Java Selenium通过xpath查找元素

我正在尝试使用selenium登录

<form id="main-login-form" class="login-form form-container">
<input       name="username" id="username-input" placeholder="Username"   class="form-input"    autofocus="">

导入org.openqa.selenium.*； 导入org.openqa.selenium.htmlunit.HtmlUnitDriver

公共类表 {

我一直在犯这个错误

 Exception in thread "main" org.openqa.selenium.NoSuchElementException:
 Unable to locate a node using //input[@id='username-input']
 For documentation on this error, please visit:      
 http://seleniumhq.org/exceptions/no_such_element.html
 Build info: version: '2.48.2', revision: '41bccdd', time: '2015-10-09 19:59:12'

你做得对！

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点击URL后，请等待它加载所有元素，以便您的web元素显示在页面上。

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驱动程序.get（“”）之后的任何等待条件；工作正常。

是

中的元素吗？不，它是一个“”和一个“”。例如，您可以将驱动程序更改为FirefoxDriver，看看问题是否仍然存在吗？相同的事情@drets。仍然会出现相同的错误。请注意！它会将FireFox打开到默认页面。然后“无法连接到端口7055上的主机127.0.0.1”我想我需要tch selenium上的更多youtube。它不喜欢第17行。

driver=webdriver.Remote（DesiredCapabilities.chrome（））；

说

webdriver

无法解决。您是在Java绑定上编写的，我的答案是用python编写的。我刚刚向您展示了使用xpath查找元素没有问题。

public static void main(String[] args) {
    // Create a new instance of the html unit driver
    // Notice that the remainder of the code relies on the interface, 
    // not the implementation.
    WebDriver driver = new HtmlUnitDriver();
     driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

    // And now use this to visit Google
    driver.get("https://focus.nassau.k12.fl.us/focus/");


    // Find the text input element by its name
    WebElement element = driver.findElement(By.xpath("//input[@id='username-input']"));
    element.sendKeys("mcdonaldje");



    System.out.println(driver.getCurrentUrl());

    // Now submit the form. WebDriver will find the form for us from the element


    driver.quit();
}

 Exception in thread "main" org.openqa.selenium.NoSuchElementException:
 Unable to locate a node using //input[@id='username-input']
 For documentation on this error, please visit:      
 http://seleniumhq.org/exceptions/no_such_element.html
 Build info: version: '2.48.2', revision: '41bccdd', time: '2015-10-09 19:59:12'

In [16]: from selenium import webdriver

In [17]: driver = webdriver.Remote(desired_capabilities=webdriver.DesiredCapabilities.HTMLUNIT)

In [18]: driver.get("https://focus.nassau.k12.fl.us/focus/");

In [19]: el = driver.find_element_by_xpath("//input[@id='username-input']")

In [20]: el.send_keys("mcdonaldje")

In [21]: driver.current_url
Out[21]: u'https://focus.nassau.k12.fl.us/focus/'