图片翻转

1.需求：照片使用前置摄像头拍摄，转正常照片
转换前：

public static void main(String[] args) {
        File inputFile = new File("E:\\lswj\\230203103017950_877418.jpg");
        File outputFile = new File("E:\\lswj\\output.jpg");

        imageHorizontally(inputFile, outputFile);
        imageVertically(inputFile, outputFile);
    }

    /**
     * 前置摄像头照片转成正常照片
     * @param inputFile
     * @param outputFile
     */
    public static void imageHorizontally(File inputFile, File outputFile) {
        try {
            BufferedImage inputImage = ImageIO.read(inputFile);
            int width = inputImage.getWidth();
            int height = inputImage.getHeight();

            BufferedImage outputImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

            for (int y = 0; y < height; y++) {
                for (int x = 0; x < width; x++) {
                    outputImage.setRGB(x, y, inputImage.getRGB(width - x - 1, y));
                }
            }

            ImageIO.write(outputImage, "PNG", outputFile);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 前置摄像头照片转成正常照片然后上下翻转
     * @param inputFile
     * @param outputFile
     */
    public static void imageVertically(File inputFile, File outputFile) {
        try {
            BufferedImage inputImage = ImageIO.read(inputFile);
            int width = inputImage.getWidth();
            int height = inputImage.getHeight();

            BufferedImage outputImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

            for (int y = 0; y < height; y++) {
                for (int x = 0; x < width; x++) {
                    outputImage.setRGB(x, y, inputImage.getRGB(x, height - y - 1));
                }
            }

            ImageIO.write(outputImage, "PNG", outputFile);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

imageVertically方法转换后：

imageHorizontally方法转换后：

我本次需要的是imageHorizontally转换后的效果

上次提供的照片翻转代码经过实际检测，发现一个200K的照片翻转后的大小在4M左右，容量太大，修改为下面的方法

/**
     * 图片镜像翻转
     *
     * @param file 原图片file文件
     * @param target 翻转后图片输出路径
     */
    public static File mirrorImage(File file, String target) {
        BufferedImage image;
        try {
            image = ImageIO.read(file);

            int width = image.getWidth();
            int height = image.getHeight();

            for (int j = 0; j < height; j++) {
                int l = 0, r = width - 1;
                while (l < r) {
                    int pl = image.getRGB(l, j);
                    int pr = image.getRGB(r, j);
                    image.setRGB(l, j, pr);
                    image.setRGB(r, j, pl);
                    l++;
                    r--;
                }
            }
            file = new File(target);
            String fileName = file.getName();
            String fileExtension = fileName.substring(fileName.lastIndexOf(".") + 1);
            ImageIO.write(image, fileExtension, file);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return file;
    }