問題描述

當(dāng)我執(zhí)行以下代碼時:

driver.findElement(By.className("qview-product-name")).click();

我收到以下錯誤

Session ID: d5df6f837164b1738991e8dc09027fe0
*** Element info: {Using=class name, value=qview-product-name}
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:187)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:122)
    at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:323)
    at org.openqa.selenium.remote.RemoteWebDriver.findElementByClassName(RemoteWebDriver.java:412)
    at org.openqa.selenium.By$ByClassName.findElement(By.java:389)
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:315)
    at Logins.bcLogin(Logins.java:140)
    at Exception.main(Exception.java:54)

我正在處理的網(wǎng)頁肯定包含以下 HTML 代碼，我已嘗試等待適當(dāng)?shù)臅r間來執(zhí)行.

The webpage I am working on definately contains the following HTML code and I have tried waiting an appropriate amount of time to execute.

<dd class="qview-product-name">
    <span class="note">1 x </span>
                    <a href="Link_here"_blank">Title</a>
            </dd>

我以為我在使用各種方法定位元素方面已經(jīng)做得很好了，但這讓我很難過.關(guān)于我應(yīng)該如何進(jìn)行故障排除的任何想法?謝謝！

I thought I was getting pretty good at locating elements using the various methods, but this has me stumped. Any ideas on how I should go about troubleshooting? Thanks!

推薦答案

您需要注意以下幾點:

• By.className("qview-product-name") 指的是父 <dd> 標(biāo)簽，可能不是您想要單擊的所需元素.相反，您的用例必須是單擊 <a href="Link_here"_blank">Title</a> 元素.

• 根據(jù)最佳實踐，在調(diào)用 click() 時，您需要為 elementToBeClickable()WebDriverWait> 并且您可以使用以下任一定位器策略:

• By.className("qview-product-name") refers to the parent <dd> tag and perhaps is not the desired element you want to click. Rather your usecase must be to click on the <a href="Link_here"_blank">Title</a> element.

• As per best practices, while invoking click() you need to induce you need to induce WebDriverWait for the elementToBeClickable() and you can use either of the following Locator Strategies:

linkText:

new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.linkText("Title"))).click();

new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.cssSelector("dd.qview-product-name a[href='Link_here']"))).click();

new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.xpath("http://dd[@class='qview-product-name']//a[@href='Link_here' and text()='Title']"))).click();

確保:

• JDK 升級到當(dāng)前級別 JDK 8u222.
• Selenium 已升級到當(dāng)前級別版本 3.141.59.
• ChromeDriver 已更新為當(dāng)前 ChromeDriver v77.0 級別.
• Chrome 已更新至當(dāng)前 Chrome 版本 77.0 級別.(根據(jù) ChromeDriver v77.0 發(fā)行說明)
• 清理你的項目工作區(qū)通過你的IDE和重建你的項目只需要依賴.
• 如果您的基本 Web 客戶端 版本太舊，請卸載它并安裝最新的 GA 和發(fā)布版本的 Web 客戶端.
• 進(jìn)行一次系統(tǒng)重啟.
• 以 非 root 用戶身份執(zhí)行您的 @Test.

• JDK is upgraded to current levels JDK 8u222.
• Selenium is upgraded to current levels Version 3.141.59.
• ChromeDriver is updated to current ChromeDriver v77.0 level.
• Chrome is updated to the current Chrome Version 77.0 level. (as per ChromeDriver v77.0 release notes)
• Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
• If your base Web Client version is too old, then uninstall it and install a recent GA and released version of Web Client.
• Take a System Reboot.
• Execute your @Test as non-root user.

這篇關(guān)于sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 通過 Selenium 和 Java 使用 findElement(By.className())的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！