如何保持图片质量下，将图片压缩至最小

Question

如何修改以下代码，实现图片压缩过程中，尽量是零损耗，并且图片占内存大小压缩至最小？
我在运行以下代码时候，压缩质量输入的越小，压缩的画质越差，所以想问问大家，该如何办？

public class CompressImageUntils {
    public static void compressImage(String srcPath, String destPath, float quality) {
        try {
            // 读取图片
            File input = new File(srcPath);
            BufferedImage image = ImageIO.read(input);

            // 获取JPEG压缩参数
            Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpg");
            if (!writers.hasNext()) throw new IllegalStateException("No writers found");

            ImageWriter writer = writers.next();
            ImageWriteParam param = writer.getDefaultWriteParam();

            // 如果这是JPEG图片，则设置压缩质量
            if (param instanceof JPEGImageWriteParam) {
                JPEGImageWriteParam jpegParam = (JPEGImageWriteParam) param;
                jpegParam.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT);
                jpegParam.setCompressionQuality(quality); // 设置压缩质量，0.0-1.0
            }
            BeanUtils.copyProperties(1,1);

            // 写入压缩后的图片
            File output = new File(destPath);
            try (ImageOutputStream ios = ImageIO.createImageOutputStream(output)) {
                writer.setOutput(ios);
                writer.write(null, new IIOImage(image, null, null), param);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Answer 1

参考软件Image Optimizer的做法，或者调用软件Image Optimizer