C#压缩JSON数据的技巧

在C#中压缩JSON数据可以使用GZipStream类。以下是一个示例代码：

using System;
    
using System.IO;
    
using System.IO.Compression;
    
using System.Text;


public class JsonCompression
{

    public static string Compress(string json)
    {
    
        byte[] buffer = Encoding.UTF8.GetBytes(json);

        using (MemoryStream ms = new MemoryStream())
        {

            using (GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true))
            {
    
                zip.Write(buffer, 0, buffer.Length);

            }
    

            ms.Position = 0;
    
            byte[] compressed = new byte[ms.Length];
    
            ms.Read(compressed, 0, compressed.Length);
    

            byte[] gzBuffer = new byte[compressed.Length + 4];
    
            System.Buffer.BlockCopy(compressed, 0, gzBuffer, 4, compressed.Length);
    
            System.Buffer.BlockCopy(BitConverter.GetBytes(buffer.Length), 0, gzBuffer, 0, 4);
    
            return Convert.ToBase64String(gzBuffer);

        }

    }


    public static string Decompress(string compressedJson)
    {
    
        byte[] gzBuffer = Convert.FromBase64String(compressedJson);

        using (MemoryStream ms = new MemoryStream())
        {
    
            int msgLength = BitConverter.ToInt32(gzBuffer, 0);
    
            ms.Write(gzBuffer, 4, gzBuffer.Length - 4);
    

            byte[] buffer = new byte[msgLength];
    

            ms.Position = 0;

            using (GZipStream zip = new GZipStream(ms, CompressionMode.Decompress))
            {
    
                zip.Read(buffer, 0, buffer.Length);

            }
    

            return Encoding.UTF8.GetString(buffer);

        }

    }

}

使用示例：

string json = "{
\"name\": \"John\", \"age\": 30}
    ";
    
string compressedJson = JsonCompression.Compress(json);
    
string decompressedJson = JsonCompression.Decompress(compressedJson);


Console.WriteLine($"Original JSON: {
json}
    ");

Console.WriteLine($"Compressed JSON: {
compressedJson}
    ");

Console.WriteLine($"Decompressed JSON: {
decompressedJson}
    ");
    

在上面的示例中，Compress方法将JSON数据压缩成Base64字符串，而Decompress方法将压缩后的Base64字符串解压缩为原始JSON数据。

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