如何使用HtmlUnit登录wordpress.com？

<dependency>
    <groupId>net.sourceforge.htmlunit</groupId>
    <artifactId>htmlunit</artifactId>
    <version>2.53.0</version>
</dependency>

import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

WebClient webClient = new WebClient();
webClient.getOptions().setJavaScriptEnabled(false); // 禁用 JavaScript
webClient.getOptions().setCssEnabled(false); // 禁用 CSS

HtmlPage loginPage = webClient.getPage("https://wordpress.com/wp-login.php");

HtmlForm form = loginPage.getForms().get(0); // 假设登录表单是页面上的第一个表单

form.getInputByName("username").setValueAttribute("YourUsername");
form.getInputByName("password").setValueAttribute("YourPassword");

HtmlPage loggedInPage = form.getInputByValue("Log In").click(); // 假设登录按钮的文本是 "Log In"

HtmlElement avatar = loggedInPage.getFirstByXPath("//img[@class='avatar']");
if (avatar != null) {
    System.out.println("登录成功！");
} else {
    System.out.println("登录失败！");
}