如何把Image对象保存成jpg图像格式?

Question

Image theImg = ...;BufferedImage bufImg = new BufferedImage(theImg.getWidth(null), theImg.getHeight(null), BufferedImage.TYPE_INT_RGB);img.getGraphics().drawImage(theImg, 0, 0, null);FileOutputStream fos = new FileOutputStream("test1.jpg");
com.sun.image.codec.jpeg.JPEGImageEncoder encoder = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder(fos);
encoder.encode(bufImg);
fos.close();

Answer 1

这句
img.getGraphics().drawImage(theImg, 0, 0, null); 
应该是：
bufImg.getGraphics().drawImage(theImg, 0, 0, null);

Answer 2

来晚了。
cbhyk 兄厉害

Answer 3

import java.io.*;
import java.awt.image.*;
import java.awt.*;
import javax.imageio.*;
import javax.swing.*;class A{
    public static void main(String[] args)
        throws Exception{        Image img=new ImageIcon("nh.gif").getImage();
    
        int width = img.getWidth(null);
        int height = img.getHeight(null);
        BufferedImage bi = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
        Graphics g = bi.getGraphics();
        g.drawImage(img,0,0,width,height,null);
        g.dispose();
        File f = new File("myimage.jpg");
        ImageIO.write(bi, "jpg", f);
    }
}