JAVA实现自动打开URL对应的网页并保存为图片-不借助第三方API

package com.gloomyfish.image.util;
 
import java.awt.AWTException;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.URI;
 
import javax.imageio.ImageIO;
 
public class DeskTopTest {
  public static void main(String[] args) {
    if (!java.awt.Desktop.isDesktopSupported()) {
      System.err.println("Desktop is not supported (fatal)");
      System.exit(1);
    }
 
    java.awt.Desktop desktop = java.awt.Desktop.getDesktop();
    if (!desktop.isSupported(java.awt.Desktop.Action.BROWSE)) {
      System.err.println("Desktop doesn't support the browse action (fatal)");
      System.exit(1);
    }
    
    try {
      URI uri = URI.create("http://www.csdn.net");
      desktop.browse(uri);
      Thread.sleep(8000); // 8 seconds is enough to load the any page.
      Robot robot = new Robot();
      // Rectangle rectangle = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize() );
      Rectangle rectangle = new Rectangle(300, 90, 1000, 720);
      BufferedImage image = robot.createScreenCapture(rectangle);
      File outputfile = new File("D:\\agriculture\\test.jpg");
      ImageIO.write(image, "jpg", outputfile);
    } catch (IOException e) {
      e.printStackTrace();
    } catch (AWTException e) {
      e.printStackTrace();
    } catch (InterruptedException e) {
      e.printStackTrace();
    } 
  }
}