这是我的班级。我使用Selenium Chrome WebDriver在网站上自动执行操作。我的问题是我得到了一个NoClassDefFoundError，但这是不可能的，因为我已经在我的构建路径中包含了所有必需的.jars文件。发生了什么事？
public class TwitterAutoBot {
private WebDriver driver;
private String baseUrl;
private StringBuffer verificationErrors = new StringBuffer();
@Before
public void setUp() throws Exception {
// Google Chrome
File file = new File("C:\\Users\\User\\plugins\\TwitterAutoBot\\src\\chromedriver.exe");
System.setProperty("webdriver.chrome.driver", file.getAbsolutePath());
driver = new ChromeDriver();
// Firefox
// driver = new FirefoxDriver();
baseUrl = "https://www.twitter.com";
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
}
@Test
public void testValidation() throws Exception {
// Authentication information
String username = "asdfasdfasdf";
String password = "asdf123!";
// Open site
launchActivity("/");
// Maximize window
maximizeWindow();
// Enter authentication information
sendKeysAndWait("signin-email", username);
sendKeysAndWait("signin-password", password);
// Log in
clickButtonAndWait("//button[@type='submit']");
// Send 40 messages per hour for a total of 960 per day
for (int i = 1; i < 960; i++) {
sendMessageAndWait();
}
System.out.println("All messages have been sent.");
}
public void sendMessageAndWait() throws Exception {
driver.findElement(By.id("tweet-box-home-timeline")).click();
driver.findElement(By.xpath("(//button[@type='button'])[17]")).click();
driver.findElement(By.id("global-new-tweet-button")).click();
driver.findElement(By.xpath("(//button[@type='button'])[644]")).click();
System.out.println("Message sent.");
sleep();
}
private void maximizeWindow() throws InterruptedException {
driver.manage().window().maximize();
sleep();
}
/**
*
* @param extension The remainder of the URL, after baseUrl
*/
private void launchActivity(String extension) {
driver.get(baseUrl + extension);
}
/**s
* Writes a string to an HTML element and waits a random time
* @param elem The element to send the keys
* @param keys The string to write to the element
* @throws InterruptedException
*/
private void sendKeysAndWait(String elem, String keys) throws InterruptedException {
Math.random();
driver.findElement(By.id(elem)).clear();
driver.findElement(By.id(elem)).sendKeys(keys);
sleep();
}
/**
*
* @param id The id of the button found in HTML
* @throws InterruptedException
*/
private void clickButtonAndWait(String id) throws InterruptedException {
driver.findElement(By.id(id)).click();
sleep();
}
private void sleep() throws InterruptedException {
int randomWaitDuration = 75000 + (int)(Math.random() * 105000); ;
Thread.sleep(randomWaitDuration);
System.out.println(randomWaitDuration + " minutes since your last tweet.");
}
@After
public void tearDown() throws Exception {
driver.quit();
String verificationErrorString = verificationErrors.toString();
if (!"".equals(verificationErrorString)) {
fail(verificationErrorString);
}
}
}
我得到以下 NoClassDefFoundError：
java.lang.NoClassDefFoundError: org/openqa/selenium/remote/RenderedRemoteWebElement
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at TwitterAutoBot.setUp(TwitterAutoBot.java:33)
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:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: org.openqa.selenium.remote.RenderedRemoteWebElement
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 37 more
java.lang.NullPointerException
at TwitterAutoBot.tearDown(TwitterAutoBot.java:126)
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:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:36)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Java模块：
junit-4.10.jar
selenium-chrome-driver-2.0a4.jar
selenium-java-2.53.0-srcs.jar
selenium-java-2.53.0.jar
selenium-server-standalone-2.53.0.jar
答案 0 :(得分：1)