imagescaling压缩图片

在不影响视觉效果的前提下，压缩图片大小，节省空间

 

import javax.imageio.ImageIO;

import org.apache.commons.io.FilenameUtils;

import com.mortennobel.imagescaling.DimensionConstrain;
import com.mortennobel.imagescaling.ResampleOp;
/**
     * 原尺寸大小压缩
     * @param srcFile
     * @param destFile
     * @throws IOException
     */
    public double[] scale(File srcFile, File destFile) throws IOException {
        BufferedImage image = null;
        if (srcFile != null && srcFile.isFile() && srcFile.exists()) {
            image = ImageIO.read(srcFile);
        }
        
        ResampleOp resampleOp = new ResampleOp(DimensionConstrain.createMaxDimension((int)getWidth(image), (int)getHeight(image), false));
        BufferedImage tag = resampleOp.filter(image, null);
        String ext = FilenameUtils.getExtension(destFile.getName()).toLowerCase();
        
        if (image != null && ext != null && !"".equals(ext) && destFile != null) {
            ImageIO.write(tag, ext, destFile);
        }
        
        double[] zoomSize = new double[2];
        zoomSize[0] = getWidth(tag);
        zoomSize[1] = getHeight(tag);
        return zoomSize;
        
    }