SpringMVC JavaConfig配置

以前通用的SpringMVC配置方法是使用web.xml加载SpringMVC以及使用spring的配置文件加载bean
servlet3.0以后可以直接用Java的方式配置springmvc

初始化

继承AbstractAnnotationConfigDispatcherServletInitializer类，并定义映射，spring配置类，root配置

public class MyWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    protected Class[] getRootConfigClasses() {
        return new Class[]{RootConfig.class};
    }

    protected Class[] getServletConfigClasses() {
        return new Class[]{WebConfig.class};
    }

    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
    protected Filter[] getServletFilters() {
        HiddenHttpMethodFilter hiddenHttpMethodFilter = new HiddenHttpMethodFilter();
        return new Filter[]{hiddenHttpMethodFilter};
    }
}

定义WebConfig

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.gggg")
public class WebConfig  extends WebMvcConfigurerAdapter{
    @Bean
    public ViewResolver viewResolver(){
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer){
        configurer.enable();
    }
}

定义RootConfig

@Configuration
@ComponentScan(basePackages = "com.ggg",excludeFilters = {@ComponentScan.Filter(type= FilterType.ANNOTATION,value = EnableWebMvc.class)})
public class RootConfig  {
}