Image resizing Java

问题:

I have a weird problem with resizing images and can't figure out what I'am doing wrong. I've read lots of posts wwhich basically have the same code as I:

(I use the java library Scalr)

File image = new File("myimage.png");
File smallImage = new File("myimage_s");
try {
    BufferedImage bufimage = ImageIO.read(image);

    BufferedImage bISmallImage = Scalr.resize(bufimage, 30); // after this line my dimensions in bISmallImage are correct!
    ImageIO.write(bISmallImage, "png", smallImage); // but my smallImage has the same dimension as the original foto
} catch (Exception e) {}

Can someone tell me what I am doing wrong?

回答1:

I do not see anything wrong with your code.

I pulled it into a quick test project in Eclipse targeting Java SE 7 and using imgscalr 4.2 on Windows 7 Pro 64-bit:

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

import javax.imageio.ImageIO;

import org.imgscalr.Scalr;

public class ScalrTest {

    public static void main(String[] args) {
        File image = new File("myimage.png");
        File smallImage = new File("myimage_s.png"); // FORNOW: added the file extension just to check the result a bit more easily
        // FORNOW: added print statements just to be doubly sure where we're reading from and writing to
        System.out.println(image.getAbsolutePath());
        System.out.println(smallImage.getAbsolutePath());
        try {
            BufferedImage bufimage = ImageIO.read(image);

            BufferedImage bISmallImage = Scalr.resize(bufimage, 30); // after this line my dimensions in bISmallImage are correct!
            ImageIO.write(bISmallImage, "png", smallImage); // but my smallImage has the same dimension as the original foto
        } catch (Exception e) {
            System.out.println(e.getMessage()); // FORNOW: added just to be sure
        }
    }

}

With the following myimage.png...

..., it produced the following myimage_s.png:

Maybe there is an environmental issue that's hamstringing your code, but possibilities that come to mind would come with a clear error.