Java判断图片格式

public class ImageUtils {

	public static boolean isImage(File imageFile) {
		if (!imageFile.exists()) {
			return false;
		}
		try {
			Image img = ImageIO.read(imageFile);
			return img != null && img.getWidth(null) > 0 && img.getHeight(null) > 0;
		} catch (Exception e) {
			return false;
		}
	}
}