Java Selenium 问题

Question

我想要做的是读取每一行并将其输入到电子邮件中，它会执行一次，当我尝试“刷新”页面以清除文本框时，我收到错误。

    try (BufferedReader br = new BufferedReader(new FileReader("emails.txt"))) {
        String line;
        while ((line = br.readLine()) != null) {
            driver.get("https://signup.live.com/signup?wa=wsignin1.0&rpsnv=12&ct=1465840004&rver=6.7.6643.0&wp=&wreply=https%3a%2f%2fwww.msn.com%2fen-us%2fhomepage%2fSecure%2fPassport%3fru%3dhttp%253a%252f%252fwww.msn.com%252f%253focid%253dmailsignout%2526pfr%253d1&id=1184&pcexp=True&bk=1465840005&uiflavor=web&uaid=dc151162984741948b8371ce3e0c865e&mkt=EN-US&lc=1033&lic=1");
            Thread.sleep(650);
            Email.sendKeys(line);
            Refresher.click();
            Thread.sleep(650);
            if (TakenErrorMsg.isDisplayed()){
                System.out.println(line + " is taken!");

            }else{
                System.out.println(line + " is not taken!");
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

这就是错误，我是个新手，所以如果有人能告诉我如何“阅读”这个错误，那将会非常有帮助。

Exception in thread "AWT-EventQueue-0" org.openqa.selenium.StaleElementReferenceException: stale element reference: element is not attached to the page document
  (Session info: chrome=51.0.2704.103)
  (Driver info: chromedriver=2.21.371459 (36d3d07f660ff2bc1bf28a75d1cdabed0983e7c4),platform=Windows NT 10.0 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 9 milliseconds
For documentation on this error, please visit: http://seleniumhq.org/exceptions/stale_element_reference.html
Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46'
System info: host: 'DESKTOP-VOA61U9', ip: '192.168.0.2', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_73'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEnabled=false, chrome={chromedriverVersion=2.21.371459 (36d3d07f660ff2bc1bf28a75d1cdabed0983e7c4), userDataDir=C:\Users\Skid\AppData\Local\Temp\scoped_dir20756_575}, takesHeapSnapshot=true, databaseEnabled=false, handlesAlerts=true, hasTouchScreen=false, version=51.0.2704.103, platform=XP, browserConnectionEnabled=false, nativeEvents=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true, browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: b48d6cc33021d97d8a72976ad4d033b7
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
    at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:327)
    at org.openqa.selenium.remote.RemoteWebElement.sendKeys(RemoteWebElement.java:122)
    at tuna.tuna(tuna.java:28)
    at main$1.actionPerformed(main.java:37)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
    at java.awt.Component.processMouseEvent(Component.java:6535)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6300)
    at java.awt.Container.processEvent(Container.java:2236)
    at java.awt.Component.dispatchEventImpl(Component.java:4891)
    at java.awt.Container.dispatchEventImpl(Container.java:2294)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
    at java.awt.Container.dispatchEventImpl(Container.java:2280)
    at java.awt.Window.dispatchEventImpl(Window.java:2750)
    at java.awt.Component.dispatchEvent(Component.java:4713)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Answer 1

如果您阅读异常日志，第一行会告诉您出了什么问题:

Exception in thread "AWT-EventQueue-0" org.openqa.selenium.StaleElementReferenceException: stale element reference: element is not attached to the page document

这告诉你 selenium 抛出了 StaleElementReferenceException，如果你用 google 搜索，你将到达这个 selenium 文档页面( link )。这基本上解释了你试图通过 selenium 访问的元素不再存在于 DOM 中。

发生这种情况是因为您多次重新加载页面，您需要在每次页面加载时刷新元素的实例，您需要重新加载引用的元素是:

• 电子邮件
• 复习
• 采取错误消息