StaleElementReferenceException：过时的元素引用：

Question

{
"folderType": 3,
            "createdDate": "02.09.2014 11:57:28.UTC",
            "modifiedDate": "02.09.2014 11:57:28.UTC",
            "folderName": "Enterprise",
            "folderId": "baebc0fb-38cb-4300-9bd1-9b98fa622e4a",
            "widgetType": null,
            "enterpriseId": "366fc1f1-670d-41bc-905e-bc80accd2537",
            "parentFolderId": "",
}
{
"folderType": 3,
            "createdDate": "02.09.2014 11:57:28.UTC",
            "modifiedDate": "02.09.2014 11:57:28.UTC",
            "folderName": "Enter",
            "folderId": "6671ca49-9637-488e-9a0e-f7dbf415a542",
            "widgetType": null,
            "enterpriseId": "366fc1f1-670d-41bc-905e-bc80accd2537",
            "parentFolderId": "",
}

我需要访问'Enterprise'和'Enter'文件夹的folderId。

这是我的代码：

字符串S1=driver.findElement（By.xpath（“//SPAN[.='\”Enterprise\“']/祖先：：pre/follows-sibling::pre[1]/SPAN[2]”））.getText（）；

String s2=driver.findElement(By.xpath("//span[. = '\"Enter\"']/ancestor::pre/following-sibling::pre[1]/span[2]")).getText();

我想打印字符串s1和s2的值，而不带COTES。我可以访问'Enterprise'文件夹ID，但无法访问'Enter'文件夹ID。因为“Enter”folderId是新创建的文件夹。

对于出现在cotes之间的每个字段,下面是FORAMT HTML的一般代码：

<pre>            <span class="cm-string">"folderName"</span>: <span class="cm-string">"Enter"</span>,</pre>
<pre>            <span class="cm-string">"folderId"</span>: <span class="cm-string">"6671ca49-9637-488e-9a0e-f7dbf415a542"</span>,</pre>

我可以使用chrome Developer工具选择Enter folderId,如下所示：

$x("//span[. = '\"Enter\"']/ancestor::pre/following-sibling::pre[1]/span[2]")
[<span class=​"cm-string">​"6671ca49-9637-488e-9a0e-f7dbf415a542"​</span>​]

Eclipse中的实际输出：线程“main”org.openqa.selenium.StaleElementReferenceException：stale元素引用：元素未附加到页面文档（会话信息:chrome=37.0.2062.124)

Answer 1

StaleElementReferenceException是由于findElement()方法访问的元素不可用。

使用以下示例代码等待元素的可见性：

private static WebElement findElement(WebDriver driver, By locator) {
    Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
            .withTimeout(90, TimeUnit.SECONDS)
            .pollingEvery(5, TimeUnit.SECONDS)
            .ignoring(NoSuchElementException.class, StaleElementReferenceException.class);
    return wait.until(ExpectedConditions.visibilityOfElementLocated(locator));
}

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