關于本文檔的說明

　　本文檔基于ICSharpCode.SharpZipLib.dll的封裝，常用的解壓和壓縮方法都已經涵蓋在內，都是經過項目實戰積累下來的

1.基本介紹

由于項目中需要用到各種壓縮將文件進行壓縮下載，減少網絡的帶寬，所以壓縮是一個非常常見的功能，對于壓縮微軟自己也提供了一些類庫

微軟自帶壓縮類ZipArchive類，適合NET FrameWork4.5才可以使用

調用壓縮軟件命令執行壓縮動作，這個就需要電腦本身安裝壓縮軟件了

使用第三方的壓縮dll文件，一般使用最多的是（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，后續會慢慢補上的。

2.實際項目

壓縮單個文件，需要指定壓縮等級

壓縮單個文件夾，需要指定壓縮等級

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，實際情況也有】

直接解壓，無需密碼

需要密碼解壓

2.1 壓縮單個文件

寫了兩個方法，可以指定壓縮等級，這樣你的壓縮包大小就不一樣了

2.2 壓縮單個文件夾

public void ZipDir(string dirToZip, string zipedFileName, int compressionLevel = 9)

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2.3 壓縮多個文件或者文件夾

public bool ZipManyFilesOrDictorys(IEnumerable<string> folderOrFileList, string zipedFile, string password)

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2.4?對壓縮包進行加密

public bool ZipManyFilesOrDictorys(IEnumerable<string> folderOrFileList, string zipedFile, string password)

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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 創建主鍵，注意命名空間的排序。/// 2016-5-7 YangHengLian增加了可以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所有文件夾里的文件 /// </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> /// 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,為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("壓縮文件不能為空！");}if (!File.Exists(zipFilePath)){throw new FileNotFoundException("壓縮文件不存在！");}//解壓文件夾為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">壓縮后的文件名稱(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){// 如果文件沒有找到，則報錯 if (!File.Exists(filePath)){throw new FileNotFoundException("文件：" + filePath + "沒有找到！");}// 如果壓縮后名字為空就默認使用源文件名稱作為壓縮文件名稱if (string.IsNullOrEmpty(zipedFileName)){string oldValue = Path.GetFileName(filePath);if (oldValue != null){zipedFileName = filePath.Replace(oldValue, "") + Path.GetFileNameWithoutExtension(filePath) + ".zip";}}// 如果壓縮后的文件名稱后綴名不是zip，就是加上zip，防止是一個亂碼文件if (Path.GetExtension(zipedFileName) != ".zip"){zipedFileName = zipedFileName + ".zip";}// 如果指定位置目錄不存在，創建該目錄 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">壓縮后生成的壓縮文件名,全路徑</param> public void ZipFile(string fileToZip, string zipedFile){// 如果文件沒有找到，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">壓縮后的文件名，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){//如果文件沒有找到，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{//創建當前文件夾entry = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/")); //加上 “/” 才會當成是文件夾創建 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;}} } ZipHelper

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出處：https://www.cnblogs.com/weixing/p/5478845.html

轉載于:https://www.cnblogs.com/mq0036/p/10522694.html

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