#最大化窗口
webDriver.manage().window().fullscreen();
#向前
webDriver.navigate().back();
/**
多个窗口之间切换
*/
Set<String> windowHandles = webDriver.getWindowHandles();
webDriver.switchTo().window(windowHandles.toArray()[0].toString());
/**
悬停
*/
WebElement tj_settingicon = webDriver.findElement(By.id("s-usersetting-top"));
Actions action =new Actions(webDriver);
方式1:action.clickAndHold(tj_settingicon).perform();
方式2:action.moveToElement(tj_settingicon).perform();