Spring MVC with Hibernate 使用 @-configuration 方法

Question

我一直盯着 Maven、Tomcat、Spring MVC 和 Hibernate 做示例。我选择@-configuration 方法。用我的项目归档你可以download here。

但是当我在我的配置类中声明所有必需的bean并从我的主页单击简单链接时，控制台中显示了许多错误，例如：

ClassNotFoundException: org.springframework.orm.hibernate4.LocalSessionFactoryBean

请给我建议如何解决这个问题。

这是我的配置类：

package com.onet.init;

import java.util.Properties;

import javax.annotation.Resource;
import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.orm.hibernate4.LocalSessionFactoryBean;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.JstlView;
import org.springframework.web.servlet.view.UrlBasedViewResolver;

@Configuration
@ComponentScan("com.onet")
@EnableWebMvc
@PropertySource("classpath:application.properties")
public class BaseConfig {

    private static final String PROPERTY_NAME_DATABASE_DRIVER = "db.driver";
    private static final String PROPERTY_NAME_DATABASE_PASSWORD = "db.password";
    private static final String PROPERTY_NAME_DATABASE_URL = "db.url";
    private static final String PROPERTY_NAME_DATABASE_USERNAME = "db.username";

    private static final String PROPERTY_NAME_HIBERNATE_DIALECT = "hibernate.dialect";
    private static final String PROPERTY_NAME_HIBERNATE_FORMAT_SQL = "hibernate.format_sql";
    private static final String PROPERTY_NAME_HIBERNATE_NAMING_STRATEGY = "hibernate.ejb.naming_strategy";
    private static final String PROPERTY_NAME_HIBERNATE_SHOW_SQL = "hibernate.show_sql";
    private static final String PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN = "entitymanager.packages.to.scan";

    @Resource
    private Environment env;

    @Bean
    public DataSource dataSource() {
        BasicDataSource ds = new BasicDataSource();

        ds.setDriverClassName(env.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER));
        ds.setUrl(env.getRequiredProperty(PROPERTY_NAME_DATABASE_URL));
        ds.setUsername(env.getRequiredProperty(PROPERTY_NAME_DATABASE_USERNAME));
        ds.setPassword(env.getRequiredProperty(PROPERTY_NAME_DATABASE_PASSWORD));

        return ds;
    }

    @Bean
    public LocalSessionFactoryBean sessionFactory() {       
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();

        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(env.getRequiredProperty(PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN));
        sessionFactory.setHibernateProperties(hibProperties());

        return sessionFactory;
    }

    private Properties hibProperties() {
        Properties properties = new Properties();
        properties.put(PROPERTY_NAME_HIBERNATE_DIALECT, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_DIALECT));
        properties.put(PROPERTY_NAME_HIBERNATE_SHOW_SQL, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_SHOW_SQL));
        properties.put(PROPERTY_NAME_HIBERNATE_FORMAT_SQL, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_FORMAT_SQL));
        properties.put(PROPERTY_NAME_HIBERNATE_NAMING_STRATEGY, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_NAMING_STRATEGY));
        return properties;  
    }

    @Bean
    public HibernateTransactionManager transactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(sessionFactory().getObject());
        return transactionManager;
    }

    @Bean
    public UrlBasedViewResolver setupViewResolver() {
        UrlBasedViewResolver resolver = new UrlBasedViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        resolver.setViewClass(JstlView.class);
        return resolver;
    }

}

这是我实现 WebApplicationInitializer 的类：

package com.onet.init;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration.Dynamic;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class Initializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
        ctx.register(BaseConfig.class);

        Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(ctx));
        servlet.addMapping("*.html");
        servlet.setLoadOnStartup(1);
    }

}

Answer 1

ClassNotFoundException 异常意味着你在运行时没有一些需要的类/库。

如果您使用任何 IDE，请搜索 LocalSessionFactoryBean 类的位置。

当你找到这个类的库（我想是 spring-orm）时，只需将它放到类路径中就可以了。