java图片高清压缩（1）

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

 public class NarrowImage {

    /**
     * @param im
     *            原始图像
     * @param resizeTimes
     *            倍数,比如0.5就是缩小一半,0.98等等double类型
     * @return 返回处理后的图像
     */
    public BufferedImage zoomImage(String src) {

        BufferedImage result = null;

        try {
            File srcfile = new File(src);
            if (!srcfile.exists()) {
                System.out.println("文件不存在");

            }
            BufferedImage im = ImageIO.read(srcfile);

            /* 原始图像的宽度和高度 */
            int width = im.getWidth();
            int height = im.getHeight();

            //压缩计算
            float resizeTimes = 0.3f;  /*这个参数是要转化成的倍数,如果是1就是转化成1倍*/

            /* 调整后的图片的宽度和高度 */
            int toWidth = (int) (width * resizeTimes);
            int toHeight = (int) (height * resizeTimes);

            /* 新生成结果图片 */
            result = new BufferedImage(toWidth, toHeight,
                    BufferedImage.TYPE_INT_RGB);

            result.getGraphics().drawImage(
                    im.getScaledInstance(toWidth, toHeight,
                            java.awt.Image.SCALE_SMOOTH), 0, 0, null);


        } catch (Exception e) {
            System.out.println("创建缩略图发生异常" + e.getMessage());
        }

        return result;

    }

     public boolean writeHighQuality(BufferedImage im, String fileFullPath) {
            try {
                /*输出到文件流*/
                FileOutputStream newimage = new FileOutputStream(fileFullPath);
                JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage);
                JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(im);
                /* 压缩质量 */
                jep.setQuality(0.9f, true);
                encoder.encode(im, jep);
               /*近JPEG编码*/
                newimage.close();
                return true;
            } catch (Exception e) {
                return false;
            }
        }


     public static void main(String[] args) {

         String inputFoler = "E:\\11.jpg" ; 
         /*这儿填写你存放要缩小图片的文件夹全地址*/
        String outputFolder = "E:\\12.jpg";  
        /*这儿填写你转化后的图片存放的文件夹*/



         NarrowImage narrowImage = new NarrowImage();
         narrowImage.writeHighQuality(narrowImage.zoomImage(inputFoler), outputFolder);

    }

}

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