选择器

By ID

页面：

<input type="text" name="passwd" id="passwd-id" />

代码：

WebElement element = driver.findElement(By.id("passwd-id"));

By Name

页面同上

代码：

WebElement e = dr.findElement(By.name("passport_51_user"));

By XPATH

WebElement element 
  = driver.findElement(By.xpath("//input[@id='passwd-id']"));

By Class Name

页面：

<div class="cheese">
  <span>Cheddar</span>
</div>
<divclass="cheese">
  <span>Gouda</span>
</div>

代码：

List<WebElement> cheeses 
  = driver.findElements(By.className("cheese"));

By Link Text

页面：

<a href="http://www.google.com/search?q=cheese">cheese</a>

代码：

WebElement cheese = driver.findElement(By.linkText("cheese"));