利用java的url實現小型的網頁爬蟲

時間 2019-12-09

標籤利用 java url 實現小型網頁爬蟲欄目 Java 简体版

原文原文鏈接

　暫時還沒學處理數據的方法，扒下來的數據還包含html的標籤。css

　後面再學。html

package com.imooc;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;

/**
 * Created by ggg on 2018/4/12.
 * 使用url讀取網頁內容
 */
public class test3 {
    public static void main(String[] args){
        try {
            //建立url實例
            URL url = new URL("http://www.baidu.com");
            //經過url的openstream方法獲取URL對象所表示的資源的字節輸入流
            InputStream is=url.openStream();
            //將字節輸入流轉換爲字符輸入流
            InputStreamReader isr = new InputStreamReader(is, "utf-8");
            //爲流添加緩衝
            BufferedReader br=new BufferedReader(isr);
            String data = br.readLine();
            while(data!=null) {
                System.out.println(data);
                data = br.readLine();//讀取下一行
            }
            br.close();
            isr.close();
            is.close();

        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

　　爬出來的數據以下java

<!DOCTYPE html>
<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=http://s1.bdstatic.com/r/www/cache/bdorz/baidu.min.css><title>百度一下，你就知道</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class="bg s_ipt_wr"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofocus></span><span class="bg s_btn_wr"><input type=submit id=su value=百度一下 class="bg s_btn"></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新聞</a> <a href=http://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地圖</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>視頻</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>貼吧</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登陸</a> </noscript> <script>document.write('<a href="http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ '" name="tj_login" class="lb">登陸</a>');</script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">更多產品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>關於百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>使用百度前必讀</a>&nbsp; <a href=http://jianyi.baidu.com/ class=cp-feedback>意見反饋</a>&nbsp;京ICP證030173號&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>