package com.zeph.j2se.image;
 
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
 
public class ImageOperate {
 /**
 * 旋轉圖片為指定角度
 * 
 * @param bufferedimage
 *   目標圖像
 * @param degree
 *   旋轉角度
 * @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;
 }
 
 /**
 * 變更圖像為指定大小
 * 
 * @param bufferedimage
 *   目標圖像
 * @param w
 *   寬
 * @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;
 }
 
 /**
 * 水平翻轉圖像
 * 
 * @param bufferedimage
 *   目標圖像
 * @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;
 }
}