调用android驱动，提示

Exception in thread "main" java.lang.NoClassDefFoundError: org/openqa/selenium/remote/ProtocolHandshake

at io.appium.java_client.AppiumDriver.<init>(AppiumDriver.java:93)

at io.appium.java_client.android.AndroidDriver.<init>(AndroidDriver.java:93)

at com.easl.demo.AppTest.main(AppTest.java:23)

Caused by: java.lang.ClassNotFoundException: org.openqa.selenium.remote.ProtocolHandshake

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

... 3 more