selenium java等待alert对话框弹出，并关闭对话框

private void waitForAlertAndCloseAlert(WebDriver driver) throws InterruptedException
{
int i=0;
while(i++<10)
{
try
{
Alert alert = driver.switchTo().alert();
alert.accept();
break;
}
catch(NoAlertPresentException e)
{
Thread.sleep(1000);
continue;
}
}
if(i==9){
throw new NoAlertPresentException();
}
}