java - 显式等待无法正常工作，即使加载了元素，仍然需要大量时间才能继续执行

Question

我的代码

/**
         * This method will explicit wait for an element to be visible.
         * @param element
         *            element
         * @param timeOut
         *            timeout in seconds
         */
        @Override
        public void explicitWaitForElement(String element, int timeOut) {
            try {
                LOGGER.debug("In explicitWaitForElement Finction");
                String locator = getConstantValue(element);
                LOGGER.debug("locator constant Value : " , locator);
                setWait(getWebDriver(), timeOut);
                getWait().until(
                        ExpectedConditions.visibilityOfElementLocated(By
                                .xpath(locator)));
            } catch (Exception e) {
                LOGGER.error(
                        "Within explicitWaitForElement - Element not found until timeout:",
                        e);
            }
        }

/**
 * This method will explicit wait for an element to be visible.
 * 
 * @param element
 *            element
 * @param timeOut
 *            timeout in seconds
 */
@Override
public void explicitWaitForEleDisappers(String element, int timeOut) {
    try {
        LOGGER.debug("In explicitWaitForEleDisappers Finction");
        String locator = getConstantValue(element);
        LOGGER.debug("locator constant Value : " , locator);
        setWait(getWebDriver(), timeOut);
        getWait().until(
                ExpectedConditions.invisibilityOfElementLocated(By
                        .xpath(locator)));
    } catch (Exception e) {
        LOGGER.error(
                "Within explicitWaitForElement - Element not found until timeout:",
                e);
    }
}

和Setter用于等待:

 /**
 * Setter for wait.
 * 
 * @param timeOut timeout
 * @param wd webDriver
 */ 
public void setWait(WebDriver wd, int timeOut) {
    this.wait = new WebDriverWait(wd, timeOut);
    this.wait.ignoring(StaleElementReferenceException.class, WebDriverException.class);
}

• 等待。
  • • @return 等待值*/公共(public) WebDriverWait getWait() {返回等待；}

Answer 1

selenium中有WebDriverWait功能，可以设置显式等待。您正在使用 selenium webdriver，那么最好使用 WebDriverWait 来等待元素。按照下面的代码操作

protected WebElement waitForPresent(final String locator, long timeout) {
    WebDriverWait wait = new WebDriverWait(driver, timeout);
    WebElement ele = null;
    try {
        ele = wait.until(ExpectedConditions
                .presenceOfElementLocated(locator));
    } catch (Exception e) {
            throw e;
    }
    return ele;
}

protected WebElement waitForNotPresent(final String locator, long timeout) {
    timeout = timeout * 1000;
    long startTime = System.currentTimeMillis();
    WebElement ele = null;
    while ((System.currentTimeMillis() - startTime) < timeout) {
        try {
            ele = findElement(locator);
            Thread.sleep(1000);
        } catch (Exception e) {
            break;
        }
    }
    return ele;
}