using ICSharpCode.SharpZipLib.Checksums;using ICSharpCode.SharpZipLib.Zip;namespace{/// <summary>      /// 文件(夹)压缩、解压缩      /// </summary>    /// <remarks>    /// 编制人员 ： sunbingqiang    /// 完成时间 ： 2017年8月8日10点29分    /// 修改历史 ： 无    /// </remarks>    public abstract class FileCompression    {        #region 压缩文件          /// <summary>            /// 压缩文件            /// </summary>            /// <param name="fileNames">要打包的文件列表</param>            /// <param name="GzipFileName">目标文件名</param>            /// <param name="CompressionLevel">压缩品质级别（0~9）</param>            /// <param name="deleteFile">是否删除原文件</param>          public static void CompressFile(List<FileInfo> fileNames, string GzipFileName, int CompressionLevel, bool deleteFile)        {            ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName));            try            {                s.SetLevel(CompressionLevel);   //0 - store only to 9 - means best compression                    foreach (FileInfo file in fileNames)                {                    FileStream fs = null;                    try                    {                        fs = file.Open(FileMode.Open, FileAccess.ReadWrite);                    }                    catch                    { continue; }                    //  方法二，将文件分批读入缓冲区                        byte[] data = http://www.mamicode.com/new byte[2048];                    int size = 2048;                    ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name));                    entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime);                    s.PutNextEntry(entry);                    while (true)                    {                        size = fs.Read(data, 0, size);                        if (size <= 0) break;                        s.Write(data, 0, size);                    }                    fs.Close();                    if (deleteFile)                    {                        file.Delete();                    }                }            }            finally            {                s.Finish();                s.Close();            }        }        /// <summary>            /// 压缩文件夹            /// </summary>            /// <param name="dirPath">要打包的文件夹</param>            /// <param name="GzipFileName">目标文件名</param>            /// <param name="CompressionLevel">压缩品质级别（0~9）</param>            /// <param name="deleteDir">是否删除原文件夹</param>          public static void CompressDirectory(string dirPath, string GzipFileName, int CompressionLevel, bool deleteDir)        {            //压缩文件为空时默认与压缩文件夹同一级目录                if (GzipFileName == string.Empty)            {                GzipFileName = dirPath.Substring(dirPath.LastIndexOf("//") + 1);                GzipFileName = dirPath.Substring(0, dirPath.LastIndexOf("//")) + "//" + GzipFileName + ".zip";            }            //if (Path.GetExtension(GzipFileName) != ".zip")              //{              //    GzipFileName = GzipFileName + ".zip";              //}              using (ZipOutputStream zipoutputstream = new ZipOutputStream(File.Create(GzipFileName)))            {                zipoutputstream.SetLevel(CompressionLevel);                Crc32 crc = new Crc32();                Dictionary<string, DateTime> fileList = GetAllFies(dirPath);                foreach (KeyValuePair<string, DateTime> item in fileList)                {                    FileStream fs = File.OpenRead(item.Key.ToString());                    byte[] buffer = new byte[fs.Length];                    fs.Read(buffer, 0, buffer.Length);                    ZipEntry entry = new ZipEntry(item.Key.Substring(dirPath.Length));                    entry.DateTime = item.Value;                    entry.Size = fs.Length;                    fs.Close();                    crc.Reset();                    crc.Update(buffer);                    entry.Crc = crc.Value;                    zipoutputstream.PutNextEntry(entry);                    zipoutputstream.Write(buffer, 0, buffer.Length);                }            }            if (deleteDir)            {                Directory.Delete(dirPath, true);            }        }        /// <summary>            /// 获取所有文件            /// </summary>            /// <returns></returns>            private static Dictionary<string, DateTime> GetAllFies(string dir)        {            Dictionary<string, DateTime> FilesList = new Dictionary<string, DateTime>();            DirectoryInfo fileDire = new DirectoryInfo(dir);            if (!fileDire.Exists)            {                throw new System.IO.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>            private static void GetAllDirsFiles(DirectoryInfo[] dirs, Dictionary<string, DateTime> 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>            private static void GetAllDirFiles(DirectoryInfo dir, Dictionary<string, DateTime> filesList)        {            foreach (FileInfo file in dir.GetFiles("*.*"))            {                filesList.Add(file.FullName, file.LastWriteTime);            }        }        #endregion        /// <summary>            /// 解压缩文件            /// </summary>            /// <param name="GzipFile">压缩包文件名</param>            /// <param name="targetPath">解压缩目标路径</param>                   public static void Decompress(string GzipFile, string targetPath)        {            //string directoryName = Path.GetDirectoryName(targetPath + "//") + "//";                string directoryName = targetPath;            if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);//生成解压目录                string CurrentDirectory = directoryName;            byte[] data = http://www.mamicode.com/new byte[2048];            int size = 2048;            ZipEntry theEntry = null;            using (ZipInputStream s = new ZipInputStream(File.OpenRead(GzipFile)))            {                while ((theEntry = s.GetNextEntry()) != null)                {                    if (theEntry.IsDirectory)                    {// 该结点是目录                            if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name);                    }                    else                    {                        if (theEntry.Name != String.Empty)                        {                            //  检查多级目录是否存在                              if (theEntry.Name.Contains("//"))                            {                                string parentDirPath = theEntry.Name.Remove(theEntry.Name.LastIndexOf("//") + 1);                                if (!Directory.Exists(parentDirPath))                                {                                    Directory.CreateDirectory(CurrentDirectory + parentDirPath);                                }                            }                            //解压文件到指定的目录                                using (FileStream streamWriter = File.Create(CurrentDirectory + theEntry.Name))                            {                                while (true)                                {                                    size = s.Read(data, 0, data.Length);                                    if (size <= 0) break;                                    streamWriter.Write(data, 0, size);                                }                                streamWriter.Close();                            }                        }                    }                }                s.Close();            }        }        //end    }}