WebDriver中使用JQuery选择器

1. 在已加载了JQuery的页面上可以直接使用JQuery选择器

例如www.jquery.com网站，如果我们想定位红框中导航栏中的偶数为就可以使用jquery的伪选择器:even

具体实现如下

    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中调用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();            }        }  

    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()); // 验证超链接的数量                for (int i = 0; i < elements.size(); i++) {                    System.out.print(elements.get(i).getText() + "、");                }                driver.close();            }            private void injectjQueryIfNeeded() {                if (!jQueryLoaded())                    injectjQuery();            }                    // 判断是已加载jQuery            public Boolean jQueryLoaded() {                Boolean loaded;                try {                    loaded = (Boolean) jse.executeScript("return " + "jQuery()!=null");                } catch (WebDriverException e) {                    loaded = false;                }                return loaded;            }                    // 通过注入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);");            }        }