用代码配置Spring Web MVC

初始化配置

public class MyWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        // 返回配置IoC容器的类的类对象
        return new Class<?>[] { AppConfig.class }; 
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        // 返回配置Spring MVC(视图解析器、控制器等)的类的类对象
        return new Class<?>[] { WebConfig.class };
    }

    @Override
    protected String[] getServletMappings() {
                // 前端控制器映射
        return new String[] { "/" };
    }

}

配置IoC容器的类

@Configuration
@EnableAspectJAutoProxy
@EnableTransactionManagement
@ComponentScan(basePackages = "com.kygo.springmvc")
public class AppConfig {
    
    @Bean
    public DataSource dataSource() {
        BasicDataSource dataSource = new BasicDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/dang?useUnicode=true&characterEncoding=utf8");
        dataSource.setUsername("root");
        dataSource.setPassword("123456");
        dataSource.setInitialSize(10);
        dataSource.setMaxIdle(50);
        return dataSource;
    }
    
    @Bean
    public LocalSessionFactoryBean sessionFactory(DataSource dataSource) {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource);
        sessionFactory.setPackagesToScan(new String[] { "com.kygo.springmvc.entity" });
        Properties props = new Properties();
        props.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
        props.setProperty("hibernate.show_sql", "true");
        props.setProperty("hibernate.format_sql", "true");
        sessionFactory.setHibernateProperties(props);
        return sessionFactory;
    }
    
    @Bean
    public HibernateTransactionManager transactionManager(SessionFactory sessionFactory) {
        return new HibernateTransactionManager(sessionFactory);
    }
}

配置Spring MVC(视图解析器、控制器等)的类

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.kygo.springmvc.controller")
public class WebConfig extends WebMvcConfigurerAdapter {    
    // 视图解析器
    @Bean
    public ViewResolver internalResourceViewResolver() {
        InternalResourceViewResolver resolver =
                new InternalResourceViewResolver();
        resolver.setViewClass(JstlView.class);
        resolver.setPrefix("/WEB-INF/jsp/");
        resolver.setSuffix(".jsp");
        return resolver;
    }
    
        // 静态网页依然由默认servlet处理
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
}

表单数据验证

需要jar包

validation-api-1.1.0.Final.jar
hibernate-validator-5.4.1.Final.jar

需要验证的数据

    @Pattern(regexp = "^\\w+([-_.]?\\w+)*@\\w+([\\.-]?\\w+)*(\\.\\w{2,6})+$")
    private String email;

控制器

public String register(@Valid UserRegDto userDto, Errors errors)