深圳移动网站建设制作公司,网站建设的认识,wap页面是什么意思,北京建设网官网下载重新调整尺寸
/*** * 功能描述: br* 〈调整图像到固定大小〉** param srcImageFile 源图像文件地址* param descImageFile 缩放后的图像地址* param width 缩放后的宽度* param height 缩放后的高度* param isPadding 是否补白* */
public final …重新调整尺寸
/*** * 功能描述: br* 〈调整图像到固定大小〉** param srcImageFile 源图像文件地址* param descImageFile 缩放后的图像地址* param width 缩放后的宽度* param height 缩放后的高度* param isPadding 是否补白* */
public final static void changeSize(String srcImageFile, String descImageFile, int width, int height, boolean isPadding) {try {// 缩放比例double ratio 0.0;File file new File(srcImageFile);BufferedImage bufferedImage ImageIO.read(file);Image image bufferedImage.getScaledInstance(width, height, bufferedImage.SCALE_SMOOTH);// 计算缩放比例if (bufferedImage.getHeight() bufferedImage.getWidth()) {ratio (new Integer(height)).doubleValue() / bufferedImage.getHeight();} else {ratio (new Integer(width)).doubleValue() / bufferedImage.getWidth();}AffineTransformOp op new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null);image op.filter(bufferedImage, null);// 是否需要补白if (isPadding) {BufferedImage tempBufferedImage new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics2D graphics2d tempBufferedImage.createGraphics();graphics2d.setColor(Color.white);graphics2d.fillRect(0, 0, width, height);if (width image.getWidth(null)) {graphics2d.drawImage(image, 0, (height - image.getHeight(null)) / 2, image.getWidth(null), image.getHeight(null), Color.white, null);} else {graphics2d.drawImage(image, (width - image.getWidth(null)) / 2, 0, image.getWidth(null), image.getHeight(null), Color.white, null);}graphics2d.dispose();image tempBufferedImage;}ImageIO.write((BufferedImage) image, png, new File(descImageFile));} catch (IOException e) {e.printStackTrace();}
}
合并两张PNG图片
/*** * 功能描述: br* 〈利用画布生成新的图片〉** param backImage 背景图文件地址* param srcImage 前景图文件地址* param descImage 生成图文件地址* return* */
public static void mergeImage(String backImage, String srcImage, String descImage) {try {int offset 0;BufferedImage backBufferedImage ImageIO.read(new File(backImage));BufferedImage srcBufferedImage ImageIO.read(new File(srcImage));// 输出图片宽度int width backBufferedImage.getWidth() offset;// 输出图片高度int height backBufferedImage.getWidth() offset;BufferedImage descBufferedImage new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR);Graphics2D graphics2d (Graphics2D) descBufferedImage.getGraphics();graphics2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);// 往画布上添加图片,并设置边距graphics2d.drawImage(backBufferedImage, null, 0, 0);graphics2d.drawImage(srcBufferedImage, null, 175, 175);graphics2d.dispose();// 输出新图片ImageIO.write(descBufferedImage, png, new File(descImage));} catch (Exception e) {e.printStackTrace();}
}
测试
public static void main(String[] args) throws IOException {// 重新调整b.png尺寸 生成d.pngchangeSize(d:\\b.png, d:\\d.png, 640, 640, false);// 合并a.pngd.png-c.pngmergeImage(d:\\a.png, d:\\d.png, d:\\c.png);
}
