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();
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持亿速云。
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