使用actions对象，您应首先移动菜单标题，然后移动到弹出菜单项并单击它。不要忘记最后调用 actions.perform（）。以下是一些示例Java代码：

With the actions object you should first move the menu title, and then move to the popup menu item and click it. Don't forget to call actions.perform() at the end. Here's some sample Java code:

Actions actions = new Actions(driver);
WebElement menuHoverLink = driver.findElement(By.linkText("Menu heading"));
actions.moveToElement(menuHoverLink);

WebElement subLink = driver.findElement(By.cssSelector("#headerMenu .subLink"));
actions.moveToElement(subLink);
actions.click();
actions.perform();