使用Java Selenium Firefox geckodriver时出现问题。这是问题所在：

• OS：Windows 7

• selenium ersion：Selenium 3.0.0 beta4

• Java：8

• Geckodriver：v0.10.0

Error msg: Exception in thread “main” java.lang.NoClassDefFoundError: org/openqa/selenium/remote/internal/CircularOutputStream at org.openqa.selenium.firefox.FirefoxBinary.(FirefoxBinary.java:56) at org.openqa.selenium.firefox.FirefoxBinary.(FirefoxBinary.java:52) at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:92) at tools.Cadencie.LoginCad(Cadencie.java:24) at tools.Cadencie.main(Cadencie.java:73) 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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) Caused by: java.lang.ClassNotFoundException: org.openqa.selenium.remote.internal.CircularOutputStream at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) … 10 more

码：

public class Cadencie {

static WebDriver driver;

public void LoginCad(){

    //System.setProperty("webdriver.firefox.bin", "C:\\Program Files (x86)\\Mozilla Firefox\\firefox.exe");

    System.setProperty("webdriver.gecko.driver", "C:\\Program Files (x86)\\Mozilla Firefox\\geckodriver.exe");

    driver = new FirefoxDriver();

    driver.get("http://172.16.1.133:8090/CADENCIE/servlet/app");

    try {

        Thread.sleep(1000);

    } catch(InterruptedException e){

        e.printStackTrace();

    }

    Utilities.switchToWindow("Cadencie - User Logon [LOGON]", driver);

    try{

        Thread.sleep(2000);

    } catch(InterruptedException e){

        e.printStackTrace();

    }

    driver.findElement(By.id("idBANK")).clear();
    driver.findElement(By.id("idBANK")).sendKeys("48");

    driver.findElement(By.id("idEMPLOYEE")).clear();
    driver.findElement(By.id("idEMPLOYEE")).sendKeys("200003");

    driver.findElement(By.id("idPASSWORD")).clear();
    driver.findElement(By.id("idPASSWORD")).sendKeys("Cadencie1");

    driver.findElement(By.id("maintLOGON")).click();

    driver.findElement(By.id("idPASSWORD")).clear();
    driver.findElement(By.id("idPASSWORD")).sendKeys("Cadencie1");

    driver.findElement(By.id("maint")).click();

}

我认为这可能是版本不一致的问题。因为我有另一个正在使用maven的自动化项目，所以selenium2.52.0
..但不确定是否会引起问题。我这次不使用Maven。只需尝试创建JAVA GUI程序（工具包）。