java - 单击 htmlunit 中的按钮会产生强制转换异常？

Question

当我尝试运行该程序时，除了单击按钮之外，一切正常。当我单击按钮时，出现此异常: java.lang.ClassCastException: com.gargoylesoftware.htmlunit.html.HtmlButtonInput 无法转换为 com.gargoylesoftware.htmlunit.html.HtmlSubmitInput

public class Connect {
    public Connect(int port, String host) {
        WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3/*, host, port*/);
        webClient.setJavaScriptEnabled(true);
        HtmlPage page = null;
        try {
            page = webClient.getPage("localhost/vote.php");
        } catch (IOException e) {
            e.printStackTrace();
        }
        HtmlForm button = page.getFormByName("voted");
        HtmlSubmitInput formSubmit = button.getInputByName("reward");//errors: java.lang.ClassCastException: com.gargoylesoftware.htmlunit.html.HtmlButtonInput cannot be cast to com.gargoylesoftware.htmlunit.html.HtmlSubmitInput
        page.executeJavaScript("setStatus(1);");
        page.executeJavaScript("setStatus(2);");
        page.executeJavaScript("setStatus(3);");
        page.executeJavaScript("canClickReward = true;");

        try {
            formSubmit.click();
        } catch (IOException e) {
            System.out.println("Form Button" + e.getMessage());
        }
        //page.executeJavaScript("document.forms[\"voted\"].submit()"); //Doesn't submit form
        System.out.println(page.asText());
    }
}

有谁知道如何解决 Actor 问题，以便它会单击表单中的按钮？

Answer 1

换行

HtmlSubmitInput formSubmit = button.getInputByName("reward");

至

HtmlButtonInput formSubmit = button.getInputByName("reward");

如果您的 HTML 有，第一行就可以工作

<input type="submit" name="reward" .../>

但显然它已经

<input type="button" name="reward" .../>