如何在按钮位于另一个div中时单击htmlUnit

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

public class HtmlUnitButtonClickExample {
    public static void main(String[] args) {
        try (WebClient webClient = new WebClient()) {
            // 启用JavaScript执行
            webClient.getOptions().setJavaScriptEnabled(true);

            // 获取目标网页
            HtmlPage page = webClient.getPage("http://example.com");

            // 定位包含按钮的div元素
            HtmlDivision div = page.getFirstByXPath("//div[@id='buttonDiv']");

            // 定位按钮元素
            HtmlButton button = div.getFirstByXPath("//button[@id='submitButton']");

            // 模拟点击按钮
            button.click();

            // 执行其他操作...
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}