1 定义isAlertPresent()供调用；

public  boolean isAlertPresent() {

  try {

   driver.switchTo().alert();

   return true;

  } catch (NoAlertPresentException Ex) {

   return false;

  }

 }

2 处理弹出的alert;

while (new Sgzzsjps_Action(driver).isAlertPresent()){ 

            driver.switchTo().alert().accept(); 

           Thread.sleep(3000);

           }