旋转图像- Java

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;

public class ImageRotator {
    public static void main(String[] args) {
        try {
            // 读取图像文件
            File inputFile = new File("input.jpg");
            BufferedImage image = ImageIO.read(inputFile);

            // 创建变换对象
            AffineTransform transform = new AffineTransform();
            transform.rotate(Math.toRadians(45), image.getWidth() / 2, image.getHeight() / 2);

            // 创建新的BufferedImage对象
            BufferedImage rotatedImage = new BufferedImage(image.getWidth(), image.getHeight(), image.getType());
            Graphics2D g2d = rotatedImage.createGraphics();
            g2d.setTransform(transform);
            g2d.drawImage(image, 0, 0, null);
            g2d.dispose();

            // 保存旋转后的图像
            File outputFile = new File("output.jpg");
            ImageIO.write(rotatedImage, "jpg", outputFile);

            System.out.println("图像旋转完成并保存为 output.jpg");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

int width = (int) Math.round(image.getWidth() * Math.abs(Math.sin(Math.toRadians(angle))) + image.getHeight() * Math.abs(Math.cos(Math.toRadians(angle))));
int height = (int) Math.round(image.getHeight() * Math.abs(Math.sin(Math.toRadians(angle))) + image.getWidth() * Math.abs(Math.cos(Math.toRadians(angle))));
BufferedImage rotatedImage = new BufferedImage(width, height, image.getType());

// 使用Java的ForkJoinPool进行并行处理
ForkJoinPool pool = new ForkJoinPool();
pool.submit(() -> {
    // 旋转操作
}).get();