WebDriver 加載Jquery

package com.example.tests; 
import static org.junit.Assert.*; 
import java.util.*; 
import org.junit.*; 
import org.openqa.selenium.*; 
import org.openqa.selenium.ie.InternetExplorerDriver; 
   
public class test { 
    WebDriver driver = new InternetExplorerDriver(); 
    JavascriptExecutor jse = (JavascriptExecutor)driver; 
    @Test 
    public void jQueryTest() {  
        driver.get("http://www.jquery.com/"); 
            //在executeScript中調用jQuery.find(jquerySelector); 
             List<WebElement> elements =  
                     (List<WebElement>)jse.executeScript("return jQuery.find" +"('.menu-item a:even')");    
             assertEquals(3,elements.size()); 
             assertEquals("Download",elements.get(0).getText());    
             assertEquals("Blog",elements.get(1).getText());  
             assertEquals("Browser Support",elements.get(2).getText());  
            driver.close(); 
    } 
}
2. 另一種情況就是頁面沒有另載jQuery，我們需要先 判斷再自已手動注入，以百度爲例，百度首頁是沒有加載的
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package com.example.tests; 
   
import static org.junit.Assert.*; 
import java.util.*; 
import org.junit.*; 
import org.openqa.selenium.*; 
import org.openqa.selenium.ie.InternetExplorerDriver; 
   
public class Selenium2{ 
    WebDriver driver = new InternetExplorerDriver(); 
    JavascriptExecutor jse = (JavascriptExecutor) driver; 
   
    @Test 
    public void jQueryTest() { 
        driver.get("http://www.baidu.com/"); 
        injectjQueryIfNeeded(); 
        List<WebElement> elements = (List<WebElement>) jse 
                .executeScript("return jQuery.find('#nv a')"); 
        assertEquals(7, elements.size()); // 驗證超鏈接的數量 
        for (int i = 0; i < elements.size(); i++) { 
            System.out.print(elements.get(i).getText() + "、"); 
        } 
        driver.close(); 
    } 
    private void injectjQueryIfNeeded() { 
        if (!jQueryLoaded()) 
            injectjQuery(); 
    } 
   
    // 判斷是已加載jQuery 
    public Boolean jQueryLoaded() { 
        Boolean loaded; 
        try { 
            loaded = (Boolean) jse.executeScript("return " + "jQuery()!=null"); 
        } catch (WebDriverException e) { 
            loaded = false; 
        } 
        return loaded; 
    } 
   
    // 通過注入jQuery 
    public void injectjQuery() { 
        jse.executeScript(" var headID = " 
                + "document.getElementsByTagName(\"head\")[0];" 
                + "var newScript = document.createElement('script');" 
                + "newScript.type = 'text/javascript';" + "newScript.src = " 
                + "'http://ajax.googleapis.com/ajax/" 
                + "libs/jquery/1.7.2/jquery.min.js';" 
                + "headID.appendChild(newScript);"); 
    } 
}