基本原理:
JDK6u10版本以上提供了DeskTop的API接口支持,可以根据URI参数自动打开
操作系统默认的浏览器来加载对应的网页,同时借助JDK的Robot类实现自动截屏
这样就完成了对任意一个URL对应网页保存为图片。程序如下:
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(); } } }缺点:
程序运行时用户不能有其它操作,否则可能保存错误截屏。 这里
假设加载一个网页时间最长为8秒.
转载请注明出自gloomyfish