文件或文件夹的压缩

最新推荐文章于 2021-02-16 08:19:50 发布

转载最新推荐文章于 2021-02-16 08:19:50 发布 · 130 阅读

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/dener/p/6116352.html

首先创建一个压缩类

public class ZipHelper
    {
        /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="sourceFilePath"></param>
        /// <param name="destinationZipFilePath"></param>
        public static void CreateZip(string sourceFilePath, string destinationZipFilePath)
        {
            if (sourceFilePath[sourceFilePath.Length - 1] != System.IO.Path.DirectorySeparatorChar)
                sourceFilePath += System.IO.Path.DirectorySeparatorChar;
            ZipOutputStream zipStream = new ZipOutputStream(File.Create(destinationZipFilePath));
            zipStream.SetLevel(6); // 压缩级别 0-9
            CreateZipFiles(sourceFilePath, zipStream);
            zipStream.Finish();
            zipStream.Close();
        }
        /// <summary>
        /// 递归压缩文件
        /// </summary>
        /// <param name="sourceFilePath">待压缩的文件或文件夹路径</param>
        /// <param name="zipStream">打包结果的zip文件路径（类似 D:\WorkSpace\a.zip）,全路径包括文件名和.zip扩展名</param>
        /// <param name="staticFile"></param>
        private static void CreateZipFiles(string sourceFilePath, ZipOutputStream zipStream)
        {
            Crc32 crc = new Crc32();
            string[] filesArray = Directory.GetFileSystemEntries(sourceFilePath);
            foreach (string file in filesArray)
            {
                if (Directory.Exists(file))                     //如果当前是文件夹，递归
                {
                    CreateZipFiles(file, zipStream);
                }
                else                                            //如果是文件，开始压缩
                {
                    FileStream fileStream = File.OpenRead(file);
                    byte[] buffer = new byte[fileStream.Length];
                    fileStream.Read(buffer, 0, buffer.Length);
                    string tempFile = file.Substring(sourceFilePath.LastIndexOf("\\") + 1);
                    ZipEntry entry = new ZipEntry(tempFile);
                    entry.DateTime = DateTime.Now;
                    entry.Size = fileStream.Length;
                    fileStream.Close();
                    crc.Reset();
                    crc.Update(buffer);
                    entry.Crc = crc.Value;
                    zipStream.PutNextEntry(entry);
                    zipStream.Write(buffer, 0, buffer.Length);
                }
            }
        }
    }
然后在进行调用就可以了

public ActionResult DownAll()
{
var msg = new JsonMessage(false,"下载失败！");

　　　　//源文件夹
string path = System.Web.HttpContext.Current.Server.MapPath("/UploadFile/Qrcode");

　　　　//压缩目的文件夹，注意末尾要写上压缩的文件的后缀名
            string path1 = System.Web.HttpContext.Current.Server.MapPath("/UploadFile/Qrcode.zip");
            ZipHelper.CreateZip(@""+path, @"" + path1);
            var name = Path.GetFileName(path1);
            return File(path1, "application/x-zip-compressed", name);
        }

转载于:https://www.cnblogs.com/dener/p/6116352.html