Selenium 无法选择下拉列表，显示不可见

对于以下代码，无法选择“摊销”下拉列表

   import java.awt.Toolkit;    
    import org.junit.Assert;
    import org.openqa.selenium.By;
    import org.openqa.selenium.Dimension;
    import org.openqa.selenium.JavascriptExecutor;
    import org.openqa.selenium.Keys;
    import org.openqa.selenium.WebDriver;
    import org.openqa.selenium.WebElement;
    import org.openqa.selenium.chrome.ChromeDriver;
    import org.openqa.selenium.chrome.ChromeOptions;
    import org.openqa.selenium.interactions.Actions;
    import org.openqa.selenium.remote.DesiredCapabilities;
    import org.openqa.selenium.support.ui.ExpectedConditions;
    import org.openqa.selenium.support.ui.Select;
    import org.openqa.selenium.support.ui.WebDriverWait;

    public class PracticeTest {
    public static void main(String[] args) throws InterruptedException {
        WebDriver driver;
        WebDriverWait wait;

        System.setProperty("webdriver.chrome.driver", "C:\\Users\\dilu316\\Downloads\\selenium workspace\\chromedriver\\chromedriver.exe");

        //approach 1 - to maximize screen in chrome
        ChromeOptions options = new ChromeOptions();
        options.addArguments("--start-maximized");;
        driver = new ChromeDriver(options);
        wait=new WebDriverWait(driver, 50);

        //if the below method wont work for maximizing screen then above method we can use
        //WebDriver driver = new ChromeDriver();
        //Thread.sleep(5000);
        //driver.manage().window().maximize();

        driver.get("http://ia.ca/");

        //approach 2 - to maximize screen in chrome
        /*Toolkit toolkit = Toolkit.getDefaultToolkit();
        int height = (int)toolkit.getScreenSize().getHeight();
        int width  = (int)toolkit.getScreenSize().getWidth();
        System.out.println(height + "--" + width);

        driver.manage().window().setSize(new Dimension(width, height));*/


        driver.findElement(By.xpath("//*[@id='nav-secondaire']//a[@data-utag-name='loans']")).click();
        driver.findElement(By.xpath("//a[contains(text(),'Mortgages')]")).click();
        //in the upper xpath we can put a ". in place of text()" also

        //method 1 -if element is not clickable
        /*WebDriverWait wait = new WebDriverWait(driver, 100);
        wait.until(ExpectedConditions.elementToBeClickable(By.xpath("//a[contains(.,'Calculate your payments')]")));*/

        JavascriptExecutor js = (JavascriptExecutor) driver;
        js.executeScript("scroll(255, 644)");
        driver.findElement(By.xpath("//a[contains(.,'Calculate your payments')]")).click();

        WebElement priceSlideLocator = driver.findElement(By.xpath("//div[@class='slider-handle min-slider-handle custom']"));
        WebElement slideTrack = driver.findElement(By.xpath("//div[@class='slider-track-high']"));
        Dimension sliderSize = slideTrack.getSize();
        int sliderWidth = sliderSize.getWidth();
        int xCoord = priceSlideLocator.getLocation().getX();
        System.out.println(xCoord);
        System.out.println(sliderWidth);
        Thread.sleep(10);
        Actions builder = new Actions(driver);
        builder.moveToElement(priceSlideLocator)
        .click()
        .dragAndDropBy(priceSlideLocator, xCoord+sliderWidth,0)
        .build()
        .perform();

        WebElement hiddenPriceLocator = driver.findElement(By.xpath("//input[@id='sliderPrixPropriete']"));
        int priceValue = Integer.parseInt(hiddenPriceLocator.getAttribute("value"));
        if(priceValue==2000000){
            System.out.println("price value is 2000000");
        }

        String stylePercent = priceSlideLocator.getAttribute("style");
        if(stylePercent.contains("left: 100%")){
            System.out.println("slide is 100%");
        }

        priceSlideLocator = driver.findElement(By.xpath("//div[@class='slider-handle min-slider-handle custom']"));
        slideTrack = driver.findElement(By.xpath("//div[@class='slider-track-high']"));
        sliderSize = slideTrack.getSize();
        //sliderWidth = sliderSize.getWidth();
        xCoord = priceSlideLocator.getLocation().getX();
        System.out.println(xCoord);
        Thread.sleep(10);
        Actions builder2 = new Actions(driver);
        builder2.moveToElement(priceSlideLocator).click().dragAndDropBy(priceSlideLocator,-(xCoord+sliderWidth),0).build().perform();
        System.out.println("slide BACK%");

        hiddenPriceLocator = driver.findElement(By.xpath("//input[@id='sliderPrixPropriete']"));
        //priceValue = Integer.parseInt(hiddenPriceLocator.getAttribute("value"));
        WebElement plusButton = driver.findElement(By.id("PrixProprietePlus"));
        for(int i=0; i<2;i++){
            plusButton.click();
            priceValue = Integer.parseInt(hiddenPriceLocator.getAttribute("value"));
            if(priceValue==500000){
                System.out.println("purchase price is 500000");
            }

        }

        WebElement downPlusButton = driver.findElement(By.id("MiseDeFondPlus"));
        downPlusButton.click();
        WebElement downHiddenPrice = driver.findElement(By.id("sliderMiseDeFond"));
        String downPrice=downHiddenPrice.getAttribute("value");
        int downPricevalue = Integer.parseInt(downPrice);
        System.out.println("Down payment is " + downPricevalue);

 code to check the visibility   


    if (driver.findElement(By.xpath("//select[@id='Amortissement']")).isDisplayed()) {
            System.out.println("Element is Visible");
        } else {
            System.out.println("Element is InVisible");
        }

        //To check Element Present


if (driver.findElements(By.xpath("//select[@id='Amortissement']")).size() != 0) {
        System.out.println("Element is Present");
    } else {
        System.out.println("Element is Absent");
    }

    //To check Enable
    if (driver.findElement(By.xpath("//select[@id='Amortissement']")).isEnabled()) {
        System.out.println("Element is Enable");
    } else {
        System.out.println("Element is Disabled");
    }
    /*WebElement drpAmortization = wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//select[@id='Amortissement']")));
    Select dropDownAmortization = new Select(drpAmortization);
    dropDownAmortization.selectByVisibleText("20 years");*/

    WebElement drpAmortization = driver.findElement(By.xpath("//select[@id='Amortissement']"));
    JavascriptExecutor executor = (JavascriptExecutor) driver;
    //executor.executeScript("arguments[0].click();", drpAmortization);
    executor.executeScript("window.document.getElementById('Amortissement').click()");
    Select dropDownAmortization = new Select(drpAmortization);
    dropDownAmortization.selectByVisibleText("20 years");

    }


}

导入java.awt.Toolkit；
导入org.junit.Assert；
导入org.openqa.selenium.By；
导入org.openqa.selenium.Dimension；
导入org.openqa.selenium.JavascriptExecutor；
导入org.openqa.selenium.Keys；
导入org.openqa.selenium.WebDriver；
导入org.openqa.selenium.WebElement；
导入org.openqa.selenium.chrome.ChromeDriver；
导入org.openqa.selenium.chrome.ChromeOptions；
导入org.openqa.selenium.interactions.Actions；
导入org.openqa.selenium.remote.DesiredCapabilities；
导入org.openqa.selenium.support.ui.ExpectedConditions；
导入org.openqa.selenium.support.ui.Select；
导入org.openqa.selenium.support.ui.WebDriverWait；
公开课实习测验{
公共静态void main（字符串[]args）引发InterruptedException{
网络驱动程序；
网络驱动程序让它等待；
System.setProperty（“webdriver.chrome.driver”，“C:\\Users\\dilu316\\Downloads\\selenium workspace\\chromedriver\\chromedriver.exe”）；
//方法1-最大化chrome屏幕
ChromeOptions选项=新的ChromeOptions（）；
options.addArguments（“--start maximized”）；；
驱动程序=新的色度驱动程序（可选）；
等待=新的WebDriverWait（驱动程序，50）；
//如果下面的方法不能使屏幕最大化，那么我们可以使用上面的方法
//WebDriver驱动程序=新的ChromeDriver（）；
//睡眠（5000）；
//driver.manage（）.window（）.maximize（）；
驱动程序。获取（“http://ia.ca/");
//方法2-最大化chrome屏幕
/*Toolkit=Toolkit.getDefaultToolkit（）；
int height=（int）toolkit.getScreenSize（）.getHeight（）；
int width=（int）toolkit.getScreenSize（）.getWidth（）；
System.out.println（高度+“--”+宽度）；
driver.manage（）.window（）.setSize（新尺寸（宽度、高度））*/
driver.findElement（By.xpath（“//*[@id='nav-secondaire']///a[@data utag name='loans']））。单击（）；
findElement（By.xpath（“//a[contains（text（），'Mortgages'）]”）。单击（）；
//在上面的xpath中，我们还可以用“.”代替text（）
//方法1-如果元素不可单击
/*WebDriverWait wait=新的WebDriverWait（驱动程序，100）；
wait.until（ExpectedConditions.elementtobelickable（By.xpath（//a[contains（，'Calculate your payments'）]）*/
JavascriptExecutor js=（JavascriptExecutor）驱动程序；
js.executeScript（“滚动（255644）”；
findElement（By.xpath（//a[contains（，'Calculate your payments'）]）））。单击（）；
WebElement pricelidelocator=driver.findelelement（By.xpath（“//div[@class='slider-handle-min-slider-handle-custom']）；
WebElement slideTrack=driver.findElement（By.xpath（“//div[@class='slider-track-high']）；
维度sliderSize=slideTrack.getSize（）；
int sliderWidth=sliderSize.getWidth（）；
int xCoord=pricelidelocator.getLocation（）.getX（）；
System.out.println（xCoord）；
System.out.println（滑块宽度）；
睡眠（10）；
动作生成器=新动作（驱动程序）；
builder.moveToElement（PricelideLocator）
。单击（）
.dragAndDropBy（priceSlideLocator，xCoord+滑块宽度，0）
.build（）
.perform（）；
WebElement hiddenPriceLocator=driver.findElement（By.xpath（//input[@id='sliderPrixPropriete']）；
int priceValue=Integer.parseInt（hiddenPriceLocator.getAttribute（“value”）；
如果（价格值==2000000）{
System.out.println（“价格值为2000000”）；
}
String stylePercent=pricelidelocator.getAttribute（“样式”）；
if（stylePercent.contains（“左：100%”）{
System.out.println（“幻灯片为100%”；
}
pricelidelocator=driver.findelelement（By.xpath（“//div[@class='slider-handle-min slider-handle-custom']）；
slideTrack=driver.findElement（By.xpath（“//div[@class='slider-track-high']）；
sliderSize=slideTrack.getSize（）；
//sliderWidth=sliderSize.getWidth（）；
xCoord=pricelidelocator.getLocation（）.getX（）；
System.out.println（xCoord）；
睡眠（10）；
Actions builder2=新操作（驱动程序）；
builder2.moveToElement（priceSlideLocator）。单击（）.dragAndDropBy（priceSlideLocator，-（xCoord+sliderWidth），0）。构建（）.perform（）；
System.out.println（“向后滑动%”；
hiddenPriceLocator=driver.findElement（By.xpath（//input[@id='sliderPrixPropriete']）；
//priceValue=Integer.parseInt（hiddenPriceLocator.getAttribute（“值”）；
WebElement plusButton=driver.findElement（By.id（“PrixProprietePlus”）；
对于（int i=0；i我已经检查了页面的html代码，下拉列表不是传统的选择下拉列表。它只是一个按钮式的东西。因此方法如下

单击向下箭头按钮：

driver.findElement(By.xpath("//*[@id='form_calculateur_versements']/div[4]//b")).click();


现在，选项将可见

从下拉列表中选择选项：

driver.findElement(By.xpath("//*[@id='form_calculateur_versements']/div[4]//li[2]")).click();


我从上面代码的下拉列表中选择第二个选项

类似的方法适用于页面中的所有下拉列表

希望这对您有所帮助。谢谢。
摊销下拉列表不是标准的选择控件，因此您使用的xpath将不起作用。此外，标准Webdriver API（如selectByVisibleText等）不能用于从此类下拉列表中选择值。但是，您可以编写自己的自定义通用方法来选择值对其进行操作，如下所示：

public static void selectText(String dropDownLabel, String value) {
  String showOptions = "//label[normalize-space(text())='" + dropDownLabel + "']/following::b[1]";

  driver.findElement(By.xpath(showOptions)).click();
  WebDriverWait wait = new WebDriverWait(driver, 10);
  String option = "//label[normalize-space(text())='" + dropDownLabel + "']/following::li[normalize-space(text())='"
          + value + "']";
  wait.until(ExpectedConditions.visibilityOf(driver.findElement(By.xpath(option))));

  driver.findElement(By.xpath(option)).click();
}

在上面的代码中，单击下拉列表后，Webdriver将等待下拉选项出现，然后单击所需选项。如果您有进一步的疑问，请告诉我。
以下是您问题的答案：

关于解决方案的几句话：

在没有预期条件的情况下诱导
ExplicitWait
，违背了在
wa中保护自己的目的
import java.util.List;

import org.openqa.selenium.By;
import org.openqa.selenium.Dimension;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.interactions.Actions;

public class Q44226865_select_dropdown_list 
{

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


    WebDriver driver;
    String innerhtml = null;
    System.setProperty("webdriver.chrome.driver", "C:\\Utility\\BrowserDrivers\\chromedriver.exe");

    //approach 1 - to maximize screen in chrome
    ChromeOptions options = new ChromeOptions();
    options.addArguments("--start-maximized");
    driver = new ChromeDriver(options);
    driver.get("http://ia.ca/");
    driver.findElement(By.xpath("//*[@id='nav-secondaire']//a[@data-utag-name='loans']")).click();

    driver.findElement(By.xpath("//a[contains(text(),'Mortgages')]")).click();
    JavascriptExecutor js = (JavascriptExecutor) driver;
    js.executeScript("scroll(255, 644)");
    driver.findElement(By.xpath("//a[contains(.,'Calculate your payments')]")).click();

    WebElement priceSlideLocator = driver.findElement(By.xpath("//div[@class='slider-handle min-slider-handle custom']"));
    WebElement slideTrack = driver.findElement(By.xpath("//div[@class='slider-track-high']"));
    Dimension sliderSize = slideTrack.getSize();
    int sliderWidth = sliderSize.getWidth();
    int xCoord = priceSlideLocator.getLocation().getX();
    System.out.println(xCoord);
    System.out.println(sliderWidth);
    Thread.sleep(10);

    Actions builder = new Actions(driver);
    builder.moveToElement(priceSlideLocator)
    .click()
    .dragAndDropBy(priceSlideLocator, xCoord+sliderWidth,0)
    .build()
    .perform();

    WebElement hiddenPriceLocator = driver.findElement(By.xpath("//input[@id='sliderPrixPropriete']"));
    int priceValue = Integer.parseInt(hiddenPriceLocator.getAttribute("value"));
    if(priceValue==2000000){
        System.out.println("price value is 2000000");
    }

    String stylePercent = priceSlideLocator.getAttribute("style");
    if(stylePercent.contains("left: 100%")){
        System.out.println("slide is 100%");
    }

    priceSlideLocator = driver.findElement(By.xpath("//div[@class='slider-handle min-slider-handle custom']"));
    slideTrack = driver.findElement(By.xpath("//div[@class='slider-track-high']"));
    sliderSize = slideTrack.getSize();
    //sliderWidth = sliderSize.getWidth();
    xCoord = priceSlideLocator.getLocation().getX();
    System.out.println(xCoord);
    Thread.sleep(10);
    Actions builder2 = new Actions(driver);
    builder2.moveToElement(priceSlideLocator).click().dragAndDropBy(priceSlideLocator,-(xCoord+sliderWidth),0).build().perform();
    System.out.println("slide BACK%");

    hiddenPriceLocator = driver.findElement(By.xpath("//input[@id='sliderPrixPropriete']"));
    //priceValue = Integer.parseInt(hiddenPriceLocator.getAttribute("value"));
    WebElement plusButton = driver.findElement(By.id("PrixProprietePlus"));
    for(int i=0; i<2;i++){
        plusButton.click();
        priceValue = Integer.parseInt(hiddenPriceLocator.getAttribute("value"));
        if(priceValue==500000){
            System.out.println("purchase price is 500000");
        }

    }

    WebElement downPlusButton = driver.findElement(By.id("MiseDeFondPlus"));
    downPlusButton.click();
    WebElement downHiddenPrice = driver.findElement(By.id("sliderMiseDeFond"));
    String downPrice=downHiddenPrice.getAttribute("value");
    int downPricevalue = Integer.parseInt(downPrice);
    System.out.println("Down payment is " + downPricevalue);

    if (driver.findElement(By.xpath("//select[@id='Amortissement']")).isDisplayed()) {
        System.out.println("Element is Visible");
    } else {
        System.out.println("Element is InVisible");
    }

    //To check Element Present


    if (driver.findElements(By.xpath("//select[@id='Amortissement']")).size() != 0) {
        System.out.println("Element is Present");
    } else {
    System.out.println("Element is Absent");
    }

    //To check Enable
    if (driver.findElement(By.xpath("//select[@id='Amortissement']")).isEnabled()) {
        System.out.println("Element is Enable");
    } else {
        System.out.println("Element is Disabled");
    }

    WebElement drpAmortization = driver.findElement(By.xpath("//form[@id='form_calculateur_versements']/div[4]/div/div/div[2]/b"));
    drpAmortization.click();
    List <WebElement> drpAmortization_list = driver.findElements(By.xpath("//form[@id='form_calculateur_versements']//div[@class='selectric-scroll']/ul/li"));
    System.out.println("Number of Elements : "+drpAmortization_list.size());

    for (int i=0; i<drpAmortization_list.size(); i++)
    {
        WebElement my_element = drpAmortization_list.get(i);
        innerhtml = my_element.getAttribute("innerHTML");

        if(innerhtml.contains("20 years"))
        {
            Thread.sleep(3000);
            my_element.click();
            break;
        }
    }
    System.out.println("Value selected from Dropdown is : "+innerhtml);
  }

}