使用Selenium和Java实现自动化，如何使脚本的面向对象部分“可操作”？

// 基础类
public class BasePage {
    protected WebDriver driver;

    public BasePage(WebDriver driver) {
        this.driver = driver;
    }

    // 共同的方法
    public void clickElement(By locator) {
        driver.findElement(locator).click();
    }

    public void enterText(By locator, String text) {
        driver.findElement(locator).sendKeys(text);
    }
}

// 页面对象类
public class LoginPage extends BasePage {
    private By usernameField = By.id("username");
    private By passwordField = By.id("password");
    private By loginButton = By.id("loginButton");

    public LoginPage(WebDriver driver) {
        super(driver);
    }

    // 页面特定的方法
    public HomePage login(String username, String password) {
        enterText(usernameField, username);
        enterText(passwordField, password);
        clickElement(loginButton);
        return new HomePage(driver);
    }
}

// 脚本主要部分
public class AutomationScript {
    public static void main(String[] args) {
        WebDriver driver = new ChromeDriver();
        driver.get("https://example.com");

        LoginPage loginPage = new LoginPage(driver);
        HomePage homePage = loginPage.login("username", "password");

        // 在首页执行其他操作
        // ...
    }
}