Java的图像旋转 指定图像大小 水平翻转图像

Posted 2022-03-12 Benwei666

转载：http://www.diybl.com/course/3_program/java/javajs/200823/98524.html

package com.zeph.j2se.image;

import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;

public class ImageOperate 
	/**
	 * 旋转图片为指定角度
	 * 
	 * @param bufferedimage
	 *            目标图像
	 * @param degree
	 *            旋转角度
	 * @return
	 */
	public static BufferedImage rotateImage(final BufferedImage bufferedimage,
			final int degree) 
		int w = bufferedimage.getWidth();
		int h = bufferedimage.getHeight();
		int type = bufferedimage.getColorModel().getTransparency();
		BufferedImage img;
		Graphics2D graphics2d;
		(graphics2d = (img = new BufferedImage(w, h, type)).createGraphics())
				.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
						RenderingHints.VALUE_INTERPOLATION_BILINEAR);
		graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);
		graphics2d.drawImage(bufferedimage, 0, 0, null);
		graphics2d.dispose();
		return img;
	

	/**
	 * 变更图像为指定大小
	 * 
	 * @param bufferedimage
	 *            目标图像
	 * @param w
	 *            宽
	 * @param h
	 *            高
	 * @return
	 */
	public static BufferedImage resizeImage(final BufferedImage bufferedimage,
			final int w, final int h) 
		int type = bufferedimage.getColorModel().getTransparency();
		BufferedImage img;
		Graphics2D graphics2d;
		(graphics2d = (img = new BufferedImage(w, h, type)).createGraphics())
				.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
						RenderingHints.VALUE_INTERPOLATION_BILINEAR);
		graphics2d.drawImage(bufferedimage, 0, 0, w, h, 0, 0,
				bufferedimage.getWidth(), bufferedimage.getHeight(), null);
		graphics2d.dispose();
		return img;
	

	/**
	 * 水平翻转图像
	 * 
	 * @param bufferedimage
	 *            目标图像
	 * @return
	 */
	public static BufferedImage flipImage(final BufferedImage bufferedimage) 
		int w = bufferedimage.getWidth();
		int h = bufferedimage.getHeight();
		BufferedImage img;
		Graphics2D graphics2d;
		(graphics2d = (img = new BufferedImage(w, h, bufferedimage
				.getColorModel().getTransparency())).createGraphics())
				.drawImage(bufferedimage, 0, 0, w, h, w, 0, 0, h, null);
		graphics2d.dispose();
		return img;