java-使用sendKeys的消息“ org.openqa.selenium.InvalidSelectorException：无效选择器：无法使用XPath表达式定位元素”

我在尝试使用Selenium上传文件时遇到麻烦.由于浏览按钮没有输入标签,因此无法使用sendKeys()函数传递路径.它是用Angular编写的.

这是浏览按钮元素：

<a id="attachmentUpload-browse0" name="attachmentUpload-browse0" ng-click="clickbrowse($index)" class="btn-pri" xpath="1"></a>

我确实在源代码上方的代码下方找到了一个输入标签,但是尝试使用.sendKeys()时出现错误.

<input type="file" id="attachmentUpload-file0" name="attachmentUpload-file0" fileread="$parent.attachments[$index].fileData" class="attachmentUpload-inputfile ng-isolate-scope" onchange="angular.element(this).scope().onFileChange(this)" style="" xpath="1">

编辑：使用.sendKeys()输入标签时出错

Exception in thread "main" org.openqa.selenium.InvalidSelectorException: invalid selector: Unable to locate an element with the xpath expression //input[@id="attachmentUpload-file0"]// because of the following error:
SyntaxError: Failed to execute 'evaluate' on 'Document': The string '//input[@id="attachmentUpload-file0"]//' is not a valid XPath expression.
*** Element info: {Using=xpath, value=//input[@id="attachmentUpload-file0"]//}
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:423)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:214)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:166)
at org.openqa.selenium.remote.http.JsonHttpResponseCodec.reconstructValue(JsonHttpResponseCodec.java:40)
at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:80)
at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:44)
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:545)
at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:319)
at org.openqa.selenium.remote.RemoteWebDriver.findElementByXPath(RemoteWebDriver.java:421)
at org.openqa.selenium.By$ByXPath.findElement(By.java:361)
at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:311)
at com.ibm.esh.o2c.art.Tester.runTest(Tester.java:61)
at com.ibm.esh.o2c.art.Tester.main(Tester.java:70)

将标签用于attachmentUpload-browse0时出错：

Exception in thread "main" org.openqa.selenium.WebDriverException: unkNown error: cannot focus element

解决方法:

此错误消息…

org.openqa.selenium.InvalidSelectorException: invalid selector: Unable to locate an element with the xpath expression //input[@id="attachmentUpload-file0"]// because of the following error:
SyntaxError: Failed to execute 'evaluate' on 'Document': The string '//input[@id="attachmentUpload-file0"]//' is not a valid XPath expression.

…表示您的XPath表达式不是有效的表达式.

您可以使用以下代码行：

driver.findElement(By.xpath("//input[@id='attachmentUpload-file0']")).sendKeys("test");