Question

我是新手，所以要耐心:) 我尝试启动简单测试，并遇到以下问题：java.lang.ClassNotFoundException：org.openqa.selenium.remote.codec.w3c.W3CHttpCommandCodec

我已经设置了java-client 7.1.0和selenium-server-standalone-3.141.59 您可以在这里看到其他库：https://screencast.com/t/I3Zg7KDFxbO似乎我在依赖项上做错了什么，但我找不到可以理解的（对我而言）回答我应该做什么。

java.lang.NoClassDefFoundError: org/openqa/selenium/remote/codec/w3c/W3CHttpCommandCodec

at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:262)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:41)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:213)
at io.appium.java_client.AppiumDriver.startSession(AppiumDriver.java:323)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:131)
at io.appium.java_client.DefaultGenericMobileDriver.<init>(DefaultGenericMobileDriver.java:37)
at io.appium.java_client.AppiumDriver.<init>(AppiumDriver.java:86)
at io.appium.java_client.AppiumDriver.<init>(AppiumDriver.java:96)
at io.appium.java_client.android.AndroidDriver.<init>(AndroidDriver.java:94)
at FirstTest.setUp(FirstTest.kt:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.ClassNotFoundException: org.openqa.selenium.remote.codec.w3c.W3CHttpCommandCodec
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 36 more

Answer 1

面对相同的问题，我刚刚将selenium java客户端更新为4.0.0-alpha-1问题得到解决

我的依赖：

     <dependency>
        <groupId>org.testng</groupId>
        <artifactId>testng</artifactId>
        <version>6.14.3</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-java</artifactId>
        <version>4.0.0-alpha-1</version>
    </dependency>


    <dependency>
        <groupId>io.appium</groupId>
        <artifactId>java-client</artifactId>
        <version>7.1.0</version>
    </dependency>

    <dependency>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.7.0</version>
    </dependency>

Answer 2

更新一个依赖项时，您可能会收到此异常。例如：Appium java客户端最新，但是从属Selenium Java依赖项未更新到最新，那么您可能会遇到此问题。因此，请查看您对相关Maven的依赖。

Answer 3

您必须添加一个网络驱动程序，例如：

<dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-firefox-driver</artifactId>
    <version>3.141.59</version>
</dependency>

org / openqa / selenium / remote / codec / w3c / W3CHttpCommandCodec是

的一部分

<dependency>
   <groupId>org.seleniumhq.selenium</groupId>
   <artifactId>selenium-remote-driver</artifactId>
   <version>3.14.0</version>
</dependency>

是selenium-firefox-driver的依赖项

java.lang.NoClassDefFoundError：org / openqa / selenium / remote / codec / w3c / W3CHttpCommandCodec

3 个答案: