我对HtmlUnit还有点陌生，尝试使用HtmlImageInput.click()提交表单遇到些问题。当我调用此方法后，似乎什么都没有发生，没有表单提交，没有与服务器的往返，我检查后也没发现有任何问题。该方法立即返回当前页面。

在图像投入中,没有 Java字事件手。 它只是一个老的面包车图像投入,没有任何特殊作用。 这些投入最初是在装满该网页时提供给残疾人的,然后随着用户与该网页的某些自动自动自动协调机制要素进行互动,便得以投入使用。 但是,到我点击这些投入时,它已经能够做到,因此,我不认为它是一个美国退休人员协会的问题。

有人知道发生了什么吗？可运行的源代码如下。

Thanks, Matthew

import java.io.*;
import java.util.*;
import com.gargoylesoftware.htmlunit.*;
import com.gargoylesoftware.htmlunit.html.*;
import org.w3c.dom.*;

public class Test {

public static void main(String args[]) {

    try {
        WebClient webClient = new WebClient(BrowserVersion.INTERNET_EXPLORER_7);
        webClient.setThrowExceptionOnScriptError(false);
        HtmlPage page = webClient.getPage("http://us.megabus.com");
        System.out.println("got the page");
        HtmlForm form = page.getFormByName("ctl01");
        System.out.println("got the form");
        HtmlSelect select = form.getSelectByName("SearchAndBuy1$ddlLeavingFrom");
        select.click();
        System.out.println("clicked the select");
        HtmlOption option = select.getOptionByValue("13");
        option.click();
        System.out.println("clicked the option...going to sleep");
        try { Thread.sleep(15000); } catch(InterruptedException e) {}
        select = form.getSelectByName("SearchAndBuy1$ddlTravellingTo");
        select.click();
        System.out.println("clicked the select 2");
        option = select.getOptionByValue("37");
        option.click();
        System.out.println("clicked the option 2...going to sleep");
        try { Thread.sleep(15000); } catch(InterruptedException e) {}
        HtmlImage image = (HtmlImage)page.getElementById("SearchAndBuy1_imgOutboundDate");
        image.click();
        System.out.println("clicked the image");
        String month = "April";
        String date = "09";
        HtmlTable table = (HtmlTable)page.getElementById("SearchAndBuy1_calendarOutboundDate");
        HtmlTableRow row = ((HtmlTable)table.getCellAt(0, 0).getChildElements().iterator().next()).getRow(0);
        String monthString = row.getCell(1).getTextContent();
        monthString = monthString.substring(0, monthString.indexOf(   ));
        while(!monthString.equals(month)) {
            row.getCell(2).getChildElements().iterator().next().click();
            System.out.println("clicked to go to the next month");
            try { Thread.sleep(15000); } catch(InterruptedException e) {}
            table = (HtmlTable)page.getElementById("SearchAndBuy1_calendarOutboundDate");
            row = ((HtmlTable)table.getCellAt(0, 0).getChildElements().iterator().next()).getRow(0);
            monthString = row.getCell(1).getTextContent();
            monthString = monthString.substring(0, monthString.indexOf(   ));
        }
        DomNodeList<HtmlElement> aList = table.getElementsByTagName("a");
        for (int i = 0; i < aList.size(); i++) {
            HtmlAnchor anchor = (HtmlAnchor)aList.get(i);
            if (anchor.getAttribute("title").equals(DomElement.ATTRIBUTE_NOT_DEFINED) || anchor.getAttribute("title").equals(DomElement.ATTRIBUTE_VALUE_EMPTY))
                throw new RuntimeException("DomElement ATTRIBUTE_NOT_DEFINED or ATTRIBUTE_VALUE_EMPTY");
            if (anchor.getAttribute("title").equals(month + " " + date)) {
                anchor.click();
                try { Thread.sleep(15000); } catch(InterruptedException e) {}
                break;
            }
        }
        HtmlImageInput imageInput = (HtmlImageInput)page.getElementByName("SearchAndBuy1$btnSearch");
        page = (HtmlPage)imageInput.click();
        System.out.println("clicked search button");

    } catch(FailingHttpStatusCodeException e) {
        e.printStackTrace();
    } catch(IOException e) {
        e.printStackTrace();
    } catch(ElementNotFoundException e) {
        e.printStackTrace();
    } catch(IndexOutOfBoundsException e) {
        e.printStackTrace();
    }
}
}