HtmlUnit vk授权

Question

我是新的Html单位，我试图进入vk网站，但每次它都不想进入这个网站。我看了几个教程，里面有几乎相同的代码，有了这个代码，我就进入了https://news.ycombinator.com/

这是我的代码；

import java.util.logging.*;

import org.apache.commons.logging.LogFactory;

import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlButton;
import com.gargoylesoftware.htmlunit.html.HtmlForm;
import com.gargoylesoftware.htmlunit.html.HtmlInput;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

public class ContactApp {

public static WebClient login(String url , String login , String password) throws Exception {
    // create webClient
    WebClient webClient = new WebClient();

    //open logger
    loggingAll();

    // options for loggers 
    webClient.getOptions().setJavaScriptEnabled(true);
    webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
    webClient.getOptions().setThrowExceptionOnScriptError(false);

    // setting all configuration
    HtmlPage page = webClient.getPage(url);
    HtmlForm htmlForm = page.getFirstByXPath("//*[@id=\"login_form\"]");
    HtmlInput loginInput = htmlForm.getFirstByXPath("//*[@id=\"email\"]");
    HtmlInput passwordInput = htmlForm.getFirstByXPath("//*[@id=\"pass\"]");

    // set login and password attribute
    loginInput.setValueAttribute(login);
    passwordInput.setValueAttribute(password);
    HtmlButton buttonClick = htmlForm.getFirstByXPath("//*[@id=\"login_button\"]");

    htmlForm = buttonClick.getEnclosingForm();
    HtmlPage htmlPage = webClient.getPage(htmlForm.getWebRequest(null));
    return webClient;
}

public static void main(String[] args) throws Exception{
    String url = "https://vk.com/login";
    String username = "login";
    String password = "password";

    System.out.println("Start !!!");

    WebClient webClient = login(url , username , password);
    HtmlPage page = webClient.getPage("https://vk.com/mypage");

    // I am checking getting a name to my page by xpath;
    String entering = page.getFirstByXPath("//*[@id=\"page_info_wrap\"]/div[1]/h2");

    // Entering to the site // 
    // He always send me - null in text; 
    System.out.println(entering);

    System.out.println("End!!!");
}

}

这是我的逻辑，谢谢你；

Answer 1

如果你想登录https://vk.com/mypage，你需要调整XPath，因为它有不同的html和it。举个例子，这个站点上的html表单的id是"quick_login_form“。在火狐中按F12，然后进入inspect选项卡。您可以在那里看到html和html dom项的ids。