在基于Java的Spring配置中创建applicationContext bean

Question

I'm trying to build from scratch spring-based application using Java configurations, but I'm getting warning which I completely don't understand... Can someone tell me what is wrong there?

Error: WARNING: Exception encountered during context initialization - cancelling refresh attempt org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'applicationContext': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.context.ApplicationContext]: Specified class is an interface

Aplication initializer:

public class SpringWebAppInitializer  implements WebApplicationInitializer {

@Override
public void onStartup(ServletContext servletContext) throws ServletException {

    AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
    appContext.register(ApplicationContext.class);

    ServletRegistration.Dynamic dispatcher = servletContext.addServlet("SpringDispatcher", new DispatcherServlet(appContext));
    dispatcher.setLoadOnStartup(1);
    dispatcher.addMapping("/");

    servletContext.addListener(new ContextLoaderListener(appContext));
}
}

Application context configuration:

@Configuration
@ComponentScan("pl.wybornie.entity.*")
@EnableTransactionManagement
public class ApplicationContextConfig {

@Bean(name = "viewResolver")
public InternalResourceViewResolver getViewResolver() {

    InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
    viewResolver.setPrefix("/WEB-INF/pages/");
    viewResolver.setSuffix(".jsp");
    return viewResolver;
}

@Bean(name = "dataSource")
public DataSource getDataSource() {
    BasicDataSource dataSource = new BasicDataSource();
    dataSource.setDriverClassName("com.mysql.jdbc.Driver");
    dataSource.setUrl("jdbc:mysql://localhost:3306/wyborniedb");
    dataSource.setUsername("root");
    dataSource.setPassword("root123");

    return dataSource;
}

@Autowired
@Bean(name = "sessionFactory")
public SessionFactory getSessionFactory(DataSource dataSource) {

    LocalSessionFactoryBuilder sessionBuilder = new LocalSessionFactoryBuilder(dataSource);

    //sessionBuilder.addAnnotatedClasses(User.class);
    sessionBuilder.scanPackages("pl.wybornie.entity", "pl.wybornie.entity.cookBook");

    return sessionBuilder.buildSessionFactory();
}

@Autowired
@Bean(name = "transactionManager")
public HibernateTransactionManager getTransactionManager(SessionFactory sessionFactory) {

    HibernateTransactionManager transactionManager = new   HibernateTransactionManager(sessionFactory);
    return transactionManager;
}
  }

These are only 2 configuration classes for whole project.

Whole code can be found at: https://github.com/annweg/wybornie.pl/tree/new_build/project_workspace/wybornie

I'm quite newbie with spring and maybe there is some configuration missing there... I'm using Spring 4.1.6, Tomcat 7 and Java 7.

edit: I have tried to register both ApplicationContext from Spring and my own configuration class - ApplicationContextConfig - the error is the same. I've deleted Tomcat server and created new one, reopened Eclipse and still the same. Either importing project as new (deleting all settings and .project file) didn't help, so maybe the error is somewhere in configuration...?

Answer 1

The problem was with my Eclipse settings. I've delete all project content, change workspace and just copy/paste all classes and libs and the error is gone.

Answer 2

Well, this type of error is often related to missing jars and/or classpath error. Check if you have some libraries not added to classpath, or the project is requiring some libs that are previously present but then removed. Sometimes I add jars to classpath and remove them and it works.