有时候我们会碰到<select></select>标签的下拉框。直接点击下拉框中的选项不一定可行。Selenium专门提供了Select类来处理下拉框。

         
          
       
        未审核    
        
         初审通过    
         
          复审通过    
          
           审核不通过
          
         
        
       
      
     

 

 

Python                                             

　　先以python为例，查看Selenium代码select.py文件的实现：

　　...\selenium\webdriver\support\select.py 

class Select:    def __init__(self, webelement):        """        Constructor. A check is made that the given element is, indeed, a SELECT tag. If it is not,        then an UnexpectedTagNameException is thrown.        :Args:         - webelement - element SELECT element to wrap                Example:            from selenium.webdriver.support.ui import Select \n            Select(driver.find_element_by_tag_name("select")).select_by_index(2)        """        if webelement.tag_name.lower() != "select":            raise UnexpectedTagNameException(                "Select only works on  elements, not on <%s>" %                 webelement.tag_name)        self._el = webelement        multi = self._el.get_attribute("multiple")        self.is_multiple = multi and multi != "false"

　　查看Select类的实现需要一个元素的定位。并且Example中给了例句。

　　Select(driver.find_element_by_tag_name("select")).select_by_index(2)

def select_by_index(self, index):        """Select the option at the given index. This is done by examing the "index" attribute of an           element, and not merely by counting.           :Args:            - index - The option at this index will be selected            """        match = str(index)        matched = False        for opt in self.options:            if opt.get_attribute("index") == match:                self._setSelected(opt)                if not self.is_multiple:                    return                matched = True        if not matched:            raise NoSuchElementException("Could not locate element with index %d" % index)

　　继续查看select_by_index() 方法的使用并符合上面的给出的下拉框的要求，因为它要求下拉框的选项必须要有index属性，例如index=”1”。

 

def select_by_value(self, value):        """Select all options that have a value matching the argument. That is, when given "foo" this           would select an option like:           Bar           :Args:            - value - The value to match against           """        css = "option[value =%s]" % self._escapeString(value)        opts = self._el.find_elements(By.CSS_SELECTOR, css)        matched = False        for opt in opts:            self._setSelected(opt)            if not self.is_multiple:                return            matched = True        if not matched:            raise NoSuchElementException("Cannot locate option with value: %s" % value)

　　继续查看select_by_value() 方法符合我们的需求，它用于选取<option>标签的value值。最终，可以通过下面有实现选择下拉框的选项。

from selenium.webdriver.support.select import Select……sel = driver.find_element_by_xpath("//select[@id='status']")Select(sel).select_by_value('0')  #未审核Select(sel).select_by_value('1')  #初审通过Select(sel).select_by_value('2')  #复审通过Select(sel).select_by_value('3')  #审核不通过

 

 

 

Java                                                     

 　　当然，在java中的用法也类似，唯一不区别在语法层面有。

package com.jase.base;import org.openqa.selenium.WebDriver;import org.openqa.selenium.By.ById;import org.openqa.selenium.chrome.ChromeDriver;import org.openqa.selenium.support.ui.Select;public class SelectTest {    public static void main(String[] args){                WebDriver driver = new  ChromeDriver();        driver.get("http://www.you_url.com");                // ……                Select sel = new Select(driver.findElement(ById.xpath("//select[@id='status']")));        sel.selectByValue("0"); //未审核        sel.selectByValue("1"); //初审通过        sel.selectByValue("2"); //复审通过        sel.selectByValue("3"); //审核不通过    }}