SpringMVC+Spring4+hibernate5使用java类配置spring和springmvc环境(不用配置web.xml)

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使用Spring提供的@Configuration注解配置Spring的应用上下文

//spring应用上下文配置类@Configuration@ComponentScan(basePackageClasses={SpringConfiguration.class},excludeFilters={@Filter(type=FilterType.ANNOTATION,value=EnableWebMvc.class)})//声明包扫描，并将@EnableWebMvc注解声明的类扫描包除去@EnableTransactionManagement@ImportResource(locations={"classpath:beans.xml"})@PropertySource({"classpath:jdbc.properties"})//导入peoperties文件public class SpringConfiguration {    /**    *简单配置数据源和hibernate的SessionFactory    */    @Autowired    private Environment env;    @Bean(name="sessionFactory")    public LocalSessionFactoryBean sessionFactory() {        LocalSessionFactoryBean sfb=new LocalSessionFactoryBean();        sfb.setDataSource(dataSource());        sfb.setPackagesToScan("org.learn.sshmvc.model");        Properties prop=new Properties();        prop.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");        prop.setProperty("hibernate.show_sql", "true");        prop.setProperty("hibernate.hbm2ddl.auto", "update");        prop.setProperty("hibernate.format_sql", "false");        sfb.setHibernateProperties(prop);        return sfb;    }    @Bean(destroyMethod="close")    public BasicDataSource dataSource() {        BasicDataSource dataSource=new BasicDataSource();        dataSource.setUsername(env.getProperty("jdbc.username"));        dataSource.setPassword(env.getProperty("jdbc.password"));        dataSource.setUrl(env.getProperty("jdbc.url"));        dataSource.setDriverClassName(env.getProperty("jdbc.driverClassName"));        dataSource.setInitialSize(1);        dataSource.setMinIdle(1);        dataSource.setMaxIdle(20);        return dataSource;    }    @Bean(name="transactionManager")    @Autowired    @Required    public HibernateTransactionManager transactionManager(SessionFactory s) {        HibernateTransactionManager txManager=new HibernateTransactionManager();        txManager.setSessionFactory(s);        return txManager;    }}

再进行和SpringMVC相关的viewReslover和Contorller的配置

@Configuration@EnableWebMvc//声明为mvc配置@ComponentScan(basePackages={"org.learn.sshmvc.controller"})//扫描web controllerpublic class WebConfig extends WebMvcConfigurerAdapter{    /**    *继承WebMvcConfigurerAdapter类    */    @Bean//配置InternalResourceViewResolver，和xml配置一样    public ViewResolver viewResolver() {        InternalResourceViewResolver resolver=new InternalResourceViewResolver();        resolver.setPrefix("/WEB-INF/jsp/");        resolver.setSuffix(".jsp");        resolver.setExposeContextBeansAsAttributes(true);        return resolver;    }    @Override//重写configureDefaultServletHandling方法，并允许静态资源直接访问    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {        configurer.enable();    }}

Web环境初始化的类，相当于在web.xml配置spring的监听器和DispatcherServlet（只有在Servlet3.0后的环境中才能使用）

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;/** * 继承AbstractAnnotationConfigDispatcherServletInitializer * 抽象类覆盖三个方法 */public class WebappInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {    @Override//配置Spring应用上下文的配置类    protected Class<?>[] getRootConfigClasses() {        return new Class[]{SpringConfiguration.class};    }    @Override//配置web controller和view的配置类    protected Class<?>[] getServletConfigClasses() {        return new Class<?>[]{WebConfig.class};    }    @Override//相当于在DispatcherServlet中配置路径"/"    protected String[] getServletMappings() {        return new String[]{"/"};    }}

这样就实现了不用再web.xml中配置spring了

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