java - 为什么 xpath 什么都不做？

Question

source code of login bar

    BasicConfigurator.configure();
    System.setProperty("webdriver.chrome.driver","C:\\Users\\Piotrek\\projekciki\\src\\main\\java\\selenium\\chromedriver.exe");
    WebDriver driver = new ChromeDriver();
    driver.get("https://twitter.com/login?lang=pl");
    WebElement element = driver.findElement(By.xpath("/html/body/div/div/div/div[2]/main/div/div/form/div/div[1]/label/div/div[2]/div/input"));
    element.sendKeys("LOGIN");

只是打开推特，什么也不做。问题出在哪里？

Answer 1

修改后的代码

BasicConfigurator.configure();   System.setProperty("webdriver.chrome.driver","C:\\Users\\Piotrek\\projekciki\\src\\main\\java\\selenium\\chromedriver.exe");
    WebDriver driver = new ChromeDriver();
    driver.navigate("https://twitter.com/login?lang=pl");
    WebDriverWait wait = new WebDriverWait(driver, 10);   
 wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//input[contains(@name,'username_or_email')]")));
        WebElement element = driver.findElement(By.xpath("//input[contains(@name,'username_or_email')]"));
        element.sendKeys("LOGIN");

如果上面的 xpath 不起作用，请使用这个 -//input[contains(@name,'username_or_email' )and (@type='text')]