如何使用包装为Windows Service的Java程序捕获屏幕截图

Question

I have a java program to capture screenshot on Windows. Here is part of the code. It is generating a black image when wrapped by YAJSW and run as a windows service.

BufferedImage image = new Robot().createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));
        ImageIO.write(image, "png", file.toFile());

I know this is due to some limitation of windows service. But is there any way to make it work?

Answer 1

I found another post on the same topic How to take a screenshot in Java?

Try the following code from the second answer : If this doesnt work, it would exclude the possibility, that one hidden part of your code is responsible for the bug.

 import java.awt.Rectangle; import java.awt.Robot; import java.awt.Toolkit; import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.*; public class screen2image { SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd hh mm ss a"); public void robo() throws Exception { Calendar now = Calendar.getInstance(); Robot robot = new Robot(); BufferedImage screenShot = robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize())); ImageIO.write(screenShot, "JPG", new File("d:\\\\"+formatter.format(now.getTime())+".jpg")); System.out.println(formatter.format(now.getTime())); } public static void main(String[] args) throws Exception { screen2image s2i = new screen2image(); while(1==1) { s2i.robo(); Thread.sleep(10000); } } } 

Hope it helps you ! If this doesnt work, you should probably check your Windows/Java installation...