Java BufferedImage Compress compress(BufferedImage image, float quality)

Description

compress

License

Open Source License

Declaration

public static BufferedImage compress(BufferedImage image, float quality) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.image.BufferedImage;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import java.util.Iterator;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;

public class Main {
    public final static String JPG = "jpeg";

    public static BufferedImage compress(BufferedImage image, float quality) {
        try {//  w w w  .  ja v a2 s .co  m
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            write(image, quality, out);
            return ImageIO.read(new ByteArrayInputStream(out.toByteArray()));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private static void write(BufferedImage image, float quality, ByteArrayOutputStream out) throws IOException {
        Iterator writers = ImageIO.getImageWritersBySuffix(JPG);
        if (!writers.hasNext()) {
            throw new IllegalStateException("No writers found");
        }
        ImageWriter writer = (ImageWriter) writers.next();
        ImageOutputStream ios = ImageIO.createImageOutputStream(out);
        writer.setOutput(ios);
        ImageWriteParam param = writer.getDefaultWriteParam();
        if (quality >= 0) {
            param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
            param.setCompressionQuality(quality);
        }
        writer.write(null, new IIOImage(image, null, null), param);
    }

    public static BufferedImage read(byte[] bytes) {
        try {
            return ImageIO.read(new ByteArrayInputStream(bytes));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}

Related

1. compress(BufferedImage image, String path)
2. compressImage(BufferedImage originalImage, int type, int width, int height)
3. compression(BufferedImage src, int scale)
4. compressPhoto(Image originImg, int newWidth, int newHeight)