java把网页报存为图片的框架

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" );

    }
}

CSSBox

http://sourceforge.net/projects/cssbox/