时间:2023-02-10 10:12:54 | 栏目:.NET代码 | 点击:次
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压缩文件夹
/// <summary> /// 压缩文件 /// </summary> /// <param name="fileName">压缩后获得的文件名</param> public static bool CompressFile(string dir, out string fileName) { string dest = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop) + "\\" + string.Format("{0:yyyyMMddHHmmss}", DateTime.Now) + ".zip"; //默认压缩在桌面上 if (!Directory.Exists(Path.GetDirectoryName(dest))) //文件不存在就根据路径创建 E:\\test Directory.CreateDirectory(Path.GetDirectoryName(dest)); using (ZipOutputStream zipStream = new ZipOutputStream(File.Create(dest))) { zipStream.SetLevel(6); //压缩级别0-9 CreateZip(dir, zipStream); fileName = dest; zipStream.Finish(); zipStream.Close(); } return true; } /// <summary> /// 压缩内容到 zipStream 流中 /// </summary> /// <param name="source">源文件</param> /// <param name="zipStream">目标文件流(全路径+文件名+.zip)</param> private static void CreateZip(string source, ZipOutputStream zipStream) { Crc32 crc = new Crc32(); string[] files = Directory.GetFileSystemEntries(source); //获得所有文件名称和目录名称 foreach (var file in files) { if (Directory.Exists(file)) //如果是文件夹里有文件则递归 { CreateZip(file, zipStream); } else //如果不是则压缩 { using (FileStream fs = File.OpenRead(file)) { byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); string tempFileName = file.Substring(file.LastIndexOf("\\") + 1); //获得当前文件路径的文件名 ZipEntry entry = new ZipEntry(tempFileName); entry.DateTime = DateTime.Now; entry.Size = fs.Length; fs.Close(); crc.Reset(); crc.Update(buffer); entry.Crc = crc.Value; zipStream.PutNextEntry(entry); zipStream.Write(buffer, 0, buffer.Length); } } } }
②将指定文件打包压缩 (可打包线上文件)
/// <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:
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:
/// <summary> /// 文件对象 /// </summary> public class FileItem { /// <summary> /// 文件名称 /// </summary> public string FileName { get; set; } /// <summary> /// 文件路径 /// </summary> public string FileUrl { get; set; } } 压缩文件的方法: /// <summary> /// 打包线上线下文件 /// </summary> /// <param name="zipName">压缩文件名称</param> /// <param name="fileList">文件列表</param> /// <param name="savepath">保存路径</param> public static string ZipFiles(string zipName, List<FileItem> fileList, out string error) { error = string.Empty; string path = string.Format("/files/zipFiles/{0}/{1}/{2}/", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day); //文件保存目录 string directory = FileSavePath + path; string url = FileHostUrl.TrimEnd('/') + path + zipName; string savePath = directory + zipName; try { if (!Directory.Exists(directory)) { Directory.CreateDirectory(directory); } using (ZipOutputStream zipStream = new ZipOutputStream(File.Create(savePath))) { zipStream.SetLevel(9); //压缩级别0-9 foreach (var item in fileList) { byte[] buffer = new WebClient().DownloadData(item.FileUrl); ZipEntry entry = new ZipEntry(item.FileName); entry.DateTime = DateTime.Now; entry.Size = buffer.Length; zipStream.PutNextEntry(entry); zipStream.Write(buffer, 0, buffer.Length); } } } catch (Exception ex) { error = "文件打包失败:" + ex.Message; } return url; }
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: