Spring4 javaConfig配置方式并集成JUnit

Spring是相当吊的项目，多数场景下均是通过XML配置的方式使用它，下面简单介绍如何通过JavaConfig方式进行配置。说个题外话，之所以研究JavaConfig是我在研究spring security的时候，中文材料少的可怜，找到了一篇外文博客，写的还是很赞的，Spring Security 4 Hibernate Integration Annotation+XML Example，博文下面有项目下载地址，该项目零XML配置，下面就通过该项目介绍。

HibernateConfiguration.java类：该类的作用可等同applicationContext.xml,个人觉得类名取得不直观，但是要影响关键是说下类上面的注解的作用。

package com.websystique.springsecurity.configuration;import java.util.Properties;import javax.annotation.Resource;import javax.sql.DataSource;import com.websystique.springsecurity.dao.UserDao;import org.hibernate.SessionFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.context.annotation.*;import org.springframework.core.env.Environment;import org.springframework.jdbc.datasource.DriverManagerDataSource;import org.springframework.orm.hibernate4.HibernateTransactionManager;import org.springframework.orm.hibernate4.LocalSessionFactoryBean;import org.springframework.security.core.userdetails.UserDetailsService;import org.springframework.transaction.annotation.EnableTransactionManagement;//说明类为IoC容器@Configuration//事务@EnableTransactionManagement//指定自动扫描包@ComponentScan(basePackages = { "com.websystique.springsecurity" })//配置文件@PropertySource(value = { "classpath:application.properties" })//指定使用CGLIB代理，并开启@EnableAspectJAutoProxy(proxyTargetClass = true)public class HibernateConfiguration {    @Autowired    private Environment environment;    @Bean    public LocalSessionFactoryBean sessionFactory() {        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();        sessionFactory.setDataSource(dataSource());        sessionFactory.setPackagesToScan(new String[] { "com.websystique.springsecurity.model" });        sessionFactory.setHibernateProperties(hibernateProperties());        return sessionFactory;     }    @Bean    public DataSource dataSource() {        DriverManagerDataSource dataSource = new DriverManagerDataSource();        dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));        dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));        dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));        dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));        return dataSource;    }        private Properties hibernateProperties() {        Properties properties = new Properties();        properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));        properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));        properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));        return properties;            }        @Bean    @Autowired    public HibernateTransactionManager transactionManager(SessionFactory s) {       HibernateTransactionManager txManager = new HibernateTransactionManager();       txManager.setSessionFactory(s);       return txManager;    }}

在HibernateConfiguration类中数据库源，事务，session工厂均有代码，很直观。

下面介绍如何集成Junit4，

很多资源spring-test与Junit4集成均是基于applicationContext.xml的，但是我们这里没有配置文件，所以需要做些改变：

新建一个基本的测试配置类：

package config;import com.websystique.springsecurity.configuration.HibernateConfiguration;import org.junit.runner.RunWith;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import org.springframework.test.context.web.WebAppConfiguration;import org.springframework.transaction.annotation.Transactional;/** * Created by li on 2016/1/14. *///指定测试类的运行者@RunWith(SpringJUnit4ClassRunner.class)//指定spring配置类@ContextConfiguration(classes = {HibernateConfiguration.class})//@WebAppConfiguration is a class-level annotation that is used to declare//that the ApplicationContext loaded for an integration test should be a WebApplicationContext.@WebAppConfiguration@Transactionalpublic class TestConfig {}

这里主要是ContextConfiguration的类要和上面的配置类对应好，下面集成Junit进行单元测试只要集成该基本类就可以了。下面进行单元测试：

package com.websystique.springsecurity.service;import config.TestConfig;import org.junit.Test;import javax.annotation.Resource;import static org.junit.Assert.assertNotNull;/** * Created by li on 2016/1/14. */public class UserServiceImplTest extends TestConfig{    @Resource(name = "userServiceImpl")    UserServiceImpl userServiceImpl;    @Test    public void testUserServiceClass() throws Exception {        assertNotNull(userServiceImpl);         System.out.println(userServiceImpl.getClass());    }}

注意：UserServiceImpl 集成了接口，正是使用的CGLIB做代理，所以才没有报错。

PS:

其中@EnableAspectJAutoProxy(proxyTargetClass = true)是我加入的，目的指定CLGLIB作为代理，是防止在Bean继承接口的，抛出nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'userServiceImpl' must be of type [com.websystique.springsecurity.service.UserServiceImpl], but was actually of type [com.sun.proxy.$Proxy43]异常。当然需要添加Maven依赖

<dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>${springframework.version}</version></dependency><dependency><groupId>org.aspectj</groupId><artifactId>aspectjrt</artifactId><version>${aspectj.version}</version></dependency><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>${aspectj.version}</version></dependency>