jsp截屏

import java.awt.AWTException;
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 javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ScreenshotServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            Robot robot = new Robot();
            Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
            BufferedImage screenFullImage = robot.createScreenCapture(screenRect);
            
            File file = new File("screenshot.png");
            ImageIO.write(screenFullImage, "png", file);
            
            response.setContentType("image/png");
            response.setContentLength((int) file.length());
            java.io.FileInputStream in = new FileInputStream(file);
            java.io.OutputStream out = response.getOutputStream();
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, bytesRead);
            }
            in.close();
            out.flush();
        } catch (AWTException e) {
            e.printStackTrace();
        }
    }
}

<img src="screenshot" alt="Screenshot"/>