.NET C# 将文件夹压缩至 zip
文章目录
- .NET C# 将文件夹压缩至 zip
- 1 使用 System.IO.Compression
- 1.1 环境
- 1.2 压缩文件夹
- 1.2.1 简单压缩
- 1.2.2 复杂压缩
- 1.3 解压缩
- 1.3.1 简单解压缩
- 1.3.2 复杂解压缩
- 2 使用 SharpZipLib
- 2.1 环境
- 2.2 压缩文件夹
- 2.3 解压缩
- 3 压缩效果简单测试
1 使用 System.IO.Compression
1.1 环境
- .NET 6
1.2 压缩文件夹
1.2.1 简单压缩
using System.IO.Compression;string sourceDirectory = @"C:\path\to\your\folder"; // 需要压缩的文件夹路径
string destinationZipFilePath = @"C:\path\to\your\output.zip"; // 生成的zip文件路径
// 压缩文件夹
ZipFile.CreateFromDirectory(sourceDirectory, destinationZipFilePath);
注意事项
- 请确保路径正确,并且具有对该路径的读写权限。
- 如果目标zip文件已存在,该方法将覆盖该文件。如果你想避免覆盖,可以在压缩前检查文件是否存在,并进行相应处理。
1.2.2 复杂压缩
如果你需要更复杂的压缩选项,比如排除某些文件或文件夹,可以使用ZipArchive
类来进行更细粒度的控制。
using System.IO.Compression;string sourceDirectory = @"C:\path\to\your\folder";
string destinationZipFilePath = @"C:\path\to\your\output.zip";using (FileStream zipToOpen = new FileStream(destinationZipFilePath, FileMode.Create))
{using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Create)){DirectoryInfo directorySelected = new DirectoryInfo(sourceDirectory);foreach (FileInfo fileToCompress in directorySelected.GetFiles()){// 过滤特定文件(例如,排除所有.txt文件)if (fileToCompress.Extension == ".txt")continue;archive.CreateEntryFromFile(fileToCompress.FullName, fileToCompress.Name);}}
}
1.3 解压缩
1.3.1 简单解压缩
using System.IO.Compression;string sourceZipFilePath = @"C:\path\to\your\archive.zip"; // 需要解压缩的zip文件路径
string destinationDirectory = @"C:\path\to\your\output\folder"; // 解压缩到的目标文件夹路径
// 解压缩zip文件
ZipFile.ExtractToDirectory(sourceZipFilePath, destinationDirectory);
注意事项
- 请确保路径正确,并且具有对该路径的读写权限。
- 如果目标文件夹已存在且包含与zip文件中相同名称的文件,该方法将抛出异常。如果你想避免此问题,可以在解压缩前检查文件夹是否存在,并进行相应处理。
1.3.2 复杂解压缩
using System.IO.Compression;string sourceZipFilePath = @"C:\path\to\your\archive.zip";
string destinationDirectory = @"C:\path\to\your\output\folder";using (ZipArchive archive = ZipFile.OpenRead(sourceZipFilePath))
{foreach (ZipArchiveEntry entry in archive.Entries){// 解压缩所有文件到目标文件夹string destinationPath = Path.Combine(destinationDirectory, entry.FullName);// 如果条目是目录,则创建目录if (entry.Name == ""){Directory.CreateDirectory(destinationPath);}else{// 创建包含该条目的目录Directory.CreateDirectory(Path.GetDirectoryName(destinationPath));// 解压缩文件entry.ExtractToFile(destinationPath, overwrite: true);}}
}
2 使用 SharpZipLib
2.1 环境
- .NET 6
- SharpZipLib 1.4.2
2.2 压缩文件夹
using System;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;class Program
{static void Main(){string sourceDirectory = @"C:\path\to\your\folder"; // 需要压缩的文件夹路径string destinationZipFilePath = @"C:\path\to\your\output.zip"; // 生成的zip文件路径// 压缩文件夹CompressFolder(sourceDirectory, destinationZipFilePath);Console.WriteLine("文件夹已成功压缩到 " + destinationZipFilePath);}static void CompressFolder(string sourceDir, string zipFilePath){// 创建目标zip文件using (FileStream fsOut = File.Create(zipFilePath))using (ZipOutputStream zipStream = new ZipOutputStream(fsOut)){zipStream.SetLevel(3); // 设置压缩级别(0-9)// 遍历源文件夹中的所有文件和目录int folderOffset = sourceDir.Length + (sourceDir.EndsWith("\\") ? 0 : 1);CompressDirectory(sourceDir, zipStream, folderOffset);}}static void CompressDirectory(string path, ZipOutputStream zipStream, int folderOffset){string[] files = Directory.GetFiles(path);foreach (string filename in files){FileInfo fi = new FileInfo(filename);string entryName = filename.Substring(folderOffset); // 创建条目名entryName = ZipEntry.CleanName(entryName); // 清理名称ZipEntry newEntry = new ZipEntry(entryName);newEntry.DateTime = fi.LastWriteTime; // 设置条目的日期时间newEntry.Size = fi.Length; // 设置条目的大小zipStream.PutNextEntry(newEntry);// 写入文件内容byte[] buffer = new byte[4096];using (FileStream streamReader = File.OpenRead(filename)){StreamUtils.Copy(streamReader, zipStream, buffer);}zipStream.CloseEntry();}// 递归处理目录string[] folders = Directory.GetDirectories(path);foreach (string folder in folders){CompressDirectory(folder, zipStream, folderOffset);}}
}
2.3 解压缩
using System;
using System.IO;
using ICSharpCode.SharpZipLib.Core;
using ICSharpCode.SharpZipLib.Zip;class Program
{static void Main(){string sourceZipFilePath = @"C:\path\to\your\archive.zip"; // 需要解压缩的zip文件路径string destinationDirectory = @"C:\path\to\your\output\folder"; // 解压缩到的目标文件夹路径// 解压缩zip文件ExtractZipFile(sourceZipFilePath, destinationDirectory);Console.WriteLine("文件已成功解压缩到 " + destinationDirectory);}static void ExtractZipFile(string archiveFilenameIn, string outFolder){ZipFile zf = null;try{FileStream fs = File.OpenRead(archiveFilenameIn);zf = new ZipFile(fs);foreach (ZipEntry zipEntry in zf){if (!zipEntry.IsFile){continue; // 忽略目录条目}string entryFileName = zipEntry.Name;string fullZipToPath = Path.Combine(outFolder, entryFileName);string directoryName = Path.GetDirectoryName(fullZipToPath);// 创建目录if (directoryName.Length > 0){Directory.CreateDirectory(directoryName);}byte[] buffer = new byte[4096]; // 4K是推荐的缓冲区大小// 解压缩文件using (Stream zipStream = zf.GetInputStream(zipEntry))using (FileStream streamWriter = File.Create(fullZipToPath)){StreamUtils.Copy(zipStream, streamWriter, buffer);}}}finally{if (zf != null){zf.IsStreamOwner = true; // 使ZipFile也关闭文件流zf.Close();}}}
}
3 压缩效果简单测试
组件 | 压缩等级 | 耗时(ms) | 结果数据大小(KB) |
---|---|---|---|
System.IO.Compression | 1 | 24233 | 360197 |
5 | 35895 | 354376 | |
9 | 137136 | 351221 | |
SharpZipLib | NoCompression | 856 | 1046400 |
Fastest | 11571 | 373848 | |
Optimal | 18642 | 353490 | |
SmallestSize | 85536 | 351208 |