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C# ZipHelper C#公共类 压缩和解压 (转)

2022年07月19日76lyhabc

关于本文档的说明

  本文档基于ICSharpCode.SharpZipLib.dll的封装,常用的解压和压缩方法都已经涵盖在内,都是经过项目实战积累下来的

1.基本介绍

      由于项目中需要用到各种压缩将文件进行压缩下载,减少网络的带宽,所以压缩是一个非常常见的功能,对于压缩微软自己也提供了一些类库

  1. 微软自带压缩类ZipArchive类,适合NET FrameWork4.5才可以使用
  2. 调用压缩软件命令执行压缩动作,这个就需要电脑本身安装压缩软件了
  3. 使用第三方的压缩dll文件,一般使用最多的是(ICSharpCode.SharpZipLib.dll),下载dll ICSharpCode.SharpZipLib.zip

2.实际项目

  1. 压缩单个文件,需要指定压缩等级
  2. 压缩单个文件夹,需要指定压缩等级
  3. 压缩多个文件或者多个文件夹
  4. 对压缩包进行加密【用的较少,实际情况也有】
  5. 直接解压,无需密码
  6. 需要密码解压

2.1 压缩单个文件

写了两个方法,可以指定压缩等级,这样你的压缩包大小就不一样了

2.2 压缩单个文件夹

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

2.3 压缩多个文件或者文件夹

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

2.4 对压缩包进行加密

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

2.5 直接解压,无需密码

public void UnZip(string zipFilePath, string unZipDir)

3.演示图

3.ZipHelper下载

复制代码
//------------------------------------------------------------------------------------- 
// 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压缩帮助类 /// /// 修改纪录 /// /// 2015-09-16 版本:1.0 YangHengLian 创建主键,注意命名空间的排序。 /// 2016-5-7 YangHengLian增加了可以支持多个文件或者多个文件夹打包成一个zip文件 /// /// 版本:1.0 /// /// <author> /// <name>YangHengLian</name> /// <date>2015-09-16</date> /// </author> /// </summary> public class ZipHelper { /// <summary> /// 压缩文件夹 /// </summary> /// <param name="dirToZip"></param> /// <param name="zipedFileName"></param> /// <param name="compressionLevel">压缩率0(无压缩)9(压缩率最高)</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> /// 获取所有文件 /// </summary> /// <returns></returns> public Hashtable GetAllFies(string dir) { Hashtable filesList = new Hashtable(); DirectoryInfo fileDire = new DirectoryInfo(dir); if (!fileDire.Exists) { throw new FileNotFoundException("目录:" + fileDire.FullName + "没有找到!"); } GetAllDirFiles(fileDire, filesList); GetAllDirsFiles(fileDire.GetDirectories(), filesList); return filesList; } /// <summary> /// 获取一个文件夹下的所有文件夹里的文件 /// </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> /// 获取一个文件夹下的文件 /// </summary> /// <param name="dir">目录名称</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 void UnZip(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 FileNotFoundException("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); 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> /// 压缩单个文件 /// </summary> /// <param name="filePath">被压缩的文件名称(包含文件路径),文件的全路径</param> /// <param name="zipedFileName">压缩后的文件名称(包含文件路径),保存的文件名称</param> /// <param name="compressionLevel">压缩率0(无压缩)到 9(压缩率最高)</param> public void ZipFile(string filePath, string zipedFileName, int compressionLevel = 9) { // 如果文件没有找到,则报错 if (!File.Exists(filePath)) { throw new FileNotFoundException("文件:" + filePath + "没有找到!"); } // 如果压缩后名字为空就默认使用源文件名称作为压缩文件名称 if (string.IsNullOrEmpty(zipedFileName)) { string oldValue = Path.GetFileName(filePath); if (oldValue != null) { zipedFileName = filePath.Replace(oldValue, "") + Path.GetFileNameWithoutExtension(filePath) + ".zip"; } } // 如果压缩后的文件名称后缀名不是zip,就是加上zip,防止是一个乱码文件 if (Path.GetExtension(zipedFileName) != ".zip") { zipedFileName = zipedFileName + ".zip"; } // 如果指定位置目录不存在,创建该目录 C:\Users\yhl\Desktop\大汉三通 string zipedDir = zipedFileName.Substring(0, zipedFileName.LastIndexOf("\\", StringComparison.Ordinal)); if (!Directory.Exists(zipedDir)) { Directory.CreateDirectory(zipedDir); } // 被压缩文件名称 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> /// 压缩单个文件 /// </summary> /// <param name="fileToZip">要进行压缩的文件名,全路径</param> /// <param name="zipedFile">压缩后生成的压缩文件名,全路径</param> public void ZipFile(string fileToZip, string zipedFile) { // 如果文件没有找到,则报错 if (!File.Exists(fileToZip)) { throw new FileNotFoundException("指定要压缩的文件: " + 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> /// 压缩多个目录或文件 /// </summary> /// <param name="folderOrFileList">待压缩的文件夹或者文件,全路径格式,是一个集合</param> /// <param name="zipedFile">压缩后的文件名,全路径格式</param> /// <param name="password">压宿密码</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) { //是文件夹 if (Directory.Exists(fileOrDir)) { res = ZipFileDictory(fileOrDir, s, ""); } else { //文件 res = ZipFileWithStream(fileOrDir, s); } } s.Finish(); s.Close(); return res; } } /// <summary> /// 带压缩流压缩单个文件 /// </summary> /// <param name="fileToZip">要进行压缩的文件名</param> /// <param name="zipStream"></param> /// <returns></returns> private bool ZipFileWithStream(string fileToZip, ZipOutputStream zipStream) { //如果文件没有找到,则报错 if (!File.Exists(fileToZip)) { throw new FileNotFoundException("指定要压缩的文件: " + 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> /// 递归压缩文件夹方法 /// </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 { //创建当前文件夹 entry = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/")); //加上 “/” 才会当成是文件夹创建  s.PutNextEntry(entry); s.Flush(); //先压缩文件,再递归压缩文件夹 var filenames = Directory.GetFiles(folderToZip); foreach (string file in filenames) { //打开压缩文件 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; } } }
复制代码
https://www.cnblogs.com/weixing/p/5478845.html

本文参考链接:https://www.cnblogs.com/xihong2014/p/12163479.html