• 周一. 6月 24th, 2024

5G编程聚合网

5G时代下一个聚合的编程学习网

热门标签

C# Zip压缩、解压

admin

11月 28, 2021
    /*
     *引用 NuGet包 ICSharpCode.SharpZipLib.dll
     */
    public class ZipUtility
    {
        /// <summary>  
        /// 所有文件缓存  
        /// </summary>  
        List<string> files = new List<string>();

        /// <summary>  
        /// 所有空目录缓存  
        /// </summary>  
        List<string> paths = new List<string>();

        /// <summary>  
        /// 压缩单个文件  
        /// </summary>  
        /// <param name="fileToZip">要压缩的文件</param>  
        /// <param name="zipedFile">压缩后的文件全名</param>  
        /// <param name="compressionLevel">压缩程度,范围0-9,数值越大,压缩程序越高</param>  
        /// <param name="blockSize">分块大小</param>  
        public void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize)
        {
            if (!System.IO.File.Exists(fileToZip))//如果文件没有找到,则报错  
            {
                throw new FileNotFoundException("The specified file " + fileToZip + " could not be found. Zipping aborderd");
            }

            FileStream streamToZip = new FileStream(fileToZip, FileMode.Open, FileAccess.Read);
            FileStream zipFile = File.Create(zipedFile);
            ZipOutputStream zipStream = new ZipOutputStream(zipFile);
            ZipEntry zipEntry = new ZipEntry(fileToZip);
            zipStream.PutNextEntry(zipEntry);
            zipStream.SetLevel(compressionLevel);
            byte[] buffer = new byte[blockSize];
            int 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;
                }
            }
            catch (Exception ex)
            {
                GC.Collect();
                throw ex;
            }

            zipStream.Finish();
            zipStream.Close();
            streamToZip.Close();
            GC.Collect();
        }

        /// <summary>  
        /// 压缩目录(包括子目录及所有文件)  
        /// </summary>  
        /// <param name="rootPath">要压缩的根目录</param>  
        /// <param name="destinationPath">保存路径</param>  
        /// <param name="compressLevel">压缩程度,范围0-9,数值越大,压缩程序越高</param>  
        public void ZipFileFromDirectory(string rootPath, string destinationPath, int compressLevel)
        {
            GetAllDirectories(rootPath);

            /* while (rootPath.LastIndexOf("\") + 1 == rootPath.Length)//检查路径是否以""结尾 
            { 

            rootPath = rootPath.Substring(0, rootPath.Length - 1);//如果是则去掉末尾的"" 

            } 
            */
            //string rootMark = rootPath.Substring(0, rootPath.LastIndexOf("\") + 1);//得到当前路径的位置,以备压缩时将所压缩内容转变成相对路径。  
            string rootMark = rootPath + "\";//得到当前路径的位置,以备压缩时将所压缩内容转变成相对路径。  
            Crc32 crc = new Crc32();
            ZipOutputStream outPutStream = new ZipOutputStream(File.Create(destinationPath));
            outPutStream.SetLevel(compressLevel); // 0 - store only to 9 - means best compression  
            foreach (string file in files)
            {
                FileStream fileStream = File.OpenRead(file);//打开压缩文件  
                byte[] buffer = new byte[fileStream.Length];
                fileStream.Read(buffer, 0, buffer.Length);
                ZipEntry entry = new ZipEntry(file.Replace(rootMark, string.Empty));
                entry.DateTime = DateTime.Now;

                entry.Size = fileStream.Length;
                fileStream.Close();
                crc.Reset();
                crc.Update(buffer);
                entry.Crc = crc.Value;
                outPutStream.PutNextEntry(entry);
                outPutStream.Write(buffer, 0, buffer.Length);
            }

            this.files.Clear();

            foreach (string emptyPath in paths)
            {
                ZipEntry entry = new ZipEntry(emptyPath.Replace(rootMark, string.Empty) + "/");
                outPutStream.PutNextEntry(entry);
            }

            this.paths.Clear();
            outPutStream.Finish();
            outPutStream.Close();
            GC.Collect();
        }

        /// <summary>  
        /// 取得目录下所有文件及文件夹,分别存入files及paths  
        /// </summary>  
        /// <param name="rootPath">根目录</param>  
        private void GetAllDirectories(string rootPath)
        {
            string[] subPaths = Directory.GetDirectories(rootPath);//得到所有子目录  
            foreach (string path in subPaths)
            {
                GetAllDirectories(path);//对每一个字目录做与根目录相同的操作:即找到子目录并将当前目录的文件名存入List  
            }
            string[] files = Directory.GetFiles(rootPath);
            foreach (string file in files)
            {
                this.files.Add(file);//将当前目录中的所有文件全名存入文件List  
            }
            if (subPaths.Length == files.Length && files.Length == 0)//如果是空目录  
            {
                this.paths.Add(rootPath);//记录空目录  
            }
        }

        /// <summary>  
        /// 解压缩文件(压缩文件中含有子目录)  
        /// </summary>  
        /// <param name="zipfilepath">待解压缩的文件路径</param>  
        /// <param name="unzippath">解压缩到指定目录</param>  
        /// <returns>解压后的文件列表</returns>  
        public List<string> UnZip(string zipfilepath, string unzippath)
        {
            //解压出来的文件列表  
            List<string> unzipFiles = new List<string>();

            //检查输出目录是否以“\”结尾  
            if (unzippath.EndsWith("\") == false || unzippath.EndsWith(":\") == false)
            {
                unzippath += "\";
            }

            ZipInputStream s = new ZipInputStream(File.OpenRead(zipfilepath));
            ZipEntry theEntry;
            while ((theEntry = s.GetNextEntry()) != null)
            {
                string directoryName = Path.GetDirectoryName(unzippath);
                string fileName = Path.GetFileName(theEntry.Name);

                //生成解压目录【用户解压到硬盘根目录时,不需要创建】  
                if (!string.IsNullOrEmpty(directoryName))
                {
                    Directory.CreateDirectory(directoryName);
                }

                if (fileName != String.Empty)
                {
                    //如果文件的压缩后大小为0那么说明这个文件是空的,因此不需要进行读出写入  
                    if (theEntry.CompressedSize == 0)
                        continue;
                    //解压文件到指定的目录  
                    directoryName = Path.GetDirectoryName(unzippath + theEntry.Name);
                    //建立下面的目录和子目录  
                    Directory.CreateDirectory(directoryName);

                    //记录导出的文件  
                    unzipFiles.Add(unzippath + theEntry.Name);

                    FileStream streamWriter = File.Create(unzippath + theEntry.Name);

                    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);
                        }
                        else
                        {
                            break;
                        }
                    }
                    streamWriter.Close();
                }
            }
            s.Close();
            GC.Collect();
            return unzipFiles;
        }

        public string GetZipFileExtention(string fileFullName)
        {
            int index = fileFullName.LastIndexOf(".");
            if (index <= 0)
            {
                throw new Exception("源包文件不是压缩文件");
            }

            //extension string
            string ext = fileFullName.Substring(index);

            if (ext == ".rar" || ext == ".zip")
            {
                return ext;
            }
            else
            {
                //The source package file is not a compress file
                throw new Exception("源包文件不是压缩文件");
            }
        }
    }

《C# Zip压缩、解压》有一个想法
  1. Wow, incredible weblog structure! How long have you been blogging for?
    you made blogging glance easy. The entire glance of your web
    site is wonderful, let alone the content material! You
    can see similar here sklep

发表回复

您的电子邮箱地址不会被公开。 必填项已用*标注