HtmlCleanner结合xpath用法-优快云博客

本文通过Java实现了一个网页解析示例，使用HtmlCleaner库从新浪财经网站抓取新闻标题及内容。示例代码展示了如何按标签名获取元素、使用XPath选择特定节点，并获取链接地址。

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        HtmlCleaner cleaner = new HtmlCleaner();   

        TagNode node = cleaner.clean(new URL("http://finance.sina.com.cn/money/nmetal/20091209/10157077895.shtml"));   
        //按tag取.   
        Object[] ns = node.getElementsByName("title", true);    //标题   

        if(ns.length > 0) {   
            System.out.println("title="+((TagNode)ns[0]).getText());   
        }   
        // /html/body/div[2]/div[4]/div/div/div/div[2]/p
        ns = node.evaluateXPath("//div[@class=\"blkContainerSblkCon\"]/p"); //选取class为指定blkContainerSblkCon的div下面的所有p标签
        for (int i = 0; i < ns.length; i++) {
        	 String in = cleaner.getInnerHtml((TagNode)ns[i]);
             System.out.println("<p>"+in + "</p>");
		}
        String in = cleaner.getInnerHtml((TagNode)ns[0]);
        System.out.println(in);

        System.out.println(((TagNode)ns[0]).getText());


        HtmlCleaner cleaner = new HtmlCleaner();   
        String url = "http://finance.sina.com.cn/nmetal/hjfx.html";
        URL _url = new URL(url);
        TagNode node = cleaner.clean(_url);   

        //按tag取.   
        Object[] ns = node.getElementsByName("title", true);    //标题   

        if(ns.length > 0) { 
            System.out.println("title="+((TagNode)ns[0]).getText());   
        }  


        ns = node.evaluateXPath("//*[@class='Frame-Row3-01-C']/table[2]/tbody/tr/td/a"); //选取class为指定blkContainerSblkCon的div下面的所有p
        for (int i = 0; i < ns.length; i++) {

        	//取链接文本
//        	 String in = cleaner.getInnerHtml((TagNode)ns[i]);
//           System.out.println(in);

        	//获取链接的
        	TagNode n = (TagNode) ns[i];
//        	System.out.println(n.getAttributeByName("href"));
        	System.out.println(new URL(_url,n.getAttributeByName("href")).toString());
		}
//        String in = cleaner.getInnerHtml((TagNode)ns[0]);
//        System.out.println(in);

//        System.out.println(((TagNode)ns[0]).getText());

//        System.out.println("ul/li:");   
//        //按xpath取   
//        ns = node.evaluateXPath("//div[@class='d_1']//li");   
//        for(Object on : ns) {   
//            TagNode n = (TagNode) on;   
//            System.out.println("\ttext="+n.getText());   
//        }   
//        System.out.println("a:");   
//        //按属性值取   
//        ns = node.getElementsByAttValue("name", "my_href", true, true);   
//        for(Object on : ns) {   
//            TagNode n = (TagNode) on;   
//            System.out.println("\thref="+n.getAttributeByName("href")+", text="+n.getText());   
//        }