Eclipse - java.lang.ClassNotFoundException [英] Eclipse - java.lang.ClassNotFoundException

问题描述

当试图从Eclipse开始我的JUnit-Test时，我得到一个ClassNotFoundException。当从控制台运行mvn test时 - 一切正常。此外，Eclipse中没有报告问题。

When trying to start my JUnit-Test out of Eclipse, I get a "ClassNotFoundException". When running "mvn test" from console - everything works fine. Also, there are no problems reported in Eclipse.

我的项目结构如下：

• 父项目（pom-packaging）
  
  
  
  
  • Web项目（war-packaging - 我的JUnit测试在这里）
  
  
  • Flex项目
  
  
  • 配置项目
  
  

  编辑：如何找不到班级？这是一个简单的HelloWorld应用程序，没有特殊的库。

  edit: How can the class not be found? It's a simple HelloWorld-Application with no special libraries.

  这是我的JUnit的运行配置：
  alt text http://www.walkner.biz/_temp/runco​​nfig.png

  Here's my JUnit's run-configuration: alt text http://www.walkner.biz/_temp/runconfig.png

  Testclass（但正如我所说;它不适用于简单的HelloWorld ...）：

  Testclass (but as I said; it doesn't work with a simple HelloWorld either...):

  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.support.ClassPathXmlApplicationContext;
  import biz.prognoserechnung.domain.User;
  import biz.prognoserechnung.domain.UserRepository;
  import biz.prognoserechnung.domain.hibernate.UserHibernateDao;
  
  public class UserDaoTest {
  /**
   * the applicationcontext.
   */
  private ApplicationContext ctx = null;
  
  /**
   * the user itself.
   */
  private User record = null;
  
  /**
   * Interface for the user.
   */
  private UserRepository dao = null;
  
  @Before
  public void setUp() throws Exception {
  String[] paths = { "WEB-INF/applicationContext.xml" };
  ctx = new ClassPathXmlApplicationContext(paths);
  dao = (UserHibernateDao) ctx.getBean("userRepository");
  }
  
  @After
  public void tearDown() throws Exception {
  dao = null;
  }
  
  @Test
  public final void testIsUser() throws Exception {
  Assert.assertTrue(dao.isUser("John", "Doe"));
  }
  
  @Test
      public final void testIsNoUser() throws Exception {
      Assert.assertFalse(dao.isUser("not", "existing"));
          Assert.assertFalse(dao.isUser(null, null));
          Assert.assertFalse(dao.isUser("", ""));
      }
  }
  

  
  

  推荐答案

  几次遇到这种情况，经过很多尝试，我找到了解决方案。

  I've come across that situation several times and, after a lot of attempts, I found the solution.

  检查您的项目构建路径并启用特定的输出文件夹对于每个文件夹。通过项目的每个源文件夹逐个进行设置，并设置maven将使用的输出文件夹。

  Check your project build-path and enable specific output folders for each folder. Go one by one though each source-folder of your project and set the output folder that maven would use.

  例如，您的Web项目的 src / main / java 应该有 target / classes 在Web项目下，测试类应该在web项目下也应该有 target / test-classes 。

  For example, your web project's src/main/java should have target/classes under the web project, test classes should have target/test-classes also under the web project and so.

  使用此配置将允许您执行eclipse中的单元测试。

  Using this configuration will allow you to execute unit tests in eclipse.

  只需一个建议，如果您的Web项目的测试需要一些配置文件在资源下，请确保将该文件夹作为源文件夹，并进行正确的构建路径配置。

  Just one more advice, if your web project's tests require some configuration files that are under the resources, be sure to include that folder as a source folder and to make the proper build-path configuration.

  希望它有帮助。

  这篇关于Eclipse - java.lang.ClassNotFoundException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！