在selenium和java中找不到类

Question

我试图学习硒网络驱动程序，但我遇到了一个问题。

我做了一个非常小的测试，看起来像这样：

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class Flows {

    public static void main(String[] args) {

        System.setProperty("webdriver.chrome.driver", "/Users/mn/Downloads/belikewater/chromedriver");
        WebDriver driver = new ChromeDriver();

        String baseUrl = "http://anywhere.c3a.dk/";


        driver.get(baseUrl);

        System.out.println(driver.getTitle());

        driver.close();

    }
}

我正在使用gradle，它看起来是这样的：

group 'com.cetrea'
version '1.0-SNAPSHOT'

apply plugin: 'java'

group = 'com.cetrea'
version = '1.0.0'
sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    compile('org.seleniumhq.selenium:selenium-java:2.41.0')
    testCompile group: 'junit', name: 'junit', version: '4.12'
}

jar {
    manifest{
        attributes 'Main-Class': 'com.cetrea.flowtesting.Flows'
    }
}

我要破例了

"main" java.lang.NoClassDefFoundError: org/openqa/selenium/WebDriver
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
    at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.openqa.selenium.WebDriver
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 7 more

我正在使用Mac OS，并尝试brew安装chromedriver，但我找不到它的路径，因为我对Mac也是非常陌生，所以我下载了一个zip并将chromedriver可执行文件复制到我的项目中。

也不记得如何获得完整的堆栈跟踪。.

**我一定是搞砸了什么。右键单击flows运行它，然后按run flows.main（）会出现另一个错误，因此它至少找到了现在需要的东西。但我得到以下错误。

Starting ChromeDriver (v2.8.241036) on port 47434
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
May 07, 2018 11:39:22 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
Exception in thread "main" org.openqa.selenium.WebDriverException: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:47434
Build info: version: '3.11.0', revision: 'e59cfb3', time: '2018-03-11T20:26:55.152Z'
System info: host: 'cetreas-MacBook-Pro.local', ip: 'fe80:0:0:0:c9e:2c67:1d27:4e0b%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.13.3', java.version: '1.8.0_161'
Driver info: driver.version: RemoteWebDriver
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:92)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:545)
    at org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:273)
    at com.cetrea.flows.Flows.main(Flows.java:15)
Caused by: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:47434
    at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:240)
    at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:158)
    at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:256)
    at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:134)
    at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:113)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:125)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
    at okhttp3.RealCall.execute(RealCall.java:77)
    at org.openqa.selenium.remote.internal.OkHttpClient.execute(OkHttpClient.java:101)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:155)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    ... 3 more
Caused by: java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at okhttp3.internal.platform.Platform.connectSocket(Platform.java:125)
    at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:238)
    ... 23 more

它会像防火墙一样阻止它吗？这是一台我已经借了半年的mac电脑，所以我还没有完全习惯于使用它。

Answer 1

你怎么运行它？

我怀疑这不是硒的问题。它看起来很可疑，就像你正在运行这样的应用程序：java-jaryour-jar-name.jar。但是你需要在类路径上提供所有需要的罐子。

一个简单的选择是添加以下行到您的gradle文件

apply plugin: 'application'
mainClassName = "com.cetrea.flowtesting.Flows"

然后以gradlerun

或者你可以让gradle把所有依赖性jar复制到你的某个地方，然后在你的课堂路径中提到它们。

如果下载了正确的驱动程序，则应成功运行。尽管您可能仍然需要更多的依赖项，如注释中提到的答案中所建议的。但是至少org.openqa.selenium.WebDriver应该已经在您的类路径上了。