Java 实现截屏

操作系统：Windows 10 x64

参考：https://blog.csdn.net/weixin_40657079/article/details/83961708

import java.awt.AWTException;
import java.awt.Desktop;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.imageio.ImageIO;

public class Main {

    public static void main(String[] args) throws AWTException, IOException {
        // 获取屏幕的尺寸
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        System.out.println("The width and the height of the screen are " + screenSize.getWidth() + " x " + screenSize.getHeight());
        
        // 截取屏幕
        BufferedImage image = new Robot().createScreenCapture(new Rectangle(screenSize));
        
        // 设置日期格式，作为目录名
        DateFormat dfDirectory = new SimpleDateFormat("yyyyMMdd");
        // 创建一个用于保存图片的文件夹
        File screenCaptureDirectory = new File("J:" + File.separator + "ScreenCapture" + File.separator + dfDirectory.format(new Date()));
        if (!screenCaptureDirectory.exists()) {
            screenCaptureDirectory.mkdirs();
            System.out.println("The directory " + screenCaptureDirectory.getName() + " is created.");
        }
        
        // 设置日期格式，作为图片名
        DateFormat dfImageName = new SimpleDateFormat("yyyyMMddhhmmss");
        // 指定路径，并以特定的日期格式作为图片的名称
        File imageFile = new File(screenCaptureDirectory, (dfImageName.format(new Date()) + ".png"));
        
        // 以指定的图片格式将截取的图片写到指定的文件
        ImageIO.write(image, "png", imageFile);
        
        // 自动打开图片（没看懂！）
        if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.OPEN)) {
            Desktop.getDesktop().open(imageFile);
        }
    }
}

控制台输出的信息：

The width and the height of the screen are 1920.0 x 1080.0
The directory 20190504 is created.

 

新创建的文件夹，以及截取的图片：

截取的图片：