java - 如何解决 org.openqa.selenium.NoSuchElementException

Question

我正在尝试运行这个程序:

import org.openqa.selenium.By;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;

public class HtmlDriver {
  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();

      // And now use this to visit Google
      driver.get("http://www.stumbleupon.com/home/");

      // Find the text input element by its name
     WebElement element = driver.findElement(By.name("q"));

      // Enter something to search for
      element.sendKeys("Cheese!");

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

      // Check the title of the page
      System.out.println("Page title is: " + driver.getPageSource());
 }
}

我收到以下异常:

Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to locate element with name: q System info: os.name: 'Linux', os.arch: 'i386', os.version: '2.6.27-7-generic', java.version: '1.6.0_12' Driver info: driver.version: HtmlDriver at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElementByName(HtmlUnitDriver.java:651) at org.openqa.selenium.By$4.findElement(By.java:148) at org.openqa.selenium.htmlunit.HtmlUnitDriver$4.call(HtmlUnitDriver.java:1133) at org.openqa.selenium.htmlunit.HtmlUnitDriver$4.call(HtmlUnitDriver.java:1) at org.openqa.selenium.htmlunit.HtmlUnitDriver.implicitlyWaitFor(HtmlUnitDriver.java:869) at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:1130) at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:330) at com.webdrivertest.HtmlDriver.main(HtmlDriver.java:20)

请帮我解决一下。

Answer 1

该页面上没有 name="q"的元素，因此出现 NoSuchElementException。您从 google 获取示例并更改了它要访问的站点，但它仍在页面上寻找 google 搜索框。