Spring framework home.jsp 구동 과정과 web.xml, servlet-context.xml은 무엇인가?

 1<?xml version="1.0" encoding="UTF-8"?>
 2<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
 3  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
 5                      http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 6
 7  <!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
 8
 9  <context-param>
10    <param-name>contextConfigLocation</param-name>
11    <!-- 스프링의 환경설정 파일인 root-context.xml을 가장 먼저 참조한다-->
12    <param-value>/WEB-INF/spring/root-context.xml</param-value>
13  </context-param>
14
15  <!-- Creates the Spring Container shared by all Servlets and Filters -->
16  <listener>
17    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
18  </listener>
19
20  <!-- Processes application requests -->
21  <servlet>
22    <servlet-name>appServlet</servlet-name>
23    <!-- 스프링에 내장된 서블릿 클래스-->
24    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
25    <init-param>
26      <param-name>contextConfigLocation</param-name>
27      <!-- /WEB-INF/spring/appServlet/servlet-context.xml을 참조 -->
28      <!-- xml 파일 안에 정의된 객체들을 로딩한다. -->
29      <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
30    </init-param>
31    <!-- 가장 첫번째 우선순위를 뜻한다. -->
32    <load-on-startup>1</load-on-startup>
33  </servlet>
34
35  <servlet-mapping>
36    <servlet-name>appServlet</servlet-name>
37    <url-pattern>/</url-pattern>
38    <!-- DispatcherServlet이 모든 요청을 가로챌 수 있도록 등록 -->
39    <!-- 특정 url으로 변경하여 사용가능 ex) *.do -->
40  </servlet-mapping>
41</web-app>

1<?xml version="1.0" encoding="UTF-8"?>
2<beans xmlns="http://www.springframework.org/schema/beans"
3  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4  xsi:schemaLocation="http://www.springframework.org/schema/beans
5  http://www.springframework.org/schema/beans/spring-beans.xsd">
6  <!-- Root Context: defines shared resources visible to all other web components -->
7</beans>

 1<?xml version="1.0" encoding="UTF-8"?>
 2<beans:beans xmlns="http://www.springframework.org/schema/mvc"
 3  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4  xmlns:beans="http://www.springframework.org/schema/beans"
 5  xmlns:context="http://www.springframework.org/schema/context"
 6  xsi:schemaLocation="http://www.springframework.org/schema/mvc
 7    http://www.springframework.org/schema/mvc/spring-mvc.xsd
 8    http://www.springframework.org/schema/beans
 9    http://www.springframework.org/schema/beans/spring-beans.xsd
10    http://www.springframework.org/schema/context
11    http://www.springframework.org/schema/context/spring-context.xsd">
12
13  <!-- DispatcherServlet Context: defines this servlet's
14      request-processing infrastructure -->
15
16  <!-- Enables the Spring MVC @Controller programming model -->
17
18  <!-- 애노테이션을 사용가능하도록 설정 -->
19  <annotation-driven />
20
21  <!-- Handles HTTP GET requests for /resources/** by efficiently serving up
22        static resources in the ${webappRoot}/resources directory -->
23  <resources mapping="/resources/**" location="/resources/" />
24
25  <!-- Resolves views selected for rendering by @Controllers to .jsp
26        resources in the /WEB-INF/views directory -->
27  <!-- view resolver(뷰리졸버, 뷰 해석기) -->
28  <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
29    <!-- 뷰(jsp)의 접두어, 접미어 설정 : 파일명만 작성할 수 있게 세팅 -->
30    <!-- 접두어(Directory) -->
31    <beans:property name="prefix" value="/WEB-INF/views/" />
32    <!-- 접미어(확장자) -->
33    <beans:property name="suffix" value=".jsp" />
34  </beans:bean>
35</beans:beans>

 1package com.chris.springmvcproj;
 2
 3import java.text.DateFormat;
 4import java.util.Date;
 5import java.util.Locale;
 6
 7import org.slf4j.Logger;
 8import org.slf4j.LoggerFactory;
 9import org.springframework.stereotype.Controller;
10import org.springframework.ui.Model;
11import org.springframework.web.bind.annotation.RequestMapping;
12import org.springframework.web.bind.annotation.RequestMethod;
13
14// Controller 애노테이션
15@Controller
16public class HomeController {
17
18  private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
19
20  // url mapping
21  // 기본, 루트 페이지 => home메서드 호출
22  @RequestMapping(value = "/", method = RequestMethod.GET)
23  public String home(Locale locale, Model model) {
24    logger.info("Welcome home! The client locale is {}.", locale);
25
26    Date date = new Date();
27    DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG,
28                                                        DateFormat.LONG, locale);
29
30    String formattedDate = dateFormat.format(date);
31
32    // 모델(서블릿의 request 객체를 대체한 것)
33    model.addAttribute("serverTime", formattedDate );
34
35    // home.jsp로 포워딩
36    // servlet-context.xml
37    // <beans:property name="prefix" value="/WEB-INF/views/" />
38    // <beans:property name="suffix" value=".jsp" />
39    // Directory(접두어)와 jsp(접미어)확장자를 제외하고 이름만 작성하도록 세팅
40    return "home";
41  }
42}