好的，所以我知道关于webdriver警报的问题还有很多其他答案，我已经仔细研究了它们，但是我认为我的情况有所不同。当我单击“提交”按钮时，我已经切换到3帧，然后收到警报，因此我尝试切换回默认内容，然后使用try
catch和alert.accept单击警报，但仍然没有单击警报。代码如下。提前感谢你的帮助 ：）

public class BookAHoliday {

    public FirstPage completeHolidayFormAndSubmit(String firstDate, String lastDate) {

        sleepsAreBad();
        driver.switchTo().frame("ContainerFrame");
        driver.switchTo().frame("iframeCommunityContainer");
        driver.switchTo().frame("FORMCONTAINER");
        fluentWait(By.id("StartDate_txtInput"));
        firstDayOfLeaveInput.sendKeys(firstDate);
        sleepsAreBad();
        lastDayofLeaveInput.sendKeys(lastDate);

        try {
            submitButton.click();
        } catch (UnhandledAlertException f) {
            try {
                sleepsAreBad();
                driver.switchTo().defaultContent();
                Alert alert = driver.switchTo().alert();
                String alertText = alert.getText();
                System.out.println("Alert data: " + alertText);
                alert.accept();
            } catch (NoAlertPresentException e) {
                e.printStackTrace();
            }
        }
        sleepsAreBad();

        return PageFactory.initElements(driver, FirstPage.class);
    }


    private void sleepsAreBad() {
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }


public class BaseTest {


    public static WebDriver driver;
    static String driverPath = "C:\\";

    @BeforeClass
    public static void setUp() {
        System.out.println("****************");
        System.out.println("launching Browser");
        System.out.println("****************");
        // Browser selection

        //Firefox

        DesiredCapabilities dc = new DesiredCapabilities();
        dc.setCapability(CapabilityType.UNEXPECTED_ALERT_BEHAVIOUR, UnexpectedAlertBehaviour.IGNORE);
        driver = new FirefoxDriver(dc);

driver.get(URL);

 @AfterClass()
    public static void tearDown() {
        if (driver != null) {
            System.out.println("Closing browser");
            driver.quit();
        }

    }


public class Bookings extends BaseTest{

    @Test(description = "Holiday booking")
    public void CD01() {

        FirstPage firstPage = PageFactory.initElements(driver, FirstPage.class);
        firstPage


                 .logIn("username", "password")
                .clickHolidayLink()
                .completeHolidayFormAndSubmit("12/05/2016", "15/05/2016");



    }

警报框这是警报框