改造了网上的代码，可以压缩文件夹、指定文件列表（文件和文件夹的混合列表，需要指定子文件夹下需要压缩的文件），注释很详细不做解释

    public class ZipHelper{/// <summary>/// 压缩单个文件/// </summary>/// <param name="fileToZip">要压缩的文件</param>/// <param name="zipedFile">压缩后的文件</param>/// <param name="compressionLevel">压缩等级</param>/// <param name="blockSize">每次写入大小</param>public static void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize){//如果文件没有找到，则报错if (!System.IO.File.Exists(fileToZip)){throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");}using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile)){using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile)){using (System.IO.FileStream StreamToZip = new System.IO.FileStream(fileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read)){string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);ZipEntry ZipEntry = new ZipEntry(fileName);ZipStream.PutNextEntry(ZipEntry);ZipStream.SetLevel(compressionLevel);byte[] buffer = new byte[blockSize];int sizeRead = 0;try{do{sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);ZipStream.Write(buffer, 0, sizeRead);}while (sizeRead > 0);}catch (System.Exception ex){throw ex;}StreamToZip.Close();}ZipStream.Finish();ZipStream.Close();}ZipFile.Close();}}/// <summary>/// 压缩单个文件/// </summary>/// <param name="fileToZip">要进行压缩的文件名</param>/// <param name="zipedFile">压缩后生成的压缩文件名</param>public static void ZipFile(string fileToZip, string zipedFile){//如果文件没有找到，则报错if (!File.Exists(fileToZip)){throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");}using (FileStream fs = File.OpenRead(fileToZip)){byte[] buffer = new byte[fs.Length];fs.Read(buffer, 0, buffer.Length);fs.Close();using (FileStream ZipFile = File.Create(zipedFile)){using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile)){string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);ZipEntry ZipEntry = new ZipEntry(fileName);ZipStream.PutNextEntry(ZipEntry);ZipStream.SetLevel(5);ZipStream.Write(buffer, 0, buffer.Length);ZipStream.Finish();ZipStream.Close();}}}}/// <summary>/// 压缩文件/// </summary>        /// <param name="copyTopath">压缩到哪个路径</param>/// <param name="zipFileName">压缩文件名称</param>public static void ZipFile(List<string> sourceFileNames, string zipFileName){//压缩文件打包using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFileName))){s.SetLevel(9);byte[] buffer = new byte[4096];foreach (string file in sourceFileNames){if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
                    {string pPath = "";pPath += Path.GetFileName(file);pPath += "\\";ZipSetp(file, s, pPath, sourceFileNames);}else // 否则直接压缩文件
                    {ZipEntry entry = new ZipEntry(Path.GetFileName(file));entry.DateTime = DateTime.Now;s.PutNextEntry(entry);using (FileStream fs = File.OpenRead(file)){int sourceBytes;do{sourceBytes = fs.Read(buffer, 0, buffer.Length);s.Write(buffer, 0, sourceBytes);} while (sourceBytes > 0);}}}s.Finish();s.Close();}}/// <summary>/// 压缩多层目录/// </summary>/// <param name="strDirectory">待压缩目录</param>/// <param name="zipedFile">压缩后生成的压缩文件名，绝对路径</param>public static void ZipFileDirectory(string strDirectory, string zipedFile){using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile)){using (ZipOutputStream s = new ZipOutputStream(ZipFile)){s.SetLevel(9);ZipSetp(strDirectory, s, "");}}}/// <summary>/// 压缩多层目录/// </summary>/// <param name="strDirectory">待压缩目录</param>/// <param name="zipedFile">压缩后生成的压缩文件名，绝对路径</param>/// <param name="files">指定要压缩的文件列表(完全路径)</param>public static void ZipFileDirectory(string strDirectory, string zipedFile, List<string> files){using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile)){using (ZipOutputStream s = new ZipOutputStream(ZipFile)){s.SetLevel(9);ZipSetp(strDirectory, s, "", files);}}}/// <summary>/// 递归遍历目录/// </summary>/// <param name="strDirectory">The directory.</param>/// <param name="s">The ZipOutputStream Object.</param>/// <param name="parentPath">The parent path.</param>/// <param name="files">需要压缩的文件</param>private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath, List<string> files = null){if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar){strDirectory += Path.DirectorySeparatorChar;}string[] filenames = Directory.GetFileSystemEntries(strDirectory);byte[] buffer = new byte[4096];foreach (string file in filenames)// 遍历所有的文件和目录
            {if (files != null && !files.Contains(file)){continue;}if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
                {string pPath = parentPath;pPath += Path.GetFileName(file);pPath += "\\";ZipSetp(file, s, pPath, files);}else // 否则直接压缩文件
                {//打开压缩文件string fileName = parentPath + Path.GetFileName(file);ZipEntry entry = new ZipEntry(fileName);entry.DateTime = DateTime.Now;s.PutNextEntry(entry);using (FileStream fs = File.OpenRead(file)){int sourceBytes;do{sourceBytes = fs.Read(buffer, 0, buffer.Length);s.Write(buffer, 0, sourceBytes);} while (sourceBytes > 0);}}}}/// <summary>/// 解压缩一个 zip 文件。/// </summary>/// <param name="zipedFile">压缩文件</param>/// <param name="strDirectory">解压目录</param>/// <param name="password">zip 文件的密码。</param>/// <param name="overWrite">是否覆盖已存在的文件。</param>public static void UnZip(string zipedFile, string strDirectory, bool overWrite, string password){if (strDirectory == "")strDirectory = Directory.GetCurrentDirectory();if (!strDirectory.EndsWith("\\"))strDirectory = strDirectory + "\\";using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipedFile))){if (password != null){s.Password = password;}ZipEntry theEntry;while ((theEntry = s.GetNextEntry()) != null){string directoryName = "";string pathToZip = "";pathToZip = theEntry.Name;if (pathToZip != "")directoryName = Path.GetDirectoryName(pathToZip) + "\\";string fileName = Path.GetFileName(pathToZip);Directory.CreateDirectory(strDirectory + directoryName);if (fileName != ""){if ((File.Exists(strDirectory + directoryName + fileName) && overWrite) || (!File.Exists(strDirectory + directoryName + fileName))){using (FileStream streamWriter = File.Create(strDirectory + directoryName + fileName)){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);elsebreak;}streamWriter.Close();}}}}s.Close();}}/// <summary>/// 解压缩一个 zip 文件。/// </summary>/// <param name="zipedFile">压缩文件</param>/// <param name="strDirectory">解压目录</param>/// <param name="overWrite">是否覆盖已存在的文件。</param>public static void UnZip(string zipedFile, string strDirectory, bool overWrite){UnZip(zipedFile, strDirectory, overWrite, null);}/// <summary>/// 解压缩一个 zip 文件。/// 覆盖已存在的文件。/// </summary>/// <param name="zipedFile">压缩文件</param>/// <param name="strDirectory">解压目录</param>public static void UnZip(string zipedFile, string strDirectory){UnZip(zipedFile, strDirectory, true);}/// <summary>/// 获取压缩文件中指定类型的文件/// </summary>/// <param name="zipedFile">压缩文件</param>/// <param name="fileExtension">文件类型(.txt|.exe)</param>/// <returns>文件名称列表(包含子目录)</returns>public static List<string> GetFiles(string zipedFile, List<string> fileExtension){List<string> files = new List<string>();if (!File.Exists(zipedFile)){//return files;throw new FileNotFoundException(zipedFile);}using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipedFile))){ZipEntry theEntry;while ((theEntry = s.GetNextEntry()) != null){if (theEntry.IsFile){//Console.WriteLine("Name : {0}", theEntry.Name);if (fileExtension != null){if (fileExtension.Contains(Path.GetExtension(theEntry.Name))){files.Add(theEntry.Name);}}else{files.Add(theEntry.Name);}}}s.Close();}return files;}/// <summary>/// 获取压缩文件中的所有文件/// </summary>/// <param name="zipedFile">压缩文件</param>/// <returns>文件名称列表(包含子目录)</returns>public static List<string> GetFiles(string zipedFile){return GetFiles(zipedFile, null);}}