Java 修改图片尺寸

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    public static void compressImg(String filePath, String ext) throws Exception {
    	int newWidth = 160;
    	int newHeight = 160;
    
    	File imgFile = new File(filePath);
    	BufferedImage image = ImageIO.read(imgFile);
    	int width = image.getWidth();
	int height = image.getHeight();
	if(Math.abs(width-height)==0){
		BufferedImage newImage = new BufferedImage(newWidth, newHeight, image.getType());
		Graphics2D g = newImage.createGraphics();
		g.drawImage(image, 0, 0, newWidth, newHeight, null);
		g.dispose();
		ImageIO.write(newImage, ext, new File(filePath));
	}
    }
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