Java Selenium WebDriver:无法访问下拉列表（未排序列表）的元素
我试图访问无序列表中的元素，但这似乎是个问题。这是我的功能代码Java Selenium WebDriver:无法访问下拉列表（未排序列表）的元素,java,selenium,selenium-webdriver,webdriver,Java,Selenium,Selenium Webdriver,Webdriver,我试图访问无序列表中的元素，但这似乎是个问题。这是我的功能代码 public void getLinks() throws Exception { new WebDriverWait(driver, 10).until(ExpectedConditions.visibilityOfElementLocated(By.id("create-study"))); driver.findElement(By.id("create-study")).click()
public void getLinks() throws Exception
{
new WebDriverWait(driver, 10).until(ExpectedConditions.visibilityOfElementLocated(By.id("create-study")));
driver.findElement(By.id("create-study")).click();
Thread.sleep(600);
List<WebElement> studyLinks = driver.findElements(By.cssSelector("#warren-nav > div.collapse.navbar-collapse.navbar-ex1-collapse > ul > li.dropdown.open > ul"));
int sSize = studyLinks.size();
System.out.println("No of links: " + sSize);
}
public void getLinks（）引发异常
{
新WebDriverWait（驱动程序，10）。直到（预期条件。元素的可视性定位（By.id（“创建研究”）））；
driver.findElement（By.id（“创建研究”））。单击（）；
睡眠（600）；
List studyLinks=driver.findElements（按.cssSelector（“#warren nav>div.collapse.navbar-collapse.navbar-ex1-collapse>ul>li.dropdown.open>ul”）；
int sSize=studyLinks.size（）；
System.out.println（“链接数：+sSize”）；
}
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#" id="create-study">
<i class="fa fa-plus-circle warren-nav-icon"></i>Create
</a>
<ul class="dropdown-menu create-dropdown">
<li data-study-type="event">
<a href="/finance/warren/studies/new/kensho.event" class="create-study-link event" target="_self">
<i class="fa fa-calendar" title="event"></i> Event Analysis
</a>
</li>
<li data-study-type="cyclical">
<a href="/finance/warren/studies/new/kensho.cyclical" class="create-study-link cyclical" target="_self">
<i class="fa fa-retweet" title="cyclical"></i> Cyclical Analysis
</a>
</li>
<li data-study-type="conditional">
<a href="/finance/warren/studies/new/kensho.conditional" class="create-study-link conditional" target="_self">
<i class="fa fa-random" title="conditional"></i> Conditional Analysis
</a>
</li>
<li data-study-type="multi_condition">
<a href="/finance/warren/studies/new/kensho.multi_condition" class="create-study-link multi_condition" target="_self">
<i class="fa fa-random" title="multi_condition"></i> Multiple Conditions Analysis
</a>
</li>
<li data-study-type="relative">
<a href="/finance/warren/studies/new/kensho.relative" class="create-study-link relative" target="_self">
<i class="fa fa-bar-chart-o" title="relative"></i> Relative Analysis
</a>
</li>
<li data-study-type="relative_multiple">
<a href="/finance/warren/studies/new/kensho.relative_multiple" class="create-study-link relative_multiple" target="_self">
<i class="fa fa-bar-chart-o" title="relative_multiple"></i> Relative Analysis: Multiple Date Ranges
</a>
</li>
<li data-study-type="regime_change">
<a href="/finance/warren/studies/new/kensho.regime_change" class="create-study-link regime_change" target="_self">
<i class="fa fa-globe" title="regime_change"></i> Global Scenario Analysis
</a>
</li>
<li data-study-type="consensus_analysis">
<a href="/finance/warren/studies/new/kensho.consensus_analysis" class="create-study-link consensus_analysis" target="_self">
<i class="fa fa-puzzle-piece" title="consensus_analysis"></i> Economic Consensus/Surprise Analysis
</a>
</li>
<li data-study-type="trigger">
<a href="/finance/warren/studies/new/kensho.trigger" class="create-study-link trigger" target="_self">
<i class="fa fa-random" title="trigger"></i> Trigger Analysis
</a>
</li>
<li data-study-type="earnings_analysis">
<a href="/finance/warren/studies/new/kensho.earnings_analysis" class="create-study-link earnings_analysis" target="_self">
<i class="fa fa-dot-circle-o" title="earnings_analysis"></i> Earnings Consensus/Surprise Analysis
</a>
</li>
<li data-study-type="price_movement_analysis">
<a href="/finance/warren/studies/new/kensho.price_movement_analysis" class="create-study-link price_movement_analysis" target="_self">
<i class="fa fa-line-chart" title="price_movement_analysis"></i> Price Movement Trigger Analysis
</a>
</li>
</ul>
</li>
谁能告诉我我做错了什么吗。谢谢我想你停得太早了，因为你想数一数a元素，你还需要“询问”它们 我还将选择器缩减到有趣的部分：
List<WebElement> studyLinks = driver.findElements(By.cssSelector(" li.dropdown > ul > a"));
List studyLinks=driver.findElements（By.cssSelector（“li.dropdown>ul>a”）；
我在css查询中不理解的是，您试图找到一个li元素，它的类为“dropdown”和“open”，其中html代码只显示一个带有“dropdown”类的li，而不显示一个带有“open”类的li。但可能您没有发布所有代码。如果您不介意使用xpath：
List<WebElement> studyLinks = driver.findElements(By.xpath("//*[contains(@href, 'finance')]"));
List studyLinks=driver.findElements（By.xpath（“//*[contains（@href，'finance'）]”）；
线程。sleep（）wait.until（）Thread.sleeps（）