使用 WebDriver 的 Select 类来选择下拉列表中的值。

selectByValue 语法

Select selectByValue = new Select(driver.findElement(By.id("SelectID_One")));  
selectByValue.selectByValue("greenvalue");

selectByVisibleText 语法

Select selectByVisibleText = new Select (driver.findElement(By.id("SelectID_Two")));  
selectByVisibleText.selectByVisibleText("Lime");  

Select selectByIndex = new Select(driver.findElement(By.id("SelectID_Three")));  
selectByIndex.selectByIndex(2);