htmlUnit单击链接按钮-Java

编辑： 为了让整个事情变得清楚，我要做的是让程序转到并点击红色的“输入并投票”按钮

我试图做的是以编程方式访问一个网页，然后单击

href

按钮，如下所示：

<a href="http://www.ultimateprivateservers.com/index.php?a=in&amp;u=IkovPS&amp;sid=cSnJc3vgjV1P8rOe3l88Dv5ut1Wx1aBU" class="btn btn-danger">Enter and vote</a>

WebElement button = wait.until(ExpectedConditions.visibilityOfElementLocated(By.linkText("Enter and vote")));

下面是控制台日志：

    SEVERE: IOException when getting content for iframe: url=[http://a.tribalfusion.com/p.media/aPmQ0x0qPp4WYBPGZbE4PJZdodZanVdfb0bQjYrBeXaisRUvDUFB5WHn0mFBoRU7y1T3s5TUj2qfXmEjIYbYgUHBUoP7Cns7uptfG5Evl5teN5ABLpbbL0V7R1VF3XGjNmqJQ3FQ2WFJBW6Q2QEf1ScUMQdUOYtbuTPbx2G32XrnZcVmun4PQgQmnH4HQrXHBAMTAJplZd1Wp/3002246/adTag.html]
org.apache.http.client.ClientProtocolException
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:188)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
    at com.gargoylesoftware.htmlunit.HttpWebConnection.getResponse(HttpWebConnection.java:178)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection(WebClient.java:1313)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponse(WebClient.java:1230)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:338)
    at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPageIfPossible(BaseFrameElement.java:184)
    at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPage(BaseFrameElement.java:122)
    at com.gargoylesoftware.htmlunit.html.HtmlPage.loadFrames(HtmlPage.java:1993)
    at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:238)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:475)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:342)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:407)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:392)
    at HtmlUnitFormExample.main(HtmlUnitFormExample.java:7)
Caused by: org.apache.http.HttpException: Unsupported Content-Coding: none
    at org.apache.http.client.protocol.ResponseContentEncoding.process(ResponseContentEncoding.java:98)
    at org.apache.http.protocol.ImmutableHttpProcessor.process(ImmutableHttpProcessor.java:139)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:200)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186)
    ... 14 more

Apr 18, 2015 5:28:37 AM com.gargoylesoftware.htmlunit.IncorrectnessListenerImpl notify
WARNING: Obsolete content type encountered: 'application/x-javascript'.
Exception in thread "main" com.gargoylesoftware.htmlunit.ElementNotFoundException: elementName=[*] attributeName=[name] attributeValue=[btn btn-danger]
    at com.gargoylesoftware.htmlunit.html.HtmlPage.getElementByName(HtmlPage.java:1747)
    at HtmlUnitFormExample.main(HtmlUnitFormExample.java:10)

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非常感谢您的帮助。

我查看了页面，并能够使用稍微不同的方法进行投票。我更喜欢使用Selenium（）。我能够在Java中使用Selenium，使用下面非常粗糙的代码成功地进行投票。您可以根据自己的具体需要编辑和优化此代码。我在一个InternetExplorer驱动程序中观看了整个过程，但是如果不希望窗口显示，也可以使用PhantomJS（）作为驱动程序。这是我的简单代码，setProperty方法的第二个参数是驱动程序可执行文件的路径，这对您的计算机是唯一的（您也可以在Selenium下载页面上下载IE驱动程序）：

等待页面加载的更好方法如下：

<a href="http://www.ultimateprivateservers.com/index.php?a=in&amp;u=IkovPS&amp;sid=cSnJc3vgjV1P8rOe3l88Dv5ut1Wx1aBU" class="btn btn-danger">Enter and vote</a>

WebElement button = wait.until(ExpectedConditions.visibilityOfElementLocated(By.linkText("Enter and vote")));

您还可以使用类找到按钮，如：

WebElement button = wait.until(ExpectedConditions.visibilityOfElementLocated(By.className("btn-danger")));

---

尝试使用page.getElementbyID（“此处指定div ID而不是类名”）。在您的代码中，您所做的是相反的。@rakeeee按钮没有div ID，它所在的div包含两个按钮：s