[英]I got java.lang.NoClassDefFoundError when trying to automate a forum using POM in Selenium… how can I fix this?
我正在嘗試將POM用於要自動化的網頁,但出現以下錯誤:
Exception in thread "main" java.lang.NoClassDefFoundError: com/beust/jcommander/ParameterException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.beust.jcommander.ParameterException
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)
... 7 more
我不確定發生了什么。 我將TestNG以及所有jar文件添加到Selenium中。 無論如何,這是代碼:
第一個是來自我名為Forumloginapplication.java的文件,位於名為testcases的程序包中
package testcases;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.Test;
import objectrepository.SimpleProgrammerForum;
public class Forumloginapplication {
@Test
public void Login() {
System.setProperty("webdriver.chrome.driver", "C:\\Users\\Adam\\Downloads\\chromedriver.exe");
WebDriver driver=new ChromeDriver();
driver.get("https://simpleprogrammer.com/members/");
SimpleProgrammerForum sp=new SimpleProgrammerForum(driver);
sp.Loginnav().click();
sp.Userid().sendKeys("10asmock");
sp.Userpass().sendKeys("secret");
sp.Rememberme().click();
sp.Login_button().click();
}
}
在一個稱為objectrepository的程序包中,此程序名為SimpleProgrammerForum.java:
package objectrepository;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
public class SimpleProgrammerForum {
WebDriver driver;
public SimpleProgrammerForum(WebDriver driver) {
this.driver = driver;
}
By login_navbar=By.xpath("//span[@class='p-navgroup-linkText'][contains(text(),'Log in')]");
By username=By.name("login");
By password=By.name("password");
By login_checkbox=By.name("remember");
By login_button=By.className("button-text");
public WebElement Loginnav() {
return driver.findElement(login_navbar);
}
public WebElement Userid() {
return driver.findElement(username);
}
public WebElement Userpass() {
return driver.findElement(password);
}
public WebElement Rememberme() {
return driver.findElement(login_checkbox);
}
public WebElement Login_button() {
return driver.findElement(login_button);
}
}
運行程序時得到的另一件事是一個彈出窗口,提示我:“錯誤:發生了JNI錯誤,請檢查您的安裝,然后重試。” 隨后是另一個彈出窗口,其中指出:“發生Java異常。”
TestNG具有JCommander依賴項:
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.14.3</version>
<name>testng</name>
<description>A testing framework for the JVM</description>
<url>http://testng.org</url>
...
<dependencies>
<dependency>
<groupId>com.beust</groupId>
<artifactId>jcommander</artifactId>
<version>1.72</version>
</dependency>
...
</dependencies>
</project>
您將需要使用Maven或將所有TestNG依賴項手動添加為jar文件。
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