Selenium Java代码打印google搜索的前五个结果

Question

线程“main”org.openqa.selenium.StaleElementReferenceException：过时元素引用：元素未附加到页面文档（会话信息:chrome=83.0.4103.106)有关此错误的文档，请访问:https://www.seleniumhq.org/exceptions/stale_element_reference.html构建信息：版本：“3.141.59”，修订：“E82BE7D358”，时间：“2018-11-14T08:25:53”驱动程序信息：org.openqa.selenium.chromeDriver Capabilities{AcceptinSecrecertsUTHN：VirtualAuthenticators：true}会话ID：f9fd73fa86d306099bad2835337c25c0***元素信息：{using=XPath,value=//H3[@class='LC20LB DKV0MD']}

代码快照

显示第一个页面的结果，但当我单击第二个页面结果时，我得到StaleElementReferenceException

import java.util.List;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;

public class NavigateToGoogle {

    public static void main(String[] args) throws InterruptedException {
        // TODO Auto-generated method stub
        WebDriver driver = new ChromeDriver();
        driver.get("http://www.google.com");
        driver.manage().window().maximize();
        driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS);
        //driver.findElement(By.xpath("//input[@class='gLFyf gsfi'])")).sendKeys("zahid");

        WebElement element=driver.findElement(By.name("q"));
        element.sendKeys("mohammed zahid");
        //element.click();
        Thread.sleep(3000);
        //driver.findElement(By.xpath("(//input[@type='submit'])[3]")).click();
        List<WebElement> button=driver.findElements(By.name("btnK"));
        System.out.println(button.size());
        WebElement submit=driver.findElement(By.name("btnK"));
        submit.submit();

        WebElement matchingRes=driver.findElement(By.xpath("//h3[@class='LC20lb DKV0Md']"));
        List<WebElement> listRes=matchingRes.findElements(By.xpath("//h3[@class='LC20lb DKV0Md']"));
        System.out.println(listRes.size());
        for(WebElement results:listRes) 
        {
            String value = results.getText();
            System.out.println(value);
        }

        driver.findElement(By.xpath("//a[@aria-label='Page 2']")).click();
        WebDriverWait wait = new WebDriverWait(driver, 5);
        wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//h3[@class='LC20lb DKV0Md']")));
        WebElement matchingRes1=driver.findElement(By.xpath("//h3[@class='LC20lb DKV0Md']")); 
        matchingRes1.getSize();
        List<WebElement> listRes1=matchingRes.findElements(By.xpath("//h3[@class='LC20lb DKV0Md']")); 
        System.out.println(listRes1.size());

        for(WebElement results1:listRes1)
        {
            String value = results1.getText();
            System.out.println(value);
        }
    }

}

Answer 1

我们不能硬编码谷歌结果页面元素，因为每个谷歌页面每天都在更新。这里我给出了结果搜索的示例代码，您可以尝试这样做（我打开谷歌页面，键入“测试”并显示所有结果，然后单击列表中的“测试类型”，如果您需要所有结果，您可以打印）

 public static void main(String[] args) throws Exception {
    System.setProperty("webdriver.chrome.driver", "C:\\Users\\User\\Downloads\\Chromedriver\\chromedriver.exe");
    WebDriver driver = new ChromeDriver();
    driver.manage().window().maximize();
    driver.get("https://www.google.com/");
    driver.findElement(By.name("q")).sendKeys("Testing");
    Thread.sleep(Long.parseLong("1000"));
    List<WebElement> LIST = driver.findElements(By.xpath("//ul[@role='listbox']//li/descendant::div[@class='sbl1']"));
    System.out.println(LIST.size());


    for (int i = 0; i < LIST.size(); i++)
    {
        //System.out.println(LIST.get(i).getText());
        if (LIST.get(i).getText().contains("testing types"))
        {
            LIST.get(i).click();
            break;
        }
    }
}

}