技术教程 编程教程 java实现图片水平和垂直翻转效果 正文

java实现图片水平和垂直翻转效果

2023-05-21,,

最近在做小型游戏，遇到了要翻转图片的苦恼，经过我一下午的研究，终于发现了一种好用的方法。

部分代码来源于别人，我在这个基础上修改了下，变得更好用了，之前的别人Image输入都是BufferedImage，我改成了Image，也就是加了一个转换。

大家如果看不懂代码没关系，会用就行了，我会展示一下怎么用的。

ImageRotate类

package mypackage;
 
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
 
/**
 * Author Mythos_Q
 *
 * Time 2011-07-20
 *
 * Description 图片旋转、翻转处理
 */
public class ImgRotate 
{
 static int Up_Down_Reverse = 0;
 static int Left_Right_Reverse = 1;
  /**
  * 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(h, w, type)).createGraphics()).setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
  graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2 + (w>h?(w-h)/2:(h-w)/2));
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
  return img;
 }
 
 /**
  * 旋转图片为指定角度
  *
  * @param file
  *   目标图像
  * @param degree
  *   旋转角度(90,180,270)
  * @return
  */
 public static File rotateImage(File file,int degree) throws Exception{
  if(degree==90) return rotateImage90(file);
  if(degree==180) return rotateImage180(file);
  if(degree==270) return rotateImage270(file);
  return null;
 }
 public static Image rotateImage(Image Image,int degree) 
 {
  if(degree==90) 
   return rotateImage90(Image);
  if(degree==180)
   return rotateImage180(Image);
  if(degree==270)
   return rotateImage270(Image);
  return null;
 }
 
 private static Image rotateImage90(Image image) 
 {
  BufferedImage bufferedimage = ImageToBufferedImage(image);
  int w = bufferedimage.getWidth();
  int h = bufferedimage.getHeight();
  int type = bufferedimage.getColorModel().getTransparency();
  BufferedImage img;
  Graphics2D graphics2d;
  (graphics2d = 
   (img = new BufferedImage(h, w, type) ).createGraphics()
  ).setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
  graphics2d.rotate(Math.toRadians(270), w / 2, h / 2 + (w-h)/2);
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
  
  return BufferedImageToImage(img);
 
 }
 
 //左转90度
 public static File rotateImage90(File file) throws Exception
 {
  BufferedImage bufferedimage = ImageIO.read(file);
  int w = bufferedimage.getWidth();
  int h = bufferedimage.getHeight();
  int type = bufferedimage.getColorModel().getTransparency();
  BufferedImage img;
  Graphics2D graphics2d;
  (graphics2d = 
   (img = new BufferedImage(h, w, type) ).createGraphics()
  ).setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
  graphics2d.rotate(Math.toRadians(270), w / 2, h / 2 + (w-h)/2);
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
  ImageIO.write(img,"jpg",file);
  return file;
 }
 
 //右转90度
 public static File rotateImage270(File file) throws Exception
 {
  BufferedImage bufferedimage = ImageIO.read(file);
  int w = bufferedimage.getWidth();
  int h = bufferedimage.getHeight();
  int type = bufferedimage.getColorModel().getTransparency();
  BufferedImage img;
  Graphics2D graphics2d;
  (graphics2d = (img = new BufferedImage(h, w, type)).createGraphics()).setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
  graphics2d.rotate(Math.toRadians(90), w / 2 - (w-h)/2, h / 2 );
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
  ImageIO.write(img,"jpg",file);
  return file;
 }
 
 public static Image rotateImage270(Image image)
 {
  BufferedImage bufferedimage = ImageToBufferedImage(image);
  int w = bufferedimage.getWidth();
  int h = bufferedimage.getHeight();
  int type = bufferedimage.getColorModel().getTransparency();
  BufferedImage img;
  Graphics2D graphics2d;
  (graphics2d = (img = new BufferedImage(h, w, type)).createGraphics()).setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
  graphics2d.rotate(Math.toRadians(90), w / 2 - (w-h)/2, h / 2 );
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
  
  return BufferedImageToImage(img);
 }
 //对转
 public static File rotateImage180(File file) throws Exception
 {
  BufferedImage bufferedimage = ImageIO.read(file);
  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(180), w / 2, h / 2 );
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
  ImageIO.write(img,"jpg",file);
  return file;
 }
 public static Image rotateImage180(Image image)
 {
  BufferedImage bufferedimage = ImageToBufferedImage(image);
  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(180), w / 2, h / 2 );
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
 
  return BufferedImageToImage(img);
 }
 /***
  * 图片镜像处理
  * @param file
  * @param FX 0 为上下反转 1 为左右反转
  * @return
  */
 public static void imageMisro(File file,int FX)
 {
  try 
  {
   BufferedImage bufferedimage = ImageIO.read(file);
   int w = bufferedimage.getWidth();
   int h = bufferedimage.getHeight();
   
   int[][] datas = new int[w][h];
   for (int i = 0; i < h; i++) {
    for (int j = 0; j < w; j++) {
     datas[j][i] = bufferedimage.getRGB(j, i);
    }
   }
   int[][] tmps = new int[w][h];
   if (FX == 0) {
    for (int i = 0, a = h - 1; i < h; i++, a--) {
     for (int j = 0; j < w; j++) {
      tmps[j][a] = datas[j][i];
     }
    }
   } else if (FX == 1) {
    for (int i = 0; i < h; i++) {
     for (int j = 0, b = w - 1; j < w; j++, b--) {
      tmps[b][i] = datas[j][i];
     }
    }
   }
   for (int i = 0; i < h; i++){
    for (int j = 0; j<w ;j++){
     bufferedimage.setRGB(j, i, tmps[j][i]);
    }
   }
   
   ImageIO.write(bufferedimage, "jpg", file);
   
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 
 /*
  * 
  * 镜像处理，输入image和方式，返回翻转的新image
  * type = 0 表示上下翻转，type = 1 表示左右翻转
  */
 public static Image imageMisro(Image image,int type )
 {
  try 
  {
    //用到了自己写的方法
   BufferedImage bufferedimage = ImageToBufferedImage(image); 
    
   int w = bufferedimage.getWidth();
   int h = bufferedimage.getHeight();
   
   int[][] datas = new int[w][h];
   for (int i = 0; i < h; i++) {
    for (int j = 0; j < w; j++) {
     datas[j][i] = bufferedimage.getRGB(j, i);
    }
   }
   int[][] tmps = new int[w][h];
   if (type == 0) {
    for (int i = 0, a = h - 1; i < h; i++, a--) {
     for (int j = 0; j < w; j++) {
      tmps[j][a] = datas[j][i];
     }
    }
   } else if (type == 1) {
    for (int i = 0; i < h; i++) {
     for (int j = 0, b = w - 1; j < w; j++, b--) {
      tmps[b][i] = datas[j][i];
     }
    }
   }
   for (int i = 0; i < h; i++){
    for (int j = 0; j<w ;j++){
     bufferedimage.setRGB(j, i, tmps[j][i]);
    }
   }
   
   
   Image newImage = (Image)bufferedimage;
   return newImage;
   //ImageIO.write(bufferedimage, "jpg", file);
   
  } catch (Exception e) {
   e.printStackTrace();
  }
 return null;
 }
 
 //Image转换成BufferedImage
 public static BufferedImage ImageToBufferedImage( Image image )
 {
  BufferedImage bufferedimage = new BufferedImage
  (image.getWidth(null), image.getHeight(null),BufferedImage.TYPE_INT_RGB); 
  Graphics g = bufferedimage.createGraphics(); 
  g.drawImage(image, 0, 0, null); //这里，大家可能会有疑问，似乎没有对bufferedimage干啥
  g.dispose();  //但是是正确的，g调用drawImage就自动保存了
  return bufferedimage;
 }
 //BufferedImage 转换成Image类型
 public static Image BufferedImageToImage( BufferedImage b )
 {
  return (Image)b;
 }
}

下面展示用法： 

package mypackage;
 
import java.awt.*;
import java.awt.image.*;
import java.net.URL;
 
import javax.swing.*;
 
public class Test extends JPanel
{
 JFrame frame;
 Image image = new ImageIcon("hand2.jpg").getImage();
 public void paint( Graphics g )
 {
 
 g.drawImage(image, 0, 0,null); //之前的图片
 Image m = ImgRotate.imageMisro(image, ImgRotate.Left_Right_Reverse);
 g.drawImage(m, 200, 200, null); //水平翻转的图片
 
 Image mm = ImgRotate.rotateImage(m, 90); //这里只能填90,180,270
 g.drawImage(mm, 250, 0, null);
 
 
 }
 public Test()
 {
 frame = new JFrame();
 
 frame.add(this);
 
 frame.setSize(500,500);
 frame.setLocationRelativeTo(null);
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setVisible(true);
 }
 public static void main(String[] args) 
 {
 
 new Test();
 
 }
 
 
}

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