This
is continuation to my previous post, I explained the usage of BeanNameUrlHandlerMapping
by xml configuration approach. In this post, I am going to give an example of
annotation based approach.
<bean
class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"
/>
<bean
name="/hello" class="com.sample.myApp.controllers.HelloWorldController"
/>
Java
equivalent of above xml configuration looks like below.
@Configuration
public class
BeanNameUrlHandlerMappingConfig {
@Bean
BeanNameUrlHandlerMapping
beanNameUrlHandlerMapping() {
return new BeanNameUrlHandlerMapping();
}
@Bean("/hello")
public HelloWorldController welcome() {
return new
HelloWorldController();
}
}
Find
the below working application.
package com.sample.myApp.configurations; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping; import com.sample.myApp.controllers.HelloWorldController; @Configuration public class BeanNameUrlHandlerMappingConfig { @Bean BeanNameUrlHandlerMapping beanNameUrlHandlerMapping() { return new BeanNameUrlHandlerMapping(); } @Bean("/hello") public HelloWorldController welcome() { return new HelloWorldController(); } }
HelloWorldController.java
package com.sample.myApp.controllers; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.AbstractController; public class HelloWorldController extends AbstractController { @Override protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception { ModelAndView modelAndView = new ModelAndView("hello"); modelAndView.addObject("message", "Welcome to Spring MVC framework"); return modelAndView; } }
Define
hello.jsp file under WEB-INF/jsp folder.
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Hello World Spring Web MVC</title> </head> <body> <h2>${message}</h2> </body> </html>
Define
web.xml, HelloWorld-servlet.xml files under WEB-INF folder.
web.xml
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>Spring MVC Hello WorldApplication</display-name> <servlet> <servlet-name>HelloWorld</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>HelloWorld</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
HelloWorld-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:component-scan base-package="com.sample.myApp" /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
Define
index.jsp under webapp folder.
<html> <body> <h2>Hello World!</h2> </body> </html>
Project
structure looks like below.
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