如何下载放置在图像按钮中的文件- HTMLUNIT

点击图片按钮下载文件

有这个链接

我一直在尝试下载文件(两个保存图标图像按钮)。当我点击图片时，它提示下载zip文件。

这是在页面的VIEWSOURCE按钮

<input type="image" name="ctl00$m$g_b265ad4d_cd49_41f3_a9f2_0090f0aa5504$ctl00$gvBidSetsFile$ctl02$ImageButton1" id="ctl00_m_g_b265ad4d_cd49_41f3_a9f2_0090f0aa5504_ctl00_gvBidSetsFile_ctl02_ImageButton1" title="Download" src="/SiteAssets/images/saveitem.gif" style="height:18px;width:18px;border-width:0px;">
    WebClient client = new WebClient(BrowserVersion.FIREFOX_38);
    HtmlPage homePage = null;
   // Document doc = null;  
    String base="https://bidset.nycsca.org/SitePages/Obtain%20Solicitation.aspx?SN=16-15323D-1&ReqType=Solicitation&IsDlg=1&IsDlg=1";
    try {
        client.getOptions().setUseInsecureSSL(true);
    client.setAjaxController(new NicelyResynchronizingAjaxController());
    client.waitForBackgroundJavaScript(1000);
    client.waitForBackgroundJavaScriptStartingBefore(1000);
    client.getOptions().setThrowExceptionOnFailingStatusCode(false);
    client.getOptions().setThrowExceptionOnScriptError(false);
    homePage = client.getPage(base);
    synchronized (homePage) {
        homePage.wait(5000);
    }
    System.out.println("file Page : " + homePage.getUrl());
   // Document dd = Jsoup.parse(homePage.asXml());
    HtmlInput docs= homePage.getFirstByXPath("//input[@id='ctl00_m_g_b265ad4d_cd49_41f3_a9f2_0090f0aa5504_ctl00_gvBidSetsFile_ctl02_ImageButton1']");
        homePage = bidDocs.click();

问题:当我得到

HtmlInput docs =  homePage.getFirstByXPath
 ("//input[@id='ctl00_m_g_b265ad4d_cd49_41f3_a9f2_0090f0aa5504_ctl00_gvBidSetsFile_ctl02_ImageButton1']");

是否可以执行，

homePage = bidDocs.click();

这里点击保存图标下载文件。

1. 我很困惑我怎么能下载这个文件与HTMLUNIT的帮助。我想在我的本地驱动器上下载文件。

2. 是否可以在(homepage = bidDocs.click();)

。存储链接，String docurl=get homePage's link . ????

    File file = new File("C:/TRY/file/abc.zip");
    BufferedInputStream in = null;
    FileOutputStream fout = null;
    try {
        in = new BufferedInputStream(new URL(docUrl).openStream());
        fout = new FileOutputStream(file);
        final byte data[] = new byte[1024];
        int count;
        while ((count = in.read(data, 0, 1024)) != -1) {
            fout.write(data, 0, count);
        }
    } finally {
        if (in != null) {
            in.close();
        }
        if (fout != null) {
            fout.close();
        }
    }