Java 使用Graphics2D复制旋转图像

导入相关包：

import java.awt.Graphics2D;
import java.awt.Color;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;

读取图片：

	public static BufferedImage read(File file) {
		try {
			BufferedImage bufferedImage = ImageIO.read(file);
			return bufferedImage;
		} catch (IOException e) {
			logger.error("ERROR", e);
		}
		return null;
	}

旋转图片：

    public BufferedImage rImage(){
        //读取需要旋转的图片
        BufferedImage chars = read(new File("C:\a.png"));
        Color color = new Color(255, 255, 255);
        int degree = 30;
        int width = 65;
        int height = 65;
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

        Graphics2D g = image.createGraphics();
        // 全部刷成设置的color,注释这行代码，则是透明背景
        g.setBackground(color);
        g.fillRect(0, 0, width, height);

        //旋转
        g.rotate(Math.toRadians(degree), width / 2, height / 2);
        //注意，要先旋转画布，然后再将图片画上去
        g.drawImage(chars, 14, 15, null);
        g.dispose();
        return image;
    }