如何使用Selenium WebDriver导航并单击网页上的按钮？

Question

我有一个使用Selenium浏览“SEARCH”按钮的问题。我需要点击“搜索”按钮，然后回到初始页面并再次点击它。我的代码导航这个按钮，并点击它非常好第一次，然后网页回到初始URL。然后，它应该再次导航相同的按钮，但是，它不工作......我使用了许多不同的方式（xpath等）这里有什么问题？这是我的完整代码。你可以复制粘贴到日食，看看我在说什么：

 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; 

    public class Search { 

public static void main(String[] args) throws InterruptedException { 

    System.setProperty("webdriver.chrome.driver", 
      "chromedriver\\chromedriver.exe"); 
    WebDriver driver = new ChromeDriver(); 
    driver.manage().timeouts().implicitlyWait(100, TimeUnit.SECONDS); 

    // Getting the initial page 
    driver.get("http://pqasb.pqarchiver.com/chicagotribune/advancedsearch.html"); 
    driver.findElement(By.xpath("//input[@value='historic']")).click(); 
    WebElement element = driver.findElement(By.name("QryTxt")); 
    element.sendKeys("issue"); 
    driver.findElement(
      By.xpath("//input[@value='Search'][@onclick='return checkinput(this.form, 0);'][@type='button']")) 
      .click(); 

    // Getting back to the initial page 
    driver.get("http://pqasb.pqarchiver.com/chicagotribune/advancedsearch.html"); 
    driver.findElement(
      By.xpath("//input[@value='Search'][@onclick='return checkinput(this.form, 0);'][@type='button']")) 
      .click(); 
    /** 
    * This command does not execute. It is supposed to click on the button 
    * "SEARCH" It worked well in the above identical code line, however now 
    * it just does not recognize the existence of this button How can I 
    * overcome this issue? I tried navigating this button by all different 
    * means (xpath etc...) 
    */ 
} 

    } 

Answer 1

任何异常？重定向后DOM是否改变了？您正在使用哪个浏览器？

我注意到在再次转到url之后，按钮变成了<input type="button" onclick="return checkinput(this.form, 1);" value="Search"/>。

，所以你需要 driver.findElement( By.xpath("//input[@value='Search'][@onclick='return checkinput(this.form, 1);'][@type='button']")).click();