利用HttpClient抓取HTML資料

抓取位址:http://www.120ask.com
           

package com.ninemax.ak.html;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * 直接調用底層URL
 * 
 * @author darker
 *
 */
public class HtmlHttpClient {
	
	public static void main(String[] args)  {
		
		HtmlMethod method = new HtmlMethod();
		
		List<String> urlList = new ArrayList<String>(
				Arrays.asList(new String[] {
				"http://www.120ask.com/list/jzxjb/",
				"http://www.120ask.com/list/tnbz/" 
				}));
		
		int page = 200;
		String classify = "内科";
		String section = "内分泌科";
		for(String url : urlList){
			Long start = System.currentTimeMillis();
			for (int i = 1; i <= page; i++) {
				if (i == 1) {
					method.getSubUrl(classify, section, url, i);
				} else {
					method.getSubUrl(classify, section, url + "all/" + i, i);
				}
			}
			System.out.println(url + "用時:" + (System.currentTimeMillis()-start));
		}
		
	}
}
           

主要代碼

package com.ninemax.ak.html;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.ninemax.ak.base.SpringContextUtil;
import com.ninemax.ak.dao.CommonDao;

public class HtmlMethod {
	
	public CommonDao commonDao = SpringContextUtil.getBean("commonDao");
	
	HtmlParser htmlParser = new HtmlParser();
	
	String webId = "120ASK";
	String qid = "";
	// 提問的ID
	int qcount = 0;
	// 回答的ID
	int acount = 0;
	List<Map<String,Object>> q_result = new ArrayList<Map<String,Object>>();
	List<Map<String,Object>> a_result = new ArrayList<Map<String,Object>>();
	
	/**
	 * 2級頁面
	 * 
	 * @param classify
	 * @param second_url
	 */
	public void getUrlAndSection(String classify,String second_url) {
		
		// 調用httpClient方法,傳回抓取的頁面
		 String second_html = HtmlUtil.getHtmlByURL(second_url);
		// 擷取<div>文本
		String second_details_html = htmlParser.get_TagNode_Html(second_html, "div", "class", "h-left fl");
		// 擷取<ul>文本		
		String second_ul_html =htmlParser. get_TagNode_Html(second_details_html, "ul", "class", "clears h-ul1");
		// 擷取<li>數組
		List<String> second_li_List = htmlParser.get_TagNode_HtmlList(second_ul_html,"li");
		// 總頁數
		int totalPage = 200;
		// 取url和section
		if (!HtmlUtil.isEmptyList(second_li_List)) {
			for (String str_li : second_li_List) {
				// 擷取連結
				String third_url = htmlParser.get_TagNode_attr(str_li, "a", "href");
				// 擷取連結名稱
				String section = htmlParser.get_LinkTag_text(str_li, "a");
				// 調用2級url進入3級頁面,問題
				for (int i = 1; i <=totalPage; i++) {
					if (i == 1) {
						getSubUrl(classify, section, third_url, i);
					} else {
						getSubUrl(classify, section, third_url + "all/" + i, i);
					}
				}
			}
		}
	}
	
	/**
	 * 3級頁面
	 * 
	 * @param classify
	 * @param section
	 * @param url
	 */
	public void getSubUrl(String classify,String section,String third_url,int page) {
		
		String third_html = HtmlUtil.getHtmlByURL(third_url);
		// 擷取<div>文本
		String third_details_html = htmlParser.get_TagNode_Html(third_html, "div", "class", "t13 h-main");
		// 擷取<ul>文本
		String third_ul_html = htmlParser.get_TagNode_Html(third_details_html, "ul", "class", "clears h-ul3");
		// 擷取<li>數組		
		List<String> third_li_List = htmlParser.get_TagNode_HtmlList(third_ul_html, "li");
		
		if (!HtmlUtil.isEmptyList(third_li_List)) {
			for (String str_li : third_li_List) {
				// 擷取提問标簽
				String li_a_html = htmlParser.get_TagNode_Html(str_li, "a", "class", "q-quename");
				// 擷取連結
				String suburl = htmlParser.get_TagNode_attr(li_a_html, "a", "href");
				// 擷取連結名稱
				String title = htmlParser.get_LinkTag_text(li_a_html, "a");
				
				getDetails(classify,third_url,section,suburl,title,page);
			}
		}
	}
	
	/**
	 * 回答問題詳情
	 * 
	 * @param classify
	 * @param url
	 * @param section
	 * @param suburl
	 * @param title
	 */
	public void getDetails(String classify,String url,String section,String suburl,String title,int page){
		
		String details_html = HtmlUtil.getHtmlByURL(suburl);
		// 擷取<div>文本
		String ask_html_information = htmlParser.get_TagNode_Html(details_html, "div", "class", "b_askbox");
		// 擷取提問者html
		List<String> q_details_List = htmlParser.get_TagNode_HtmlList(htmlParser.get_TagNode_Html(ask_html_information, "div", "class", "b_askab1"), "span");
		// 計數器
		int count = 0;
		// 取sex和age
		String sex = "";
		String age = "";
		String editTime = "";
		if (!HtmlUtil.isEmptyList(q_details_List)) {
			for (String details : q_details_List) {
				count++;
				if (count == 1) {
					String sexAndage = details.replace("<span>", "").replace("</span>", "");
					sex = sexAndage.split("")[1];
					age = sexAndage.substring(4, sexAndage.length());
				} else if (count == 2 || count == 3 || count == 4) {
					String time = details.trim().replace("<span>", "").replace("</span>", "");
					if (time.startsWith("2017")) {
						editTime = time;
					}
				}
			}
		}
		// 問題
		String question = htmlParser.get_TagNode_Html(ask_html_information, "p", "class", "crazy_new").replace("<p class='crazy_new'>", "").replace("<span>", "").replace("</span>", "").replace("</p>", "").replace("&nbsp;", "").replace(" ", "");
		// 擷取username
		String username = htmlParser.get_TagNode_Html(htmlParser.get_TagNode_Html(ask_html_information, "div", "class", "b_answerarea"), "span").replace(htmlParser.get_TagNode_Html(htmlParser.get_TagNode_Html(htmlParser.get_TagNode_Html(ask_html_information, "div", "class", "b_answerarea"), "span"),"a"), "").replace("<span>釋出人：", "").replace("</span>", "").replace("<var class=\"ask_Author\">", "").replace("</var>", "").replace(" ", "");
		Map<String, Object> qtmp = new HashMap<String, Object>();
		qid = webId + HtmlUtil.getStringByLength(12, ++qcount);
		qtmp.put("id", qid);
		qtmp.put("classify", classify);
		qtmp.put("section", section);
		qtmp.put("question", question);
		qtmp.put("title", title);
		qtmp.put("editTime", editTime);
		qtmp.put("url", url);
		qtmp.put("suburl", suburl);
		qtmp.put("username", username);
		qtmp.put("sex", sex);
		qtmp.put("age", age);
		qtmp.put("page", page);
		q_result.add(qtmp);
		// 添加到資料庫
		try {
			commonDao.saveList(null, "120ask_q", q_result, HtmlUtil.splitList("id,classify,section,question,title,editTime,url,suburl,username,sex,age,page", ","));
		} catch (Exception e) {
			e.printStackTrace();
		}
		// 擷取N個回答者html
		List<String> a_details_List = htmlParser.get_TagNode_HtmlList(htmlParser.get_TagNode_Html(details_html, "div", "class", "b_answerbox t10"), "div", "class", "b_answerli");
		// 周遊答案
		for(String answerHtml : a_details_List){
			String answerDepartment = "";
			String answerHospital = "";
			String answerSpeciality = "";
			// 回答者的URL
			String answerUrl = htmlParser.get_TagNode_attr(answerHtml, "a", "href");
			// 提示資訊
			System.out.println("url:" + answerUrl);
			// 回答者詳細資訊
			// 排序僞連結
			if (answerUrl != null) {
				String answer_identification_html = htmlParser.get_TagNode_Html(HtmlUtil.getHtmlByURL(answerUrl), "div", "class", "contAbout");
				// 醫院
				answerHospital = htmlParser.get_TagNode_Html(htmlParser.get_TagNode_Html(answer_identification_html, "p", "class", "p2 clears"), "span").replace("<span><b>醫院：</b>", "").replace("</span>", "").trim();
				// 科室
				List<String> answer_identification_html2 = htmlParser.get_TagNode_HtmlList(answer_identification_html, "p", "class", "p2 clears p3");
				int answerCount = 0;
				for(String tmpHtml : answer_identification_html2){
					answerCount ++;
					if(answerCount == 1){
						answerDepartment = htmlParser.get_TagNode_Html(tmpHtml,"span").replace("<span><b>科室：</b>", "").replace("</span>", "").replace(" ", "");
					}
				}
				// 回答者技能
				answerSpeciality = htmlParser.get_TagNode_Html(answer_identification_html, "p", "class", "p4").replace("<p class=\"p4\"><b>擅長：</b>","").replace("</p>", "").replace(" ", "");
			}
				// 回答者的姓名
				String answerName = htmlParser.get_LinkTag_text(htmlParser.get_TagNode_Html(answerHtml, "span","class","b_sp1"),"a");
				// 回答者的工作
				String answerJob = htmlParser.get_TagNode_Html(answerHtml, "span","class","b_sp1").replace(htmlParser.get_TagNode_Html(htmlParser.get_TagNode_Html(answerHtml, "span","class","b_sp1"), "a","title","檢視這個會員資訊"), "").replace("<span class=\"b_sp1\"> ", "").replace("</span>", "").replace("<i>", "").replace("</i>", "").replace(" ", "");
				// 回答的内容
				String answerContent = htmlParser.get_TagNode_Html(answerHtml, "p").replace("&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;", "").replace("<p>", "").replace("</p>", "").replace("<br />", "").replace(" ", "");
				// 回答的時間
				String answerTime = htmlParser.get_TagNode_Html(answerHtml, "span","class","b_anscont_time").replace(htmlParser.get_TagNode_Html(htmlParser.get_TagNode_Html(answerHtml, "span","class","b_anscont_time"), "a","title","對這個回答進行投訴"), "").replace("<span class=\"b_anscont_time\">", "").replace("</span>", "").trim();
				Map<String,Object> atmp = new HashMap<String,Object>();
				// 封裝資料								
				atmp.put("id",qid + HtmlUtil.getStringByLength(3,++acount));
				atmp.put("qid", qid);
				atmp.put("job", answerJob);
				atmp.put("hospital", answerHospital);
				atmp.put("department", answerDepartment);
				atmp.put("speciality", answerSpeciality);
				atmp.put("answer", answerContent);
				atmp.put("quicktime", answerTime);
				atmp.put("url", answerUrl);
				atmp.put("username", answerName);
				atmp.put("page", 1);
				a_result.add(atmp);
			}
		try {
			commonDao.saveList(null, "120ask_a", a_result,HtmlUtil.splitList("id,qid,job,hospital,department,speciality,username,answer,quicktime,url,page", ","));
		} catch (Exception e) {
			e.printStackTrace();
		}
		a_result = new ArrayList<Map<String, Object>>();
		q_result = new ArrayList<Map<String, Object>>();
		// 問題ID重置
		acount = 0;
	}
}
           

HTML解析類

package com.ninemax.ak.html;

import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.htmlparser.NodeFilter;
import org.htmlparser.Parser;
import org.htmlparser.filters.AndFilter;
import org.htmlparser.filters.HasAttributeFilter;
import org.htmlparser.filters.TagNameFilter;
import org.htmlparser.nodes.TagNode;
import org.htmlparser.tags.LinkTag;
import org.htmlparser.util.NodeList;
import org.htmlparser.util.ParserException;


public class HtmlParser {
	
	public static Logger log = Logger.getLogger(HtmlParser.class);
	
	/**
	 * 擷取HTML節點
	 * @param html
	 * @param TagNodeName 節點名稱
	 * @return HTML文本
	 */
	public String get_TagNode_Html(String html,String TagNodeName){
		
		String subhtml = "";

		try {
			Parser parser = new Parser(html);

			NodeFilter tagNode = new TagNameFilter(TagNodeName);

			NodeList nodes = parser.parse(tagNode);
			if (nodes != null && nodes.size() > 0) {
				TagNode textnode = (TagNode) nodes.elementAt(0);
				subhtml = textnode.toHtml();
			}
		} catch (ParserException e) {
			e.printStackTrace();
		}
		return subhtml;
	}
	
	/**
	 * 擷取HTML節點
	 * @param html
	 * @param TagNodeName 節點
	 * @param setAttrName 屬性名
	 * @param setAttrValue 屬性值
	 * @return HTML文本
	 */
	public String get_TagNode_Html(String html, String TagNodeName,String setAttrName, String setAttrValue) {

		String second_details_html = "";

		try {
			Parser parser = new Parser(html);
			NodeFilter tagNode = new TagNameFilter(TagNodeName);
			NodeFilter attrNode_name = new HasAttributeFilter(setAttrName,setAttrValue);
			NodeFilter andNode = new AndFilter(tagNode, attrNode_name);
			NodeList nodes = parser.extractAllNodesThatMatch(andNode);
			if (nodes != null && nodes.size() > 0) {
				TagNode textnode = (TagNode) nodes.elementAt(0);
				second_details_html = textnode.toHtml();
			}
		} catch (ParserException e) {
			e.printStackTrace();
		}
		return second_details_html;
	}
	
	/**
	 * 擷取HTML節點數組
	 * @param html 
	 * @param TagNodeName 節點名稱
	 * @return 節點數組
	 */
	public List<String> get_TagNode_HtmlList(String html,String TagNodeName) {
		
		List<String> result = new ArrayList<String>();
		
		NodeList nodes=null;
		try {
			Parser parser = new Parser(html);
			NodeFilter tagNode = new TagNameFilter(TagNodeName);
			nodes = parser.parse(tagNode);
		} catch (ParserException e) {
			e.printStackTrace();
		}
		if (nodes != null && nodes.size() > 0) {
			for (int i = 0; i < nodes.size(); i++) {
				TagNode textnode = (TagNode) nodes.elementAt(i);
				String s = textnode.toHtml();
				if (!HtmlUtil.isEmptyTrim(s)) {
					result.add(s);
				}
			}
		}

		return result;
	}
	
	/**
	 * 擷取指定屬性HTML節點
	 * @param html
	 * @param TagNodeName 節點名稱
	 * @param setAttrName 屬性名稱
	 * @param setAttrValue 屬性值
	 * @return HTML文本集合
	 */
	public List<String> get_TagNode_HtmlList(String html,String TagNodeName ,String setAttrName ,String setAttrValue) {
		
		List<String> result = new ArrayList<String>();
		
		NodeList nodes = null;
		try {
			Parser parser = new Parser(html);
			NodeFilter tagNode = new TagNameFilter(TagNodeName);
			NodeFilter attrNode_name = new HasAttributeFilter(setAttrName,setAttrValue);
			NodeFilter andNode = new AndFilter(tagNode, attrNode_name);
			nodes = parser.extractAllNodesThatMatch(andNode);
		} catch (ParserException e) {
			log.error("html:" + html, e);
		}
		if (nodes != null && nodes.size() > 0) {
			for (int i = 0; i < nodes.size(); i++) {
				TagNode textnode = (TagNode) nodes.elementAt(i);
				String s = textnode.toHtml();
				if (!HtmlUtil.isEmptyTrim(s)) {
					result.add(s);
				}
			}
		}

		return result;
	} 
	
	/**
	 * 擷取HTML節點的屬性
	 * @param html
	 * @param TagNodeName 節點名稱
	 * @param getAttrName 屬性名稱
	 * @return
	 */
	public String get_TagNode_attr(String html, String TagNodeName,String getAttrName) {
		
		String attr = "";
		
		NodeList nodes = null;
		try {
			Parser parser = new Parser(html);
			NodeFilter tagNode = new TagNameFilter(TagNodeName);
			nodes = parser.parse(tagNode);
		} catch (ParserException e) {
			e.printStackTrace();
		}
		if (nodes != null && nodes.size() > 0) {
			TagNode textnode = (TagNode) nodes.elementAt(0);
			attr = textnode.getAttribute(getAttrName);
		}

		return attr;
	}
	
	/**
	 * 擷取A标簽連結名稱
	 * @param html
	 * @param TagNodeName A
	 * @return
	 */
	public String get_LinkTag_text(String html,String TagNodeName) {
		
		String text="";
		
		NodeList nodes=null;
		try {
			 Parser parser = new Parser(html);
			 NodeFilter tagNode=new TagNameFilter(TagNodeName);
	         nodes = parser.parse(tagNode); 
		} catch (ParserException e) {
			e.printStackTrace();
		}
	 	if(nodes!=null&&nodes.size()>0) {
	 		LinkTag textnode = (LinkTag) nodes.elementAt(0);
		   	text = textnode.getLinkText().trim();
	 	} 
 		return text;
	}
	
}
           

工具類

package com.ninemax.ak.html;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.methods.GetMethod;

public class HtmlUtil {

	/**
	 * 組裝字元串
	 * 
	 * @param length
	 * @param count
	 * @return
	 */
	public static String getStringByLength(Integer length, Object count) {
		String str = count.toString();
		if (length > 0 && null != count) {
			StringBuffer sb = new StringBuffer();
			for (int i = 0; i < length; i++) {
				sb.append(0);
			}
			str = str.length() >= length ? str : sb.substring(str.length())
					+ str;
		}
		return str;
	}

	/**
	 * 根據URL得到HTML
	 * 
	 * @param url
	 * @return
	 */
	public static String getHtmlByURL(String url) {

		HttpClient client = new HttpClient();
		// 設定通路的URL
		HttpMethod method = new GetMethod(url);
		// 執行通路
		try {
			client.executeMethod(method);

			String html = method.getResponseBodyAsString();

			return clearHtml(html);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 處理HTML
	 * 
	 * @param html
	 * @return
	 */
	public static String clearHtml(String html) {
		if (null != html) {
			return html.replace("&nbsp;", " ")
					.replaceAll("[\\f\\n\\r\\t\\v]", "")
					.replaceAll("<!--(?!-->).*?-->", "")
					.replaceAll("<script(?!</script>).*?</script>", "");
		}
		return null;
	}

	public static double stringToDouble(String s) {
		double result = 0;
		if (s.indexOf("/") != -1) {// 對付分号類型的
			double fenZi = Double.parseDouble(s.split("/")[0]);
			double fenMu = Double.parseDouble(s.split("/")[1]);
			result = fenZi / fenMu;
			return result;// 處理分數類型的
		} else {

			return Double.parseDouble(s);// 處理小數和整數類型的
		}
	}

	/**
	 * 判斷字元串是否為空
	 * 
	 * @param s
	 * @return
	 */
	public static boolean isNullOrEmpty(String s) {
		return null == s || s.length() < 1;

	}

	/**
	 * 判斷字元串是否為空或者空格
	 * 
	 * @param s
	 * @return
	 */
	public static boolean isEmptyTrim(String s) {
		return null == s || s.trim().length() < 1;

	}

	/**
	 * 判斷list是否為空
	 * 
	 * @param list
	 * @return
	 */
	public static boolean isEmptyList(List<?> list) {
		return null == list || list.size() <= 0;
	}

	/**
	 * 判斷map是否為空
	 * 
	 * @param map
	 * @return
	 */
	public static boolean isEmptyMap(Map<?, ?> map) {
		return null == map || map.size() <= 0;
	}

	public static List<String> splitList(String in, String split) {
		String[] ss = in.split(split);
		List<String> tags = new ArrayList<String>();
		for (String s : ss) {
			if (s.trim().length() > 0) {
				tags.add(s.trim());
			}
		}
		return tags;
	}

	public static String splitCollection(Collection<String> in, String split) {
		StringBuffer sb = new StringBuffer();
		if (null != in && in.size() > 0) {
			for (String t : in) {
				if (null != t && t.trim().length() > 0) {
					sb.append(t.trim()).append(split);
				}
			}

		}
		return sb.length() > 0 ? sb.substring(0, sb.lastIndexOf(split)) : "";
	}

}
           

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原文連結：https://blog.csdn.net/weixin_33774883/article/details/92040556