如何使用Selenium和Java从下拉框中获取可用选项？

Question

I'm trying to use Selenium to retrieve all the car makes from the Autotrader website. There is a drop-down box that changes depending on which cars are available for sale at a given time.

I have tried many of the solutions listed on stackoverflow, but my code doesn't return anything.

Any help would be greatly appreciated!

Here is my code...

import java.util.List;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
import org.openqa.selenium.support.ui.Select;


public class AutotraderScraper {

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

        WebDriver driver = new HtmlUnitDriver();

        // Visit autotrader website
        driver.get("http://www.autotrader.co.uk/");

        // Look for car make box
        Select select = new Select(driver.findElement(By.id("searchVehiclesMake")));

        // Get all options
        List<WebElement> allOptions = select.getOptions();

        // Iterate through available options
        java.util.Iterator<WebElement> i = allOptions.iterator();

        // Print options
        while(i.hasNext()) {
            WebElement row = i.next();
            System.out.println("Found an option!");
            System.out.println(row.getText());
        }
    }
}

Answer 1

This is a duplicate id and is being used in two different places of this page.

I suggest you use xpath to find the select element The following xpath can be used

//h1[.='Find new & used cars']/..//*[@id='searchVehiclesMake']

Target element in Find new & used cars section