Java实现电脑屏幕的截取并保存成图片

柔情只为你懂 2022-06-06 01:43 259阅读 0赞

其实截图的知识也不难  
额(⊙o⊙)…  
下面那个代码写辣么辣么长是俺的错  
（时隔一年我回来看一眼，忍不住道当年哪个傻B写的傻B玩意儿……心酸心累心惆怅）  
为了表达歉意  
我特定重新写了一个放在**最最最后面**  
截图主要用到ImageIO【保存成文件】、BufferedImage【临时存储】、Robot【截取】等知识  
具体怎么操作我在最最最最后面那个代码里面有注解  
实例代码：

import java.awt.*;
    import java.io.File;
    import java.io.IOException;
    import java.util.Date;
    import java.text.SimpleDateFormat;
    import java.awt.image.BufferedImage;
    import javax.imageio.ImageIO;
    
    public class ScreenCapture { 
        private String saveDir;     //存放图片的路径
        private String name;        //包括后缀的图片全称
        private String imageFormat; //图片存储格式，即后缀
        private String imageName;   //图片的名字，不包括后缀
        private Dimension screen;   //屏幕
        private Rectangle screenRectangle;      //矩形框
    
        public ScreenCapture() {
            saveDir = "D:\\image";
            screen = Toolkit.getDefaultToolkit().getScreenSize();
            screenRectangle = new Rectangle(screen);
            imageFormat = "png";
        }
    
        public void captureScreen() {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
            imageName = sdf.format(new Date());     //默认名字
            name = imageName + "." + imageFormat;
    
            File imageDir = new File(saveDir);
            if (!imageDir.exists()) {   //如果路径不存在，则创建
                imageDir.mkdirs();
            }
    
            //截屏
            BufferedImage image = null;
            try {
                Robot robot = new Robot();  //记得抛异常
                image = robot.createScreenCapture(screenRectangle);
            } catch (AWTException e) {
                e.printStackTrace();
            }
            try {
                ImageIO.write(image, imageFormat, new File(imageDir, name));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
        public void captureScreen(String imageName) {
            this.imageName = imageName;
            name = imageName + "." + imageFormat;
    
            File imageDir = new File(saveDir);
            if (!imageDir.exists()) {   //如果路径不存在，则创建
                imageDir.mkdirs();
            }
    
            //截屏
            BufferedImage image = null;
            try {
                Robot robot = new Robot();  //记得抛异常
                image = robot.createScreenCapture(screenRectangle);     //获取指定的图片
            } catch (AWTException e) {
                e.printStackTrace();
            }
            try {
                ImageIO.write(image, imageFormat, new File(imageDir, name));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
        public String getSaveDir() {
            return saveDir;
        }
    
        public void setSaveDir(String saveDir) {
            this.saveDir = saveDir;
        }
    
        public String getImageFormat() {
            return imageFormat;
        }
    
        public void setImageFormat(String imageFormat) {
            this.imageFormat = imageFormat;
        }
    
        public String getImageName() {
            return imageName;
        }
    
        //测试
        public static void main(String[] args) {
            ScreenCapture screen =  new ScreenCapture();
            screen.captureScreen();
            screen.setSaveDir("D:\\image");
            screen.setImageFormat("jpg");
            screen.captureScreen("我是白痴");
        }
    }

\++++++++++++++++++++++++++++++++++++++++++++++++++++  
这里是2018.03.16时候推出的爱心代码  
方便初学者参考\[帅\]

import java.awt.*;
    import java.awt.image.*;
    import java.io.*;
    import javax.imageio.*;
    
    public class Main { 
        public static void main(String[] args) throws AWTException, IOException {
            Dimension screen = null;    //电脑屏幕大小
            Rectangle screenRect = null;//截图的宽高
            String imageName = "我是白痴";  //图片的名称
            String imageFormat = "png"; //图片的格式，即后缀
            String saveDir = "C:/";     //图片存放的路径
            BufferedImage image = null; //暂存图片的缓存
            Robot robot = null;         //负责截屏的操作者
    
            screen = Toolkit.getDefaultToolkit().getScreenSize();
            screenRect = new Rectangle(screen);
            robot = new Robot();        //抛出AWTException
            image = robot.createScreenCapture(screenRect);      //将得到的屏幕信息存放在缓存里面
            //将缓存里面的屏幕信息以图片的格式存在制定的磁盘位置
            ImageIO.write(image, imageFormat, new File(saveDir, imageName + "." + imageFormat));    //抛出IOException
        }
    }