Java - save BufferedImage to JPG file with quality

package com.example;

​

import java.awt.image.BufferedImage;

import java.io.IOException;

​

public class Program {

​

    public static void main(String[] args) throws IOException {

​

        BufferedImage image = ...;

        JpegUtils.writeImage(image, "image.jpg", 0.75f);  // quality from 0.0f to 1.0f (from 0% to 100%)

    }

}

package com.example;

​

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.util.Iterator;

import java.util.NoSuchElementException;

​

import javax.imageio.IIOImage;

import javax.imageio.ImageWriteParam;

import javax.imageio.ImageWriter;

import javax.imageio.plugins.jpeg.JPEGImageWriteParam;

import javax.imageio.spi.IIORegistry;

import javax.imageio.spi.ImageWriterSpi;

import javax.imageio.spi.ServiceRegistry.Filter;

import javax.imageio.stream.FileImageOutputStream;

import javax.imageio.stream.ImageOutputStream;

​

public class JpegUtils {

    private static final ImageWriterSpi SPI;

​

    static {

        IIORegistry registry = IIORegistry.getDefaultInstance();

        Filter filter = (Object object) -> {

            ImageWriterSpi spi = (ImageWriterSpi) object;

            for (String type : spi.getMIMETypes()) {

                if ("image/jpeg".equals(type)) {

                    return true;

                }

            }

            return false;

        };

        Iterator<ImageWriterSpi> iterator = registry.getServiceProviders(ImageWriterSpi.class, filter, true);

        try {

            SPI = iterator.next();

        } catch (NoSuchElementException ex) {

            throw new RuntimeException("JPEG image writer is not supported.", ex);

        }

    }

​

    private JpegUtils() {

        // Nothing here ...

    }

​

    public static void writeImage(BufferedImage image, String path, float quality) throws IOException {

        File file = new File(path);

        IIOImage container = new IIOImage(image, null, null);

        ImageWriteParam parameter = new JPEGImageWriteParam(null);

        parameter.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);

        parameter.setCompressionQuality(quality);

        try (ImageOutputStream stream = new FileImageOutputStream(file)) {

            ImageWriter writer = SPI.createWriterInstance();

            try {

                writer.setOutput(stream);

                writer.write(null, container, parameter);

            } finally {

                writer.dispose();

            }

        }

    }

}