Spring – Java Based Configuration

BasicConfig.java

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package com.learningtask.init;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.JstlView;
import org.springframework.web.servlet.view.UrlBasedViewResolver;

@Configuration
@ComponentScan(basePackages ="com.learningtask")
@EnableWebMvc
public class BasicConfig extends WebMvcConfigurerAdapter{

	@Bean
	public UrlBasedViewResolver setupResolver()
	{
		UrlBasedViewResolver resolver = new UrlBasedViewResolver();
		resolver.setViewClass(JstlView.class);
		resolver.setPrefix("/WEB-INF/views/");
		resolver.setSuffix(".jsp");
		return resolver;
	}
}

MyWebApplicationInitializer.java

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package com.learningtask.init;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;

import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class MyWebApplicationInitializer implements WebApplicationInitializer{

	public void onStartup(ServletContext servletContext) throws ServletException {
		AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
		appContext.register(BasicConfig.class);
		servletContext.addListener(new ContextLoaderListener(appContext));
		ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet",new DispatcherServlet(appContext));
		dispatcher.addMapping("/");
		dispatcher.setLoadOnStartup(1);

	}

}

HomeController.java

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package com.learningtask.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HomeController {
	@RequestMapping("/")
	public String home()
	{
		System.out.println("Home Controller");
		return "home";
	}
	
	
}