JAVA使用HtmlUnit爬虫工具模拟登陆CSDN案例

 <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>

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
{
 //访问的目标网址（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
 {
  // 模拟一个浏览器
  WebClient webClient = new WebClient(BrowserVersion.CHROME);
  // 设置webClient的相关参数
  webClient.setCssErrorHandler(new SilentCssErrorHandler()); 
  //设置ajax
  webClient.setAjaxController(new NicelyResynchronizingAjaxController());
  //设置支持js
  webClient.getOptions().setJavaScriptEnabled(true);
  //CSS渲染禁止
  webClient.getOptions().setCssEnabled(false);
  //超时时间
  webClient.getOptions().setTimeout(50000);
  //设置js抛出异常:false
  webClient.getOptions().setThrowExceptionOnScriptError(false);
  //允许重定向
  webClient.getOptions().setRedirectEnabled(true); 
  //允许cookie
  webClient.getCookieManager().setCookiesEnabled(true); 
  // 模拟浏览器打开一个目标网址
  HtmlPage page = webClient.getPage(TARGET_URL);
  /**等待js加载完全，CSDN这点 特别坑，js加载时间超长！！！！！！！ 后人切记不要用CSDN模拟登陆！！！！！！！**/
  webClient.waitForBackgroundJavaScript(10000*3);
  // 根据form的名字获取页面表单，也可以通过索引来获取：page.getForms().get(0)  
  HtmlForm form = (HtmlForm) page.getElementById("fm1");   
  HtmlTextInput username = (HtmlTextInput) form.getInputByName("username"); 
  HtmlPasswordInput password = (HtmlPasswordInput) form.getInputByName("password"); 
  username.setValueAttribute("********"); //用户名
  password.setValueAttribute("********"); //密码
  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驱动dom完成获得还原后的网页 
  webClient.waitForBackgroundJavaScript(1000); 
  //输出跳转网页的地址
  System.out.println(retPage.getUrl().toString()); 
  //输出跳转网页的内容
  System.out.println(retPage.asXml());
  //获取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!");
 }
}

  //设置日志级别，原页面js异常不打印
  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);