本文檔基於ICSharpCode.SharpZipLib.dll的封裝，經常使用的解壓和壓縮方法都已經涵蓋在內，都是通過項目實戰積累下來的html
1.基本介紹
因爲項目中須要用到各類壓縮將文件進行壓縮下載，減小網絡的帶寬，因此壓縮是一個很是常見的功能，對於壓縮微軟本身也提供了一些類庫c#
- 微軟自帶壓縮類ZipArchive類，適合NET FrameWork4.5纔可使用
- 調用壓縮軟件命令執行壓縮動做，這個就須要電腦自己安裝壓縮軟件了
- 使用第三方的壓縮dll文件，通常使用最多的是（ICSharpCode.SharpZipLib.dll），下載dll ICSharpCode.SharpZipLib.zip
本文使用的正是ICSharpCode.SharpZipLib.dll相關的dll，ZipArchive相關的壓縮和解壓縮，後續會慢慢補上的。網絡
2.實際項目
- 壓縮單個文件，須要指定壓縮等級
- 壓縮單個文件夾，須要指定壓縮等級
- 壓縮多個文件或者多個文件夾
- 對壓縮包進行加密【用的較少，實際狀況也有】
- 直接解壓，無需密碼
- 須要密碼解壓
2.1 壓縮單個文件
寫了兩個方法，能夠指定壓縮等級，這樣你的壓縮包大小就不同了
2.2 壓縮單個文件夾
public void ZipDir(string dirToZip, string zipedFileName, int compressionLevel = 9)
2.3 壓縮多個文件或者文件夾
public bool ZipManyFilesOrDictorys(IEnumerable<string> folderOrFileList, string zipedFile, string password)
2.4 對壓縮包進行加密
public bool ZipManyFilesOrDictorys(IEnumerable<string> folderOrFileList, string zipedFile, string password)
2.5 直接解壓，無需密碼
public void UnZip(string zipFilePath, string unZipDir)
3.演示圖
3.ZipHelper下載
//------------------------------------------------------------------------------------- // 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壓縮幫助類 /// /// 修改紀錄 /// /// 2015-09-16 版本：1.0 YangHengLian 建立主鍵，注意命名空間的排序。 /// 2016-5-7 YangHengLian增長了能夠支持多個文件或者多個文件夾打包成一個zip文件 /// /// 版本：1.0 /// /// <author> /// <name>YangHengLian</name> /// <date>2015-09-16</date> /// </author> /// </summary> public class ZipHelper { /// <summary> /// 壓縮文件夾 /// </summary> /// <param name="dirToZip"></param> /// <param name="zipedFileName"></param> /// <param name="compressionLevel">壓縮率0（無壓縮）9（壓縮率最高）</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> /// 獲取全部文件 /// </summary> /// <returns></returns> public Hashtable GetAllFies(string dir) { Hashtable filesList = new Hashtable(); DirectoryInfo fileDire = new DirectoryInfo(dir); if (!fileDire.Exists) { throw new FileNotFoundException("目錄:" + fileDire.FullName + "沒有找到!"); } GetAllDirFiles(fileDire, filesList); GetAllDirsFiles(fileDire.GetDirectories(), filesList); return filesList; } /// <summary> /// 獲取一個文件夾下的全部文件夾裏的文件 /// </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> /// 獲取一個文件夾下的文件 /// </summary> /// <param name="dir">目錄名稱</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：解壓zip格式的文件。 /// </summary> /// <param name="zipFilePath">壓縮文件路徑</param> /// <param name="unZipDir">解壓文件存放路徑,爲空時默認與壓縮文件同一級目錄下，跟壓縮文件同名的文件夾</param> /// <returns>解壓是否成功</returns> public void UnZip(string zipFilePath, string unZipDir) { if (zipFilePath == string.Empty) { throw new Exception("壓縮文件不能爲空！"); } if (!File.Exists(zipFilePath)) { throw new FileNotFoundException("壓縮文件不存在！"); } //解壓文件夾爲空時默認與壓縮文件同一級目錄下，跟壓縮文件同名的文件夾 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> /// 壓縮單個文件 /// </summary> /// <param name="filePath">被壓縮的文件名稱(包含文件路徑)，文件的全路徑</param> /// <param name="zipedFileName">壓縮後的文件名稱(包含文件路徑)，保存的文件名稱</param> /// <param name="compressionLevel">壓縮率0（無壓縮）到 9（壓縮率最高）</param> public void ZipFile(string filePath, string zipedFileName, int compressionLevel = 9) { // 若是文件沒有找到，則報錯 if (!File.Exists(filePath)) { throw new FileNotFoundException("文件：" + filePath + "沒有找到！"); } // 若是壓縮後名字爲空就默認使用源文件名稱做爲壓縮文件名稱 if (string.IsNullOrEmpty(zipedFileName)) { string oldValue = Path.GetFileName(filePath); if (oldValue != null) { zipedFileName = filePath.Replace(oldValue, "") + Path.GetFileNameWithoutExtension(filePath) + ".zip"; } } // 若是壓縮後的文件名稱後綴名不是zip，就是加上zip，防止是一個亂碼文件 if (Path.GetExtension(zipedFileName) != ".zip") { zipedFileName = zipedFileName + ".zip"; } // 若是指定位置目錄不存在，建立該目錄 C:\Users\yhl\Desktop\大漢三通 string zipedDir = zipedFileName.Substring(0, zipedFileName.LastIndexOf("\\", StringComparison.Ordinal)); if (!Directory.Exists(zipedDir)) { Directory.CreateDirectory(zipedDir); } // 被壓縮文件名稱 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> /// 壓縮單個文件 /// </summary> /// <param name="fileToZip">要進行壓縮的文件名，全路徑</param> /// <param name="zipedFile">壓縮後生成的壓縮文件名,全路徑</param> public void ZipFile(string fileToZip, string zipedFile) { // 若是文件沒有找到，則報錯 if (!File.Exists(fileToZip)) { throw new FileNotFoundException("指定要壓縮的文件: " + 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> /// 壓縮多個目錄或文件 /// </summary> /// <param name="folderOrFileList">待壓縮的文件夾或者文件，全路徑格式,是一個集合</param> /// <param name="zipedFile">壓縮後的文件名，全路徑格式</param> /// <param name="password">壓宿密碼</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) { //是文件夾 if (Directory.Exists(fileOrDir)) { res = ZipFileDictory(fileOrDir, s, ""); } else { //文件 res = ZipFileWithStream(fileOrDir, s); } } s.Finish(); s.Close(); return res; } } /// <summary> /// 帶壓縮流壓縮單個文件 /// </summary> /// <param name="fileToZip">要進行壓縮的文件名</param> /// <param name="zipStream"></param> /// <returns></returns> private bool ZipFileWithStream(string fileToZip, ZipOutputStream zipStream) { //若是文件沒有找到，則報錯 if (!File.Exists(fileToZip)) { throw new FileNotFoundException("指定要壓縮的文件: " + 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> /// 遞歸壓縮文件夾方法 /// </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 { //建立當前文件夾 entry = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/")); //加上 「/」 纔會當成是文件夾建立 s.PutNextEntry(entry); s.Flush(); //先壓縮文件，再遞歸壓縮文件夾 var filenames = Directory.GetFiles(folderToZip); foreach (string file in filenames) { //打開壓縮文件 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; } } }