.Net Core 多文件打包压缩
最近项目需要实现多文件打包的功能,尝试了一些方法,最后发现使用 ICSharpCode.SharpZipLib 最符合项目的要求。
具体实现如下:
1.在 Nuget 中安装 ICSharpCode.SharpZipLib
2.将要打包的文件放到同个文件夹进行压缩:
①压缩文件夹
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1 /// <summary> 2 /// 压缩文件 3 /// </summary> 4 /// <param name="fileName">压缩后获得的文件名</param> 5 public static bool CompressFile(string dir, out string fileName) 6 { 7 string dest = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop) + "\\" + string.Format("{0:yyyyMMddHHmmss}", DateTime.Now) + ".zip"; //默认压缩在桌面上 8 if (!Directory.Exists(Path.GetDirectoryName(dest))) //文件不存在就根据路径创建 E:\\test 9 Directory.CreateDirectory(Path.GetDirectoryName(dest)); 10 using (ZipOutputStream zipStream = new ZipOutputStream(File.Create(dest))) 11 { 12 zipStream.SetLevel(6); //压缩级别0-9 13 CreateZip(dir, zipStream); 14 fileName = dest; 15 zipStream.Finish(); 16 zipStream.Close(); 17 } 18 return true; 19 } 20 /// <summary> 21 /// 压缩内容到 zipStream 流中 22 /// </summary> 23 /// <param name="source">源文件</param> 24 /// <param name="zipStream">目标文件流(全路径+文件名+.zip)</param> 25 26 private static void CreateZip(string source, ZipOutputStream zipStream) 27 { 28 Crc32 crc = new Crc32(); 29 string[] files = Directory.GetFileSystemEntries(source); //获得所有文件名称和目录名称 30 foreach (var file in files) 31 { 32 if (Directory.Exists(file)) //如果是文件夹里有文件则递归 33 { 34 CreateZip(file, zipStream); 35 } 36 else //如果不是则压缩 37 { 38 using (FileStream fs = File.OpenRead(file)) 39 { 40 byte[] buffer = new byte[fs.Length]; 41 fs.Read(buffer, 0, buffer.Length); 42 string tempFileName = file.Substring(file.LastIndexOf("\\") + 1); //获得当前文件路径的文件名 43 ZipEntry entry = new ZipEntry(tempFileName); 44 entry.DateTime = DateTime.Now; 45 entry.Size = fs.Length; 46 fs.Close(); 47 crc.Reset(); 48 crc.Update(buffer); 49 entry.Crc = crc.Value; 50 zipStream.PutNextEntry(entry); 51 zipStream.Write(buffer, 0, buffer.Length); 52 } 53 } 54 } 55 }
②将指定文件打包压缩 (可打包线上文件)
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/// <summary> /// 打包线上线下文件 /// </summary> /// <param name="fileList">文件列表</param> /// <param name="savepath">保存路径</param> public static void ZipOnlineFile3(List<string> fileList, string savepath) { //判断保存的文件目录是否存在 if (!File.Exists(savepath)) { var file = new FileInfo(savepath); if (!file.Directory.Exists) { file.Directory.Create(); } } Crc32 crc = new Crc32(); using (ZipOutputStream zipStream = new ZipOutputStream(File.Create(savepath))) { zipStream.SetLevel(9); //压缩级别0-9 foreach (var url in fileList) { byte[] buffer = new WebClient().DownloadData(url); string tempFileName = GetFileNameByUrl(url); //获得当前文件路径的文件名 ZipEntry entry = new ZipEntry(tempFileName); entry.DateTime = DateTime.Now; entry.Size = buffer.Length; crc.Reset(); crc.Update(buffer); zipStream.PutNextEntry(entry); zipStream.Write(buffer, 0, buffer.Length); } } }
从文件路径读取文件名的方法:
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public static string GetFileNameByUrl(string url) { //判断路径是否为空 if (string.IsNullOrWhiteSpace(url)) return null; //判断是否为线上文件 if (url.ToLower().StartsWith("http")) { return url.Substring(url.LastIndexOf("/") + 1); } else { return url.Substring(url.LastIndexOf("\\") + 1); } }
通过此方法生成的压缩包,所有文件都会显示在同一层。
③如果需要在文件中创建目录,需要在文件名称上指定文件路径
添加工具类:
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1 /// <summary> 2 /// 文件对象 3 /// </summary> 4 public class FileItem 5 { 6 /// <summary> 7 /// 文件名称 8 /// </summary> 9 public string FileName { get; set; } 10 /// <summary> 11 /// 文件路径 12 /// </summary> 13 public string FileUrl { get; set; } 14 }
压缩文件的方法:
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1 /// <summary> 2 /// 打包线上线下文件 3 /// </summary> 4 /// <param name="zipName">压缩文件名称</param> 5 /// <param name="fileList">文件列表</param> 6 /// <param name="savepath">保存路径</param> 7 public static string ZipFiles(string zipName, List<FileItem> fileList, out string error) 8 { 9 error = string.Empty; 10 11 string path = string.Format("/files/zipFiles/{0}/{1}/{2}/", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day); 12 //文件保存目录 13 string directory = FileSavePath + path; 14 string url = FileHostUrl.TrimEnd('/') + path + zipName; 15 string savePath = directory + zipName; 16 17 try 18 { 19 if (!Directory.Exists(directory)) 20 { 21 Directory.CreateDirectory(directory); 22 } 23 24 using (ZipOutputStream zipStream = new ZipOutputStream(File.Create(savePath))) 25 { 26 zipStream.SetLevel(9); //压缩级别0-9 27 28 foreach (var item in fileList) 29 { 30 byte[] buffer = new WebClient().DownloadData(item.FileUrl); 31 ZipEntry entry = new ZipEntry(item.FileName); 32 entry.DateTime = DateTime.Now; 33 entry.Size = buffer.Length; 34 zipStream.PutNextEntry(entry); 35 zipStream.Write(buffer, 0, buffer.Length); 36 } 37 } 38 } 39 catch (Exception ex) 40 { 41 error = "文件打包失败:" + ex.Message; 42 } 43 44 return url; 45 }
调用参数示例:
{ "zipName": "test.zip", "fileList": [ { "fileName": "123.png", "fileUrl": "https://file.yidongcha.cn/files/uploadfiles/image/2021/11/15/11c6de395fcc484faf4745ade62cf6e6.png" }, { "fileName": "123/456/789.jpg", "fileUrl": "https://file.yidongcha.cn/files/uploadfiles/image/2021/11/15/fe922b250acf4344b8ca4d2aad6e0355.jpg" } ] }
生成的结果: