最近要弄一個(gè)爬蟲程序，想著先來個(gè)簡單的模擬登陸， 在權(quán)衡jxbrowser和htmlunit 兩種技術(shù)， jxbowser有界面呈現(xiàn)效果，但是對于某些js跳轉(zhuǎn)之后的效果獲取比較繁瑣。
隨后考慮用htmlunit， 想著借用咱們csnd的登陸練練手。誰知道csdn的登陸，js加載時(shí)間超長，不設(shè)置長一點(diǎn)的加載時(shí)間，按鈕提交根本沒效果，js沒生效。 具體看代碼注釋吧。 奉勸做爬蟲的同志們，千萬別用csdn登陸練手，坑死我了。
maven配置如下：
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<dependencies><!-- https://mvnrepository.com/artifact/net.sourceforge.htmlunit/htmlunit --><dependency><groupid>net.sourceforge.htmlunit</groupid><artifactid>htmlunit</artifactid><version>2.18</version></dependency><!-- https://mvnrepository.com/artifact/org.jsoup/jsoup --><dependency><groupid>org.jsoup</groupid><artifactid>jsoup</artifactid><version>1.9.2</version></dependency></dependencies> |
代碼如下：
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package com.test;import java.io.ioexception;import java.net.malformedurlexception;import java.util.hashmap;import java.util.map;import java.util.set;import com.gargoylesoftware.htmlunit.browserversion;import com.gargoylesoftware.htmlunit.failinghttpstatuscodeexception;import com.gargoylesoftware.htmlunit.nicelyresynchronizingajaxcontroller;import com.gargoylesoftware.htmlunit.silentcsserrorhandler;import com.gargoylesoftware.htmlunit.webclient;import com.gargoylesoftware.htmlunit.html.htmlbuttoninput;import com.gargoylesoftware.htmlunit.html.htmlform;import com.gargoylesoftware.htmlunit.html.htmlpage;import com.gargoylesoftware.htmlunit.html.htmlpasswordinput;import com.gargoylesoftware.htmlunit.html.htmltextinput;import com.gargoylesoftware.htmlunit.util.cookie;public class simulatelogin{ //訪問的目標(biāo)網(wǎng)址（csdn） private static string target_url = "https://passport.csdn.net/account/login?from=http://www.csdn.net"; public static void main(string[] args) throws failinghttpstatuscodeexception, malformedurlexception, ioexception { // 模擬一個(gè)瀏覽器 webclient webclient = new webclient(browserversion.chrome); // 設(shè)置webclient的相關(guān)參數(shù) webclient.setcsserrorhandler(new silentcsserrorhandler()); //設(shè)置ajax webclient.setajaxcontroller(new nicelyresynchronizingajaxcontroller()); //設(shè)置支持js webclient.getoptions().setjavascriptenabled(true); //css渲染禁止 webclient.getoptions().setcssenabled(false); //超時(shí)時(shí)間 webclient.getoptions().settimeout(50000); //設(shè)置js拋出異常:false webclient.getoptions().setthrowexceptiononscripterror(false); //允許重定向 webclient.getoptions().setredirectenabled(true); //允許cookie webclient.getcookiemanager().setcookiesenabled(true); // 模擬瀏覽器打開一個(gè)目標(biāo)網(wǎng)址 htmlpage page = webclient.getpage(target_url); /**等待js加載完全，csdn這點(diǎn) 特別坑，js加載時(shí)間超長！！！！！！！ 后人切記不要用csdn模擬登陸！！！！！！！**/ webclient.waitforbackgroundjavascript(10000*3); // 根據(jù)form的名字獲取頁面表單，也可以通過索引來獲取：page.getforms().get(0) htmlform form = (htmlform) page.getelementbyid("fm1"); htmltextinput username = (htmltextinput) form.getinputbyname("username"); htmlpasswordinput password = (htmlpasswordinput) form.getinputbyname("password"); username.setvalueattribute("********"); //用戶名 password.setvalueattribute("********"); //密碼 htmlbuttoninput button = (htmlbuttoninput) page.getbyxpath("//input[contains(@class, 'logging')]").get(0);// scriptresult result = page.executejavascript("javascript:document.getelementsbyclassname('logging')[0].click()");// htmlpage retpage = (htmlpage) result.getnewpage(); htmlpage retpage = button.click(); // 等待js驅(qū)動dom完成獲得還原后的網(wǎng)頁 webclient.waitforbackgroundjavascript(1000); //輸出跳轉(zhuǎn)網(wǎng)頁的地址 system.out.println(retpage.geturl().tostring()); //輸出跳轉(zhuǎn)網(wǎng)頁的內(nèi)容 system.out.println(retpage.asxml()); //獲取cookie set<cookie> cookies = webclient.getcookiemanager().getcookies(); map<string, string> responsecookies = new hashmap<string, string>(); for (cookie c : cookies) { responsecookies.put(c.getname(), c.getvalue()); system.out.print(c.getname()+":"+c.getvalue()); } webclient.close(); system.out.println("success!"); }} |
另外，csdn的js總是莫名其妙的報(bào)一堆錯(cuò)，如果不想看，想忽略的話，在創(chuàng)建webclient前加上如下代碼：
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//設(shè)置日志級別，原頁面js異常不打印logfactory.getfactory().setattribute("org.apache.commons.logging.log", "org.apache.commons.logging.impl.nooplog"); java.util.logging.logger.getlogger("com.gargoylesoftware.htmlunit") .setlevel(level.off); java.util.logging.logger.getlogger("org.apache.commons.httpclient") .setlevel(level.off); |
總結(jié)
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原文鏈接：https://blog.csdn.net/moneyshi/article/details/78799949
