using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Compression;
using System.IO;
namespace CompressSample
{
/// <summary>
/// GZip的压缩方式
/// </summary>
public class GZipCompress
{
/// <summary>
/// 压缩字节数组
/// </summary>
/// <param name="str"></param>
public static byte[] Compress(byte[] inputBytes)
{
using (MemoryStream outStream = new MemoryStream())
{
using (GZipStream zipStream = new GZipStream(outStream, CompressionMode.Compress, true))
{
zipStream.Write(inputBytes, 0, inputBytes.Length);
zipStream.Close(); //很重要,必须关闭,否则无法正确解压
return outStream.ToArray();
}
}
}
/// <summary>
/// 解压缩字节数组
/// </summary>
/// <param name="str"></param>
public static byte[] Decompress(byte[] inputBytes)
{
using (MemoryStream inputStream = new MemoryStream(inputBytes))
{
using (MemoryStream outStream = new MemoryStream())
{
using (GZipStream zipStream = new GZipStream(inputStream, CompressionMode.Decompress))
{
zipStream.CopyTo(outStream);
zipStream.Close();
return outStream.ToArray();
}
}
}
}
/// <summary>
/// 压缩字符串
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static string Compress(string input)
{
byte[] inputBytes = Encoding.Default.GetBytes(input);
byte[] result = Compress(inputBytes);
return Convert.ToBase64String(result);
}
/// <summary>
/// 解压缩字符串
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static string Decompress(string input)
{
byte[] inputBytes = Convert.FromBase64String(input);
byte[] depressBytes = Decompress(inputBytes);
return Encoding.Default.GetString(depressBytes);
}
/// <summary>
/// 压缩目录
/// </summary>
/// <param name="dir"></param>
public static void Compress(DirectoryInfo dir)
{
foreach (FileInfo fileToCompress in dir.GetFiles())
{
Compress(fileToCompress);
}
}
/// <summary>
/// 解压缩目录
/// </summary>
/// <param name="dir"></param>
public static void Decompress(DirectoryInfo dir)
{
foreach (FileInfo fileToCompress in dir.GetFiles())
{
Decompress(fileToCompress);
}
}
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="fileToCompress"></param>
public static void Compress(FileInfo fileToCompress)
{
using (FileStream originalFileStream = fileToCompress.OpenRead())
{
if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fileToCompress.Extension != ".gz")
{
using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + ".gz"))
{
using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
{
originalFileStream.CopyTo(compressionStream);
}
}
}
}
}
/// <summary>
/// 解压缩文件
/// </summary>
/// <param name="fileToDecompress"></param>
public static void Decompress(FileInfo fileToDecompress)
{
using (FileStream originalFileStream = fileToDecompress.OpenRead())
{
string currentFileName = fileToDecompress.FullName;
string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);
using (FileStream decompressedFileStream = File.Create(newFileName))
{
using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress))
{
decompressionStream.CopyTo(decompressedFileStream);
}
}
}
}
}
}
C# 使用System.IO.Compression 进行压缩
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转载自blog.csdn.net/weixin_37744986/article/details/82711713
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