gzip_to_byte_array.java

package com.dash;

import java.io.*;
import java.io.FileOutputStream;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.Path;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;

public class Main {


    public static void main(String[] args) throws IOException {
        Path dir = Paths.get("C:\\Users\\dashd\\IdeaProjects\\");
        File zipFile = new File("C:\\Users\\dashd\\out.gz");

        FileOutputStream fos = new FileOutputStream(zipFile);
        GZIPOutputStream gos = new GZIPOutputStream(fos);

        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
            for (Path entry : stream) {
                if (entry.toFile().isFile()) {
                    FileInputStream fis = new FileInputStream(entry.toFile());
                    gos.write(fis.readAllBytes());
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        gos.close();
        fos.close();

        byte[] fileContent = Files.readAllBytes(zipFile.toPath());

    }
}