry); s.Write(buffer,0,buffer.Length); fs.Close(); fs.Dispose(); } } s.Finish(); s.Close(); } } #endregion
private void CompressFolder(string path,ZipOutputStream zipStream,int folderOffset) { // 获取文件夹中的文件 string[] files = Directory.GetFiles(path); // 循环遍历 foreach (string filename in files) { FileInfo fi=new FileInfo(filename); // 从文件夹名后开始截取 string entryName = filename.Substring(folderOffset); entryName = ZipEntry.CleanName(entryName); ZipEntry newEntry=new ZipEntry(entryName); newEntry.DateTime = fi.LastWriteTime; // newEntry.AESKeySize = 256; 使用AES则必须加上密码 128,256,0(off) // zipStream.UseZip64 = UseZip64.Off;// 使 zip能在各版本中解压 newEntry.Size = fi.Length; zipStream.PutNextEntry(newEntry); byte[] buffer=new byte[4096]; using (FileStream streamReader=File.OpenRead(filename)) { // 缓冲区从源文件复制到目标文件 StreamUtils.Copy(streamReader,zipStream,buffer); } zipStream.CloseEntry(); } // 递归遍历目录 string[] folders = Directory.GetDirectories(path); foreach (string folder in folders) { CompressFolder(folder,zipStream,folderOffset); } } /// <summary> /// 压缩文件 /// </summary> /// <param name="outPathname">压缩后文件名</param> /// <param name="password">密码</param> /// <param name="folderName">要压缩的文件夹</param> public void CreateSample(string outPathname,string password,string folderName) { FileStream fsout = File.Create(outPathname); ZipOutputStream zipStream=new ZipOutputStream(fsout); zipStream.SetLevel(3); zipStream.Password = password; int folderOffset = folderName.Length + (folderName.EndsWith("\\") ? 0 : 1); CompressFolder(folderName,zipStream,folderOffset); zipStream.IsStreamOwner = true; // 关闭相关流 zipStream.Close(); } protected void Button3_Click(object sender, EventArgs e) { CreateSample(Server.MapPath("~/test.zip"),"",Server.MapPath("~/GG")); } private void DownloadZipToBrowser(List<string> zipFileList) { Response.ContentType = "application/zip"; // If the browser is receiving a mangled zipfile, IIS Compression may cause this problem. Some members have found that // Response.ContentType = "application/octet-stream" has solved this. May be specific to Internet Explorer. Response.AppendHeader("content-disposition", "attachment; filename=\"Download.zip\""); Response.CacheControl = "Private"; Response.Cache.SetExpires(DateTime.Now.AddMinutes(3)); // or put a timestamp in the filename in the content-disposition byte[] buffer = new byte[4096]; ZipOutputStream zipOutputStream = new ZipOutputStream(Response.OutputStream); zipOutputStream.SetLevel(3); //0-9, 9 being the highest level of compression foreach (string fileName in zipFileList) { Stream fs = File.OpenRead(fileName);// or any suitable inputstream ZipEntry entry = new ZipEntry(ZipEntry.CleanName(fileName.Substring(fileName.LastIndexOf("\\")))); entry.Size = fs.Length; // Setting the Size provides WinXP built-in extractor compatibility, // but if not available, you can set zipOutputStream.UseZip64 = UseZip64.Off instead. zipOutputStream.PutNextEntry(entry); int count = fs.Read(buffer, 0, buffer.Length); while (count > 0) { zipOutputStream.Write(buffer, 0, count); count = fs.Read(buffer, 0, buffer.Length); if (!Response.IsClientConnected) { break; } Response.Flush(); } fs.Close(); } zipOutputStream.Close(); Response.Flush(); Response.End(); } protected void Button4_Click(object sender, EventArgs e) { List<string> list=new List<string>(); list.Add(Server.MapPath("~/test.zip")); DownloadZipToBrowser(list); }
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