121 lines
4.0 KiB
C#
121 lines
4.0 KiB
C#
using ICSharpCode.SharpZipLib.Checksum;
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namespace MiaoYu.Core.Zips;
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/// <summary>
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/// 压缩 zip https://www.cnblogs.com/xielong/p/6165550.html
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/// </summary>
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public class Zip
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{
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public Zip(string strFile, string strZip)
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{
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var len = strFile.Length;
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var strLen = strFile[len - 1];
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if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
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{
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strFile += Path.DirectorySeparatorChar;
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}
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using var outStream = new ZipOutputStream(File.Create(strZip));
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try
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{
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outStream.SetLevel(6);
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Execute(strFile, outStream, strFile);
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}
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finally
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{
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outStream.Finish();
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outStream.Close();
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}
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}
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private void Execute(string strFile, ZipOutputStream outStream, string staticFile)
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{
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if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
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{
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strFile += Path.DirectorySeparatorChar;
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}
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var crc = new Crc32();
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//获取指定目录下所有文件和子目录文件名称
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var filenames = Directory.GetFileSystemEntries(strFile);
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//遍历文件
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foreach (var file in filenames)
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{
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if (Directory.Exists(file))
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{
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Execute(file, outStream, staticFile);
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}
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//否则，直接压缩文件
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else
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{
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//打开文件
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using var fs = File.OpenRead(file);
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//定义缓存区对象
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var buffer = new byte[fs.Length];
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//通过字符流，读取文件
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fs.Read(buffer, 0, buffer.Length);
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//得到目录下的文件（比如:D:\Debug1\test）,test
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var tempFile = file.Substring(staticFile.LastIndexOf("\\", StringComparison.Ordinal) + 1);
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var entry = new ZipEntry(tempFile) { DateTime = DateTime.Now, Size = fs.Length };
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crc.Reset();
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crc.Update(buffer);
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entry.Crc = crc.Value;
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outStream.PutNextEntry(entry);
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//写文件
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outStream.Write(buffer, 0, buffer.Length);
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fs.Close();
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}
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}
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}
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/// <summary>
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/// 解压
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/// </summary>
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/// <param name="zipFile">压缩包文件名</param>
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/// <param name="targetPath">解压缩目标路径</param>
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public static string UnZip(string zipFile, string targetPath)
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{
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var directoryName = targetPath;
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if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName); //生成解压目录
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var currentDirectory = directoryName;
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var data = new byte[2048];
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var size = 2048;
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ZipEntry zipEntry = null;
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var theEntry = string.Empty;
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using var s = new ZipInputStream(File.OpenRead(zipFile));
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while ((zipEntry = s.GetNextEntry()) != null)
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{
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if (zipEntry.IsDirectory)
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{
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// 该结点是目录
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if (!Directory.Exists(currentDirectory + zipEntry.Name))
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Directory.CreateDirectory(currentDirectory + zipEntry.Name);
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//保存路径名
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if (!string.IsNullOrEmpty(zipEntry.Name) && zipEntry.Name.Contains("/"))
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theEntry = zipEntry.Name.Substring(0, zipEntry.Name.IndexOf('/'));
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}
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else
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{
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if (string.IsNullOrWhiteSpace(zipEntry.Name)) continue;
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//解压文件到指定的目录
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using var streamWriter = File.Create(currentDirectory + zipEntry.Name);
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while (true)
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{
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size = s.Read(data, 0, data.Length);
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if (size <= 0) break;
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streamWriter.Write(data, 0, size);
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}
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streamWriter.Close();
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}
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}
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s.Close();
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return "/" + theEntry; //返回压缩文件的路径
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}
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} |