介绍几个java把网页报存为图片的框架

首先说一下。java在图像这一块非常弱。用java实现java截图倒不难，原理吗就是把当前屏幕存成一个图，然后获取鼠标拉去的想去位置然后把截取的图保存到panel里边，再生成图片即可：示例代码就不展示了，网上很多。下边说几个将网页保存为图片的框架：

①html2image

网上炒这个还不少呢。我说这个就是原声的java代码进行封装的一个jar包。效果非常差，代码就不贴了网上好多。

②cobra

如果你不知道这个的话，你应该听说过lobobrowser，纯java实现的浏览器，测试了下，除了启动慢的要死其他还可以。

这个代码截取还是不错的，不说了直接上代码：

package htmlToImage;

import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import org.lobobrowser.html.gui.HtmlPanel;
import org.lobobrowser.html.test.SimpleHtmlRendererContext;
import org.lobobrowser.html.test.SimpleUserAgentContext;

public class CobraTest {
	public static void main(String[] args) throws Exception {
		JFrame window = new JFrame();
		HtmlPanel panel = new HtmlPanel();
		window.getContentPane().add(panel);
		window.setSize(600, 400);
		window.setVisible(true);
		new SimpleHtmlRendererContext(panel, new SimpleUserAgentContext())
				.navigate("http://jobs.zhaopin.com/377931819252715.htm?ssidkey=y&ss=201&ff=03");
		System.out.println("10");
		Thread.sleep(10000);
		BufferedImage image = new BufferedImage(panel.getWidth(),
				panel.getHeight(), BufferedImage.TYPE_INT_ARGB);

		// paint the editor onto the image
		SwingUtilities.paintComponent(image.createGraphics(), panel,
				new JPanel(), 0, 0, image.getWidth(), image.getHeight());
		// save the image to file
		ImageIO.write((RenderedImage) image, "png", new File("html.png"));
		System.out.println("www");
	}
}

但是这个框架应该有个限制，css3应该支持不了。

③cssbox

这个非常不错。如果网站不做故意限制的话，截图非常完美。。。

package htmlToImage;

import java.io.File;
import java.io.FileOutputStream;

import org.fit.cssbox.demo.ImageRenderer;

public class CssBox {
	public static void main(String[] args) throws Exception {
		ImageRenderer render = new ImageRenderer();
		System.out.println("kaishi");
		String url = "http://worldwide.espacenet.com/publicationDetails/originalDocument?CC=AU&NR=2014200109A1&KC=A1&FT=D&ND=3&date=20140821&DB=EPODOC&locale=en_EP";
		FileOutputStream out = new FileOutputStream(new File("D:"+File.separator+"html.png"));
		render.renderURL(url, out, ImageRenderer.TYPE_PNG);
		System.out.println("OK");
	}
}

④java原生代码

package htmlToImage;

import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.swing.JEditorPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

/**
 * 原理就是在现在的awt或者swing上显示网页然后将内容保存为一个图片
 * 没办法控制延迟啊。
 * @author zlqiao
 *
 */
public class JavaCoreApi {
	public static void main(String[] args) throws Exception {
		//load the webpage into the editor
		//JEditorPane ed = new JEditorPane(new URL("http://www.google.com"));
		JEditorPane ed = new JEditorPane(new URL("http://www.baidu.com"));
		System.out.println("10");
		Thread.sleep(10000);
		ed.setSize(1000,1000);

		//create a new image
		BufferedImage image = new BufferedImage(ed.getWidth(), ed.getHeight(),
		                                        BufferedImage.TYPE_INT_ARGB);

		//paint the editor onto the image
		SwingUtilities.paintComponent(image.createGraphics(),
		                              ed,
		                              new JPanel(),
		                              0, 0, image.getWidth(), image.getHeight());
		//save the image to file
		ImageIO.write((RenderedImage)image, "png", new File("html.png"));
			System.out.println("ok");

	}
}