Question

我正在尝试使用Selenium Webdriver从本地存储中获取项目。

我关注this site但是当我运行代码时，我得到了NullPointerException。

当我调试代码时，我看到函数：getItemFromLocalStorage由于某种原因返回NULL。

这是我的代码：

public class storage
 {
    public static WebDriver driver;
    public static JavascriptExecutor js;

    public static void main(String[] args)
    {       
        System.setProperty("webdriver.chrome.driver", "D://chromedriver.exe");
        driver = new ChromeDriver();
        driver.get("http://html5demos.com/storage");
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        driver.findElement(By.id("local")).sendKeys("myLocal");
        driver.findElement(By.id("session")).sendKeys("mySession");
        driver.findElement(By.tagName("code")).click(); // just to escape textbox

        String sItem = getItemFromLocalStorage("value");
        System.out.println(sItem);
    }

    public static String getItemFromLocalStorage(String key)
    {
        return (String) js.executeScript(String.format(
            "return window.localStorage.getItem('%s');", key));
    }
}

Answer 1

那是因为你忘了正确地实例化js个对象。在driver = new ChromeDriver();之后添加以下行。

js = ((JavascriptExecutor)driver);

它会起作用。

Answer 2

我假设你的驱动程序实例上有NPE。您可以在创建驱动程序实例时设置驱动程序位置属性：

final ChromeDriverService chromeDriverService = new ChromeDriverService.Builder()
        .usingDriverExecutable(new File("D://chromedriver.exe")).build();

driver = new ChromeDriver(chromeDriverService);

BTW，我使用了硒2.44.0

Answer 3

使用此代码

        WebStorage webStorage = (WebStorage) new Augmenter().augment(driver);
        LocalStorage localStorage = webStorage.getLocalStorage();

        String user_data_remember = localStorage.getItem("user_data_remember");
        String emailAfterLogout;
        String passwordAfterLogout;

        if (!user_data_remember.equals("")) {

            JSONObject jsonObject = new JSONObject(user_data_remember);

            Boolean remember = jsonObject.getBoolean("remember");

            if (remember) {
                emailAfterLogout = jsonObject.getString("email");
                passwordAfterLogout = jsonObject.getString("password");

                if (emailAfterLogout.equals(email) && passwordAfterLogout.equals(password)) {
                    System.out.println("Remember me is working properly.");
                } else {
                    System.out.println("Remember me is not working.");
                }
            }
        } else {
            System.out.println("Remember me checkbox is not clicked.");
        }

Webdriver从本地存储获取项目

3 个答案: