/**
 * 圖片基本操作
 * @author
 */
public class image_operation_format {

        /**
         * 縮小并轉(zhuǎn)換格式
         *
         * @param srcPath
         * @param destPath
         * @param height
         * @param width
         * @param formate
         * @return
         */
        public boolean imageformat(String srcPath, String destPath, int height, int width, String formate) {
            boolean flag = false;
            try {
                File file = new File(srcPath);
                File destFile = new File(destPath);
                //校驗文件是否存在
                if (!destFile.getParentFile().exists()) {
                    destFile.getParentFile().mkdir();
                }
                // 讀入文件
                BufferedImage src = ImageIO.read(file);
                Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT);
                BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                Graphics g = bufferedImage.getGraphics();
                // 繪制縮小后的圖
                g.drawImage(image, 0, 0, null);
                g.dispose();
                // 輸出到文件流
                flag = ImageIO.write(bufferedImage, formate, new FileOutputStream(destFile));
            } catch (IOException e) {
                e.printStackTrace();
            }
            return flag;
        }

        public static void main(String[] args) {
            try {
                image_operation_format iof = new image_operation_format();
                boolean flag = iof.imageformat("E:\\potos\\原文件\\11.jpg", "E:\\potos\\新文件\\11.png", 400, 400, "png");
                System.out.println(flag);
            } catch (Exception e) {
                System.out.println(e);
            }
        }
}