关于弹出新窗口处理

关于新窗口弹出问题，我们往往需要switch方法去切换得到新窗口的值，而如何判断和新窗口对比之后能正确切换，则需要我们用getWindowHandles()方法，然后再foreach它们，具体实现如下：
     String winHandleBefore = driver.getWindowHandle();
      Set<String> handles = driver.getWindowHandles();
      for(String s: handles) 
      {
          if (s.equals(winHandleBefore))
          {           
              continue;
          }
          else
              driver.switchTo().window(s);
             
....
//The operation you want to do in new window
driver.findElement(By.xpath("the xpath you want to click")).click();
....
              sleep(2000);
              driver.close();
        
      }
      //再切换回原窗口，进行下面的操作就可以了
      driver.switchTo().window(winHandleBefore);