自动调整图像大小

Question

有没有办法调整上传到服务器的图片大小？我使用servlet和JSP上传了一个图像。现在我想按照固定的比例调整图像大小。

是否有可用的API？

Answer 1

Image newimg = img.getScaledInstance(scale, scale,
            java.awt.Image.SCALE_SMOOTH);

Answer 2

查看这些链接

Are there any java library for thumbnails generation?
Java image resize, maintain aspect ratio
How to resize an image in Java ?

Answer 3

引自http://www.mkyong.com/java/how-to-resize-an-image-in-java/

Graphics2D is providing the image re-size feature as follows :

   BufferedImage resizedImage = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, type);
   Graphics2D g = resizedImage.createGraphics();
   g.drawImage(originalImage, 0, 0, IMG_WIDTH, IMG_HEIGHT, null);
   g.dispose();

这对我有帮助。我想它会帮助你。