不用磁盘IO直接从对象创建zip文件

Question

注意：我更喜欢使用。NET framework库（而不是外部库）来完成此操作

Answer 1

是的，完全在内存中创建zip文件是可能的，下面是一个使用sharpzip库的示例（更新：末尾添加了使用ziparchive的示例）：

public static void Main()
{
    var fileContent = Encoding.UTF8.GetBytes(
        @"{
            ""fruit"":""apple"",
            ""taste"":""yummy""
          }"
        );


    var zipStream = new MemoryStream();
    var zip = new ZipOutputStream(zipStream);

    AddEntry("file0.json", fileContent, zip); //first file
    AddEntry("file1.json", fileContent, zip); //second file (with same content)

    zip.Close();

    //only for testing to see if the zip file is valid!
    File.WriteAllBytes("test.zip", zipStream.ToArray());
}

private static void AddEntry(string fileName, byte[] fileContent, ZipOutputStream zip)
{
    var zipEntry = new ZipEntry(fileName) {DateTime = DateTime.Now, Size = fileContent.Length};
    zip.PutNextEntry(zipEntry);
    zip.Write(fileContent, 0, fileContent.Length);
    zip.CloseEntry();
}

您可以使用Nuget命令pm>Install-Package sharpzipb获取sharpzip

更新：

public static void Main()
{
    var fileContent = Encoding.UTF8.GetBytes(
        @"{
            ""fruit"":""apple"",
            ""taste"":""yummy""
          }"
        );

    var zipContent = new MemoryStream();
    var archive = new ZipArchive(zipContent, ZipArchiveMode.Create);

    AddEntry("file1.json",fileContent,archive);
    AddEntry("file2.json",fileContent,archive); //second file (same content)

    archive.Dispose();

    File.WriteAllBytes("testa.zip",zipContent.ToArray());
}


private static void AddEntry(string fileName, byte[] fileContent,ZipArchive archive)
{
    var entry = archive.CreateEntry(fileName);
    using (var stream = entry.Open())
        stream.Write(fileContent, 0, fileContent.Length);

}