Java将本地图片转为二进制流，将二进制流转化为图片

 这个是最简单的图片转化为二进制，再将二进制转化为图片

public static void main(String[] args) {
      //图片转化为二进制
        byte[] imageBytes = null; 
        try (FileInputStream fileInputStream = new FileInputStream(new File("C:/4.jpg"));) {
            imageBytes = new byte[fileInputStream.available()];
            fileInputStream.read(imageBytes);
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println(imageBytes);

     //二进制转化为图片
        try (FileOutputStream fileOutputStream = new FileOutputStream(new File("C:/Users/2.jpg"));) {
            fileOutputStream.write(imageBytes);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }