利用Java代码实现图片切割

将一张大图分割成指定数量的小图

  private static void splitImage() throws IOException {

        //String originalImg = "C:\\img\\split\\a380_1280x1024.jpg";
        String originalImg = "F:\\images\\school\\-11ff2b32525fd5f2.jpg";
        // 读入大图
        File file = new File(originalImg);
        FileInputStream fis = new FileInputStream(file);
        BufferedImage image = ImageIO.read(fis);

        // 分割成4*4(16)个小图
        int rows = 4;
        int cols = 4;
        int chunks = rows * cols;

        // 计算每个小图的宽度和高度
        int chunkWidth = image.getWidth() / cols;
        int chunkHeight = image.getHeight() / rows;

        int count = 0;
        BufferedImage imgs[] = new BufferedImage[chunks];
        for (int x = 0; x < rows; x++) {
            for (int y = 0; y < cols; y++) {
                //设置小图的大小和类型
                imgs[count] = new BufferedImage(chunkWidth, chunkHeight, image.getType());

                //写入图像内容
                Graphics2D gr = imgs[count++].createGraphics();
                gr.drawImage(image, 0, 0,
                        chunkWidth, chunkHeight,
                        chunkWidth * y, chunkHeight * x,
                        chunkWidth * y + chunkWidth,
                        chunkHeight * x + chunkHeight, null);
                gr.dispose();
            }
        }

        // 输出小图
        for (int i = 0; i < imgs.length; i++) {
            //ImageIO.write(imgs[i], "jpg", new File("C:\\img\\split\\img" + i + ".jpg"));
            ImageIO.write(imgs[i], "jpg", new File("E:\\temp" + i + ".jpg"));
        }

        System.out.println("完成分割！");
    }