抓取HTML网页数据


(转)htmlparse filter使用

该类并不是一个通用的工具类,需要按自己的要求实现,这里只记录了Htmlparse.jar包的一些用法。仅此而已! 
详细看这里:http://gundumw100.javaeye.com/blog/704311

 

import java.util.*;   
import org.htmlparser.Node;   
import org.htmlparser.NodeFilter;   
import org.htmlparser.Parser;   
import org.htmlparser.filters.AndFilter;   
import org.htmlparser.filters.HasAttributeFilter;   
import org.htmlparser.filters.NodeClassFilter;   
import org.htmlparser.filters.TagNameFilter;   
import org.htmlparser.tags.BodyTag;   
import org.htmlparser.tags.LinkTag;   
import org.htmlparser.util.NodeList;   
import org.htmlparser.util.ParserException;   
  
  
public class HtmlparseUtil {   
    WebHttpClient util=new WebHttpClient();   
      
    public Map<String, String> linkGet(String url, String charset) {   
        String content=util.getWebContentByGet(url,charset);   
        Map<String, String> linkMap = new HashMap<String, String>();   
        try {   
            //开始解析   
            Parser parser = Parser.createParser(content, charset);   
            // 过滤出<a></a>标签   
            NodeFilter linkFilter = new NodeClassFilter(LinkTag.class);   
            NodeList list = parser.extractAllNodesThatMatch(linkFilter);   
            Node node = null;   
            for (int i = 0; i < list.size(); i++) {   
                node = list.elementAt(i);   
                // 获得网页中的链接map(href,text)   
                linkMap.put(((LinkTag) node).getLink(), this.processText(((LinkTag) node).getLinkText()));   
            }   
        } catch (ParserException e) {   
            e.printStackTrace();   
        }    
        return linkMap;   
    }   
  
      
    public String bodyGet(String url, String charset) {   
        String content=util.getWebContentByGet(url,charset);   
        String body = "";   
        try {   
            Parser parser = Parser.createParser(content, charset);   
            // 过滤<body></body>标签   
            NodeFilter bodyFilter = new NodeClassFilter(BodyTag.class);   
            NodeList list = parser.extractAllNodesThatMatch(bodyFilter);   
            Node node = null;   
            for (int i = 0; i < list.size(); i++) {   
                node = list.elementAt(i);   
                // 获得网页内容 保存在content中   
                body = ((BodyTag) node).getBody();   
            }   
        } catch (ParserException e) {   
            e.printStackTrace();   
        }   
        return body;   
    }   
  
      
    public Map<String,String> termGet(String url, String charset) {   
        String content=util.getWebContentByGet(url,charset);   
           
        Map<String, String> map = new HashMap<String, String>();   
        try {   
            //开始解析   
            // 过滤出class为term的<span>元素   
            Parser parser = Parser.createParser(content, charset);   
            AndFilter filter =    
                new AndFilter(new TagNameFilter("span"),new HasAttributeFilter("class","term"));   
               
            Node node = null;   
            NodeList nodeList = parser.parse(filter);   
               
            for (int i = 0; i < nodeList.size(); i++) {   
                node = nodeList.elementAt(i);   
                map.put("term", node.toPlainTextString());   
            }   
            // 过滤出class为start-time的<span>元素   
            Parser parser2 = Parser.createParser(content, charset);   
            AndFilter filter2 =    
                new AndFilter(new TagNameFilter("span"),new HasAttributeFilter("class","start-time"));   
            NodeList nodeList2 = parser2.parse(filter2);   
            for (int i = 0; i < nodeList2.size(); i++) {   
                node = nodeList2.elementAt(i);   
                map.put("start-time", node.toPlainTextString());   
            }   
            // 过滤出id为J_SingleEndTimeLabel的<span>元素   
            Parser parser3 = Parser.createParser(content, charset);   
            AndFilter filter3 =    
                new AndFilter(new TagNameFilter("span"),new HasAttributeFilter("id","J_SingleEndTimeLabel"));   
            NodeList nodeList3 = parser3.parse(filter3);   
            for (int i = 0; i < nodeList3.size(); i++) {   
                node = nodeList3.elementAt(i);   
                map.put("end-time", node.toPlainTextString());   
            }   
               
            // 过滤出class为box post的<div>元素   
            Parser parser4 = Parser.createParser(content, charset);   
            AndFilter filter4 =    
                new AndFilter(new TagNameFilter("div"),new HasAttributeFilter("class","box post"));   
            NodeList nodeList4 = parser4.parse(filter4);   
            for (int i = 0; i < nodeList4.size(); i++) {   
                node = nodeList4.elementAt(i);   
                String temp=node.toPlainTextString().trim();   
                temp=temp.substring(10,20).trim();   
                map.put("pre-term", temp);   
            }   
               
            // 过滤出class为J_AwardNumber的<span>元素   
            Parser parser5 = Parser.createParser(content, charset);   
//          AndFilter filter5 =    
//                new AndFilter(new TagNameFilter("span"),new HasAttributeFilter("class","J_AwardNumber"));   
            NodeList nodeList5 = parser5.parse(new HasAttributeFilter("class","J_AwardNumber"));   
            StringBuffer buffer=new StringBuffer();   
            for (int i = 0; i < nodeList5.size(); i++) {   
                node = nodeList5.elementAt(i);   
                buffer.append(","+node.toPlainTextString());   
            }   
            buffer.append("|");   
               
            // 过滤出class为blue J_AwardNumber的<span>元素   
            Parser parser6 = Parser.createParser(content, charset);   
//          AndFilter filter6 =    
//                new AndFilter(new TagNameFilter("span"),new HasAttributeFilter("class","blue J_AwardNumber"));   
            NodeList nodeList6 = parser6.parse(new HasAttributeFilter("class","blue J_AwardNumber"));   
            for (int i = 0; i < nodeList6.size(); i++) {   
                node = nodeList6.elementAt(i);   
                buffer.append(node.toPlainTextString()+",");   
            }   
               
            map.put("numbers", buffer.toString());   
        } catch (ParserException e) {   
            // TODO Auto-generated catch block   
            e.printStackTrace();   
        }   
           
        return map;   
    }   
       
    private String processText(String content){      
        content=content.trim().replaceAll("&nbsp;", "");      
//      content=content.replaceAll("<p>", "\n");      
//      content=content.replaceAll("</TD>", "");      
//      content=content.replaceAll("</div>", "");      
//      content=content.replaceAll("</a>", "");      
//      content=content.replaceAll("<a href=.*>", "");      
        return content;      
    }      
       
    public static void main(String[] str) {   
           
        String url="http://caipiao.taobao.com/lottery/order/lottery_dlt.htm?type=1";   
        HtmlparseUtil util=new HtmlparseUtil();   
        Map<String,String> map=util.termGet(url, "gb2312");   
        System.out.println("term="+map.get("term"));//<span class="term">第<em>10074</em>期</span>   
        System.out.println("start-time="+map.get("start-time"));//   
        System.out.println("end-time="+map.get("end-time"));//   
        System.out.println("pre-term="+map.get("pre-term"));//   
        System.out.println("numbers="+map.get("numbers"));//   
           
          
           
    }   
       
}

 

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