selenium执行js

import java.util.ArrayList;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class TestBaidu {

    public static WebDriver driver;

    /*
     * @BeforeClass 
　　　* public void setUp() { driver = new FirefoxDriver();
     * driver.manage().window().maximize(); }
     * 
     * @AfterClass 
　　　* public void tearDown() { driver.close(); driver.quit(); }
     * 
     * @Test 
　　　* public void process() {
     * driver.navigate().to("http://www.baidu.com"); //
     * driver.findElement(By.id("kw")); JavascriptExecutor j =
     * (JavascriptExecutor) driver;
     * j.executeScript("document.getElementById("kw").value="测试""); }
     */

    public static void main(String[] args) throws InterruptedException {
        // 可能需要设置firefox的路径
        driver = new FirefoxDriver();
        try {
            driver.manage().window().maximize();
            driver.get("http://www.baidu.com");
            // 利用webdriver键入搜索关键字
            // driver.findElement(By.id("kw")).sendKeys("yeetrack");
            // 利用js代码键入搜索关键字
            ((JavascriptExecutor) driver)
                    .executeScript("document.getElementById("kw").value="测试"");
            // 利用js代码取出关键字
            String keyword = (String) ((JavascriptExecutor) driver)
                    .executeScript("var input = document.getElementById("kw").value;return input");
            System.out.println(keyword);
            driver.findElement(By.id("su")).click();
            TimeUnit.SECONDS.sleep(5);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            driver.quit();
        }
    }

}