Selenium 简明教程

package org.example;

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.Select;
import java.util.List;
import java.util.concurrent.TimeUnit;

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

      // Initiate the Webdriver
      WebDriver driver = new ChromeDriver();

      // adding implicit wait of 15 secs
      driver.manage().timeouts().implicitlyWait(15, TimeUnit.SECONDS);

      // Opening the webpage where we will get dropdown
      driver.get("https://www.tutorialspoint.com/selenium/practice/select-menu.php");

      // identify multiple dropdown
      WebElement dropdown = driver.findElement(By.xpath("//*[@id='demo-multiple-select']"));

      // object of Select class
      Select select = new Select(dropdown);

      // gets options of dropdown in list
      List<WebElement> options = select.getOptions();
      for (WebElement opt : options){
         System.out.println("Options are: " + opt.getText());
      }

      // return true if multi-select dropdown
      Boolean b = select.isMultiple();
      System.out.println("Boolean value for multiple dropdown: "+ b);

      // select item by visible text
      select.selectByVisibleText("Books");

      // select item by value
      select.selectByValue("2");

      // select item by index
      select.selectByIndex(2);

      // get all selected options of dropdown in list
      List<WebElement> selectedOptions = select.getAllSelectedOptions();
      for (WebElement opt : selectedOptions){
         System.out.println("Selected Options are: " + opt.getText());
      }

      // get first selected option in dropdown
      WebElement f = select.getFirstSelectedOption();
      System.out.println("First selected option is: "+ f.getText());

      // deselect option by index
      select.deselectByIndex(2);

      // get all selected options of dropdown after deselecting 1
      List<WebElement> deletedOptions = select.getAllSelectedOptions();
      System.out.println("No. options selected after deselecting one option: " + deletedOptions.size());

      // deselect all selected items
      select.deselectAll();

      // get all selected options of dropdown after deselected
      List<WebElement> deletedAllOptions = select.getAllSelectedOptions();
      System.out.println("No. options selected after deselecting all: " + deletedAllOptions.size());

      // Closing browser
      driver.quit();
   }
}

Options are: Books
Options are: Movies, Music & Games
Options are: Electronics & Computers
Options are: Home, Garden & Tools
Options are: Health & Beauty
Options are: Toys, Kids & Baby
Options are: Clothing & Jewelry
Options are: Sports & Outdoors
Boolean value for multiple dropdown: true
Selected Options are: Books
Selected Options are: Movies, Music & Games
Selected Options are: Electronics & Computers
First selected option is: Books
No. options selected after deselecting one option: 2
No. options selected after deselecting all: 0

Process finished with exit code 0