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Java Tutorial : Java IO (Java File - How to compress files in ZIP format - Single file)

Java Tutorial : Java IO (Java File - How to compress files in ZIP format - Single file)

Java Tutorial : Java IO (Java File - How to compress files in ZIP format - Single file)

 ZipDemo.java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipDemo
{
    public static void main(String[] args) throws IOException
    {
        ZipDemo zipDemo = new ZipDemo();
        File file = new File("D:/work/HelloWorld.java");
        zipDemo.zipFile("D:/work/java.zip", file);
    }

    private void zipFile(String outputZipFileName, File file)
            throws IOException
    {
        byte[] buffer = new byte[1024];

        /*
         * All Streams will be closed automatically because they
         * are within the "try-With-Resources" block.
         */
        try (FileOutputStream fos = new FileOutputStream(outputZipFileName);
                ZipOutputStream zos = new ZipOutputStream(fos);
                FileInputStream fin = new FileInputStream(file))
        {

            ZipEntry ze = new ZipEntry(file.getName());
            zos.putNextEntry(ze);

            int len;
            while ((len = fin.read(buffer)) > 0)
            {
                zos.write(buffer, 0, len);
            }

            /*
             * Closes the current ZIP entry and positions
             * the stream for writing the next entry.
             */
            zos.closeEntry();
        }

        System.out.println("Zip file is created...");
    }
    
}

Zip file is created...

Refer: 

https://docs.oracle.com/javase/8/docs/api/index.html?java/util/zip/ZipOutputStream.html 

https://docs.oracle.com/javase/8/docs/api/java/util/zip/ZipEntry.html