Java 创建WebServicejava+Jsoup 正则过滤html网页标签【多线程数据采集之二】

java采集数据，获取了 html整个文本之后。 

该考虑的是如何过滤掉html标签， 得到自己所需要的重要数据了。

实现方法有多种办法，第一：用正则，第二：用第三方jar包，其实本质也是封装了正则表达式

今天就以 Jsoup 第三方jar包来讲解。

jsoup详细资料：http://blog.csdn.net/yjflinchong/article/details/7743995

转载注明出处：http://blog.csdn.net/column/details/threadgrab.html

现在贴上一个网页过滤的方法实例

//门票浏览  url参数 http://www.lvmama.com/dest/lantiancheng 	public static DataBean getWebData1(String url){ 		DataBean data = null; 		try { 			Document docdata = Jsoup.connect(url).timeout(20000).get(); 			String id = ".quick-menu .last a"; 			String city = ".proDetail a"; 			String title = ".proDetail h1"; 			String content = "#Introduction"; 			Elements ele = docdata.select(city); 			city = (ele.text());  			ele = docdata.select(title); 			title = (ele.text()).replace("<", "").replace(">", "").replace("\\/", ""); 			ele = docdata.select(content); 			content = (ele.text()); 			ele = docdata.select(id); 			String[] idary = ele.attr("href").split("\\/"); 			id = idary[idary.length-1]; 			String type = "景点门票";  			List<String> images = new ArrayList<String>(); 			data = new DataBean(id,title,url,content,type,city,images); 			Dom4jUtil.createFile("data/["+type+"]"+title+".xml", Dom4jUtil.createDocument(data)); 			 			type = "景点评论"; 			content = ".userComments dl dd:eq(3)"; 			ele = docdata.select(content); 			content = ""; 			int i = 1; 			for (Element el : ele) { 				content += ("|第"+i+":"+el.text()); 				i++; 			} 			data = new DataBean(id,title,url,content,type,city,images); 			//用xml存储数据 			Dom4jUtil.createFile("data/["+type+"]"+title+".xml", Dom4jUtil.createDocument(data)); 		} catch (Exception e) { 			e.printStackTrace(); 		} 		return data; 	}

整个过程分为几部

1、 获取页面的节点对象

Document docdata = Jsoup.connect(url).timeout(20000).get();

2、创建选择器，选择页面节点对象的 text 或 html  。 选择方式跟jquery非常类似。

例如：

String title = ".proDetail h1";

ele = docdata.select(title);

这个就是用来选择 class = proDetail  下  h1 标签的对象。通过  ele.text()   就得到了标签中的文本。

Document docdata = Jsoup.connect(url).timeout(20000).get(); 			String id = ".quick-menu .last a"; 			String city = ".proDetail a"; 			String title = ".proDetail h1"; 			String content = "#Introduction"; 			Elements ele = docdata.select(city); 			city = (ele.text());  			ele = docdata.select(title); 			title = (ele.text()).replace("<", "").replace(">", "").replace("\\/", ""); 			ele = docdata.select(content); 			content = (ele.text()); 			ele = docdata.select(id); 			String[] idary = ele.attr("href").split("\\/"); 			id = idary[idary.length-1];

String type = "景点门票";  			List<String> images = new ArrayList<String>(); 			data = new DataBean(id,title,url,content,type,city,images); 			Dom4jUtil.createFile("data/["+type+"]"+title+".xml", Dom4jUtil.createDocument(data));

转载注明出处：http://blog.csdn.net/yjflinchong

java采集数据过滤html标签，获取指定数据，就搞定了