Jsoup解析html抓取網頁數據

package com.test;

import java.io.File;
import java.io.FileWriter;
import java.net.URL;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

/**
 *@Author:liangjilong
 *@Date:2014-8-27
 *@Email:[email protected]
 *
 *@Descript:此程序是抓取中國合格評定國家認可委員會---獲准認可機構
 */
public class TestReptile {
	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {

		String path = "D:/test/test.txt";
		File file = new File(path);
		if (!file.exists()) {
			file.createNewFile();// 不存在就創建一個..
			String newFlie = file.getPath();
			FileWriter fileWriter = new FileWriter(newFlie);
			int page = 150;// 抓取頁數
			for (int i = 1; i <= page; i++) {
				String URL = getUrl(i);// 抓取第一頁的內容
				System.out.println(URL);
				Document doc = Jsoup.parse(new URL(URL), 3000);
				if (doc != null) {
					Elements divtables = doc.getElementsByAttributeValue("class", "divtable");// 獲取div樣式class=divtable裏面的html內容
					for (Element d : divtables) {
						String a_text = d.select("a").html();// 獲取html裏面a標籤的內容
						//System.out.println(a_text);
						fileWriter.write(a_text);
						fileWriter.flush();
					}
				} else {
					System.out.println("網絡異常..");
				}
			}
			fileWriter.close();
		} else {
			System.err.println("文件存在..");
		}
	}
	/**
	 * @param pageSize頁數.
	 * @return
	 */
	public static String getUrl(Integer pageSize){
		String url="http://219.238.178.49/";
		StringBuffer buffer=new StringBuffer(url);
		buffer.append("Acc_Search2.asp?Class=L&page="+pageSize);
		return buffer.toString();
	}
	
}

 

 

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Pattern;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;

/**
 *@Author:liangjilong
 *@Date:2014-9-9 
 */
public class Test2 {
	private static final String regEx_html = "<[^>]+>"; // 定義HTML標籤的正則表達式
	
	/**
	 * @param args
	 */
	public static void main(String[] args)throws Exception {
		Integer pageSize=20;
		getHtml(pageSize);
		
	}
	/**
	 * @param pageSize
	 * @throws IOException
	 */
	private static void getHtml(Integer pageSize) throws IOException {
		Pattern p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);
		for (int i = 1; i <= pageSize; i++) {
			String url=getUrl(i);
			Document doc=Jsoup.connect(url).get();
			if(doc!=null){
				String fileName=doc.getElementsByAttributeValue("class", "T1").html();//抓取class=T1的內容，作爲文件的名稱.
				
				String path = "D:/test/"+fileName+i+".txt";//路徑名/i
				
				File file = new File(path);
				FileWriter fileWriter=null;
				if (!file.exists()) {
				    file.createNewFile();// 不存在就創建一個.
					String newFlie = file.getPath();
					String htmlEl=doc.getElementsByAttributeValue("class", "clabel").html();
					String htmlStr=p_html.matcher(htmlEl).replaceAll("").replaceAll("&quot;", "");// 過濾html標籤
					fileWriter = new FileWriter(newFlie);
					fileWriter.write(htmlStr);
					fileWriter.flush();
				} 
				fileWriter.close();
				
			}else{
				System.err.println("網絡異常！");
			}
		}
		System.out.println("抓取完成~..");
	}

	/**
	 * @param pageSize頁數.
	 */
	public static String getUrl(Integer pageSize){
		String url="http://219.238.178.49/";
		StringBuffer bufferUrl=new StringBuffer(url);
		bufferUrl.append("BaseInfo.asp?Id=");
		if(pageSize<=10){
			if(pageSize==10){
				bufferUrl.append("L000"+pageSize);
			}else{
				bufferUrl.append("L0000"+pageSize);
			}
		}else if(pageSize<=100){
			if(pageSize==100){
				bufferUrl.append("L00"+pageSize);
			}else{
				bufferUrl.append("L000"+pageSize);
			}
		}else if(pageSize<=1000){
			if(pageSize==1000){
				bufferUrl.append("L0"+pageSize);
			}else{
				bufferUrl.append("L00"+pageSize);
			}
		}
		return bufferUrl.toString();
	}
	 
}