Spring MVC without configuration file

Spring MVC without configuration file

 

1. Create a dynamic web project
2. Implement your own WebApplicationInitializer

public class MyWebApplicationInitializer implements WebApplicationInitializer {       @Override     public void onStartup(ServletContext servletCxt) {             // Load Spring web application configuration         AnnotationConfigWebApplicationContext ac = new AnnotationConfigWebApplicationContext();              ac.register(WebConfig.class, ViewConfig.class);           // Create and register the DispatcherServlet         DispatcherServlet servlet = new DispatcherServlet(ac);         ServletRegistration.Dynamic registration = servletCxt.addServlet("app", servlet);         registration.setLoadOnStartup(1);         registration.addMapping("*.do");     } }

 

1. Implement WebMvcConfigurer

@Configuration @EnableWebMvc @ComponentScan("net.ly.blue.user") public class WebConfig implements WebMvcConfigurer {          @Override        public void addResourceHandlers(ResourceHandlerRegistry registry) {              System.out.println("------------------ addResourceHandlers");               registry.addResourceHandler("/resources/**").addResourceLocations("/public/").resourceChain(true)                            .addResolver(new VersionResourceResolver().addContentVersionStrategy("/**"));        } }

 

1. Add view resolver

@Configuration public class ViewConfig {          @Bean        public ViewResolver urlBasedViewResolver() {              UrlBasedViewResolver viewResolver;              viewResolver = new UrlBasedViewResolver();              viewResolver.setOrder(2);              // viewResolver.setPrefix(""/WEB-INF/);              viewResolver.setSuffix(".jspx");              viewResolver.setViewClass(JstlView.class);              // for debug envirment              viewResolver.setCache(false);              return viewResolver;        }        @Bean        public ViewResolver resourceViewResolver() {              InternalResourceViewResolver viewResolver=new InternalResourceViewResolver();              viewResolver.setOrder(1);              viewResolver.setPrefix("");              viewResolver.setSuffix(".jsp");              return viewResolver;        } }

 

1. Write a simple controller

package net.ly.blue.user;   import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod;   @Controller @RequestMapping("/sayHello") public class HelloController {                @RequestMapping(method = RequestMethod.GET)                public String printHello(ModelMap model) {                               model.addAttribute("message", "Hello Spring MVC Framework!");                               System.out.println("enter hello");                                                             return "hello";                } }

 

1. Project structure