Created project "spring-mvc-web-vs-initializer" for the web.xml vs Initializer article. (#663)

* Created spring-mvc-web-vs-initializer project

* Code style check

spring-mvc-web-vs-initializer/src/main/java/org/baeldung/config/AppInitializer.java

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+package org.baeldung.config;
+
+import org.springframework.web.WebApplicationInitializer;
+import org.springframework.web.context.ContextLoaderListener;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+import org.springframework.web.servlet.DispatcherServlet;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRegistration;
+
+public class AppInitializer implements WebApplicationInitializer {
+
+    @Override
+    public void onStartup(ServletContext container) throws ServletException {
+        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
+        context.setConfigLocation("org.baeldung.config");
+
+        container.addListener(new ContextLoaderListener(context));
+
+        ServletRegistration.Dynamic dispatcher = container.addServlet("java-servlet", new DispatcherServlet(context));
+        dispatcher.setLoadOnStartup(1);
+        dispatcher.addMapping("/java-servlet/*");
+    }
+
+}

spring-mvc-web-vs-initializer/src/main/java/org/baeldung/config/MvcConfig.java

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+package org.baeldung.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.ViewResolver;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+import org.springframework.web.servlet.view.InternalResourceViewResolver;
+
+@Configuration
+@EnableWebMvc
+@ComponentScan(basePackages = "org.baeldung.controller.java")
+public class MvcConfig extends WebMvcConfigurerAdapter {
+
+    @Bean
+    public ViewResolver viewResolver() {
+        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
+        viewResolver.setPrefix("/WEB-INF/view/");
+        viewResolver.setSuffix(".jsp");
+
+        return viewResolver;
+    }
+
+}

spring-mvc-web-vs-initializer/src/main/java/org/baeldung/controller/java/JavaController.java

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+package org.baeldung.controller.java;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.servlet.ModelAndView;
+
+@Controller
+public class JavaController {
+
+    @RequestMapping(value = "/endpoint")
+    public ModelAndView handleRequestFromJavaConfiguredServlet() {
+        ModelAndView mv = new ModelAndView();
+        mv.setViewName("from-java");
+
+        return mv;
+    }
+
+}

spring-mvc-web-vs-initializer/src/main/java/org/baeldung/controller/xml/XmlController.java

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+package org.baeldung.controller.xml;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.servlet.ModelAndView;
+
+@Controller
+public class XmlController {
+
+    @RequestMapping(value = "/endpoint")
+    public ModelAndView handleRequestFromXmlConfiguredServlet() {
+        ModelAndView mv = new ModelAndView();
+        mv.setViewName("from-xml");
+
+        return mv;
+    }
+
+}

spring-mvc-web-vs-initializer/src/main/resources/mvc-configuration.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xmlns:context="http://www.springframework.org/schema/context"
+	   xmlns:mvc="http://www.springframework.org/schema/mvc"
+	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
+
+	<context:component-scan base-package="org.baeldung.controller.xml" />
+	<mvc:annotation-driven />
+
+	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
+		<property name="prefix">
+			<value>/WEB-INF/view/</value>
+		</property>
+		<property name="suffix">
+			<value>.jsp</value>
+		</property>
+	</bean>
+
+</beans>

spring-mvc-web-vs-initializer/src/main/webapp/WEB-INF/view/from-java.jsp

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+<html>
+<head></head>
+
+<body>
+	<h1>Java</h1>
+</body>
+</html>

spring-mvc-web-vs-initializer/src/main/webapp/WEB-INF/view/from-xml.jsp

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+<html>
+<head></head>
+
+<body>
+	<h1>XML</h1>
+</body>
+</html>

spring-mvc-web-vs-initializer/src/main/webapp/WEB-INF/web.xml

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+<web-app
+        xmlns="http://java.sun.com/xml/ns/javaee"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
+        version="3.0">
+
+    <servlet>
+        <servlet-name>xml-servlet</servlet-name>
+        <servlet-class>
+            org.springframework.web.servlet.DispatcherServlet
+        </servlet-class>
+        <load-on-startup>1</load-on-startup>
+        <init-param>
+            <param-name>contextConfigLocation</param-name>
+            <param-value>classpath*:mvc-configuration.xml</param-value>
+        </init-param>
+    </servlet>
+
+    <servlet-mapping>
+        <servlet-name>xml-servlet</servlet-name>
+        <url-pattern>/xml-servlet/*</url-pattern>
+    </servlet-mapping>
+
+</web-app>

spring-mvc-web-vs-initializer/src/test/java/org/baeldung/controller/JavaServletTest.java

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+package org.baeldung.controller;
+
+import org.baeldung.config.MvcConfig;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.AnnotationConfigWebContextLoader;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.servlet.ModelAndView;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@WebAppConfiguration
+@ContextConfiguration(loader=AnnotationConfigWebContextLoader.class, classes = MvcConfig.class)
+public class JavaServletTest {
+
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setUp() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
+    }
+
+    @Test
+    public void testJavaEndpoint() throws Exception {
+        ModelAndView mv = this.mockMvc.perform(MockMvcRequestBuilders.get("/endpoint"))
+                .andReturn()
+                .getModelAndView();
+
+        // validate view name
+        Assert.assertSame(mv.getViewName(), "from-java");
+    }
+
+}

spring-mvc-web-vs-initializer/src/test/java/org/baeldung/controller/XmlServletTest.java

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+package org.baeldung.controller;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.GenericXmlWebContextLoader;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.servlet.ModelAndView;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@WebAppConfiguration
+@ContextConfiguration(loader=GenericXmlWebContextLoader.class, locations = "classpath*:mvc-configuration.xml")
+public class XmlServletTest {
+
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setUp() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
+    }
+
+    @Test
+    public void testXmlEndpoint() throws Exception {
+        ModelAndView mv = this.mockMvc.perform(MockMvcRequestBuilders.get("/endpoint"))
+                .andReturn()
+                .getModelAndView();
+
+        // validate view name
+        Assert.assertSame(mv.getViewName(), "from-xml");
+    }
+
+}