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Spring) 페이지 나누기 - param변수, root-context/servlet-context/web.xml 설정

by 박채니 2022. 8. 17.

안녕하세요, 코린이의 코딩 학습기 채니 입니다.

 

개인 포스팅용으로 내용에 오류 및 잘못된 정보가 있을 수 있습니다.

페이지 나누기

header.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>${param.title}</title>

<script src="https://code.jquery.com/jquery-3.6.0.js" integrity="sha256-H+K7U5CnXl1h5ywQfKtSj8PCmoN9aaq30gDh27Xc0jk=" crossorigin="anonymous"></script>
<!-- bootstrap js: jquery load 이후에 작성할것.-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

<!-- bootstrap css -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" integrity="sha384-9gVQ4dYFwwWSjIDZnLEWnxCjeSWFphJiwGPXr1jddIhOegiu1FwO5qRGvFXOdJZ4" crossorigin="anonymous">

<!-- 사용자작성 css -->
<link rel="stylesheet" href="${pageContext.request.contextPath}/resources/css/style.css" />

</head>
<body>
<div id="container">
	<header>
		<div id="header-container">
			<h2>${param.title}</h2>
		</div>
		<!-- https://getbootstrap.com/docs/4.0/components/navbar/ -->
		<nav class="navbar navbar-expand-lg navbar-light bg-light">
			<a class="navbar-brand" href="#">
				<img src="${pageContext.request.contextPath}/resources/images/logo-spring.png" alt="스프링로고" width="50px" />
			</a>
			<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
				<span class="navbar-toggler-icon"></span>
		  	</button>
			<div class="collapse navbar-collapse" id="navbarNav">
				<ul class="navbar-nav mr-auto">
			    	<li class="nav-item"><a class="nav-link" href="${pageContext.request.contextPath}">Home</a></li>
                    <li class="nav-item"><a class="nav-link" href="${pageContext.request.contextPath}/board/boardList.do">게시판</a></li>
                    <!-- 데모메뉴 DropDown -->
                    <!--https://getbootstrap.com/docs/4.1/components/navbar/#supported-content-->
                    <li class="nav-item dropdown">
                        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                            Demo
                        </a>
                        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                            <a class="dropdown-item" href="${pageContext.request.contextPath}/demo/devForm.do">Dev 등록</a>
                            <a class="dropdown-item" href="${pageContext.request.contextPath}/demo/devList.do">Dev 목록</a>
                        </div>
				    </li>
			    </ul>
			    <button class="btn btn-outline-success my-2 my-sm-0" type="button" >로그인</button>
                &nbsp;
                <button class="btn btn-outline-success my-2 my-sm-0" type="button">회원가입</button>
			 </div>
		</nav>
	</header>
	<section id="content">

 

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<fmt:requestEncoding value="utf-8" />
<jsp:include page="/WEB-INF/views/common/header.jsp">
	<jsp:param name="title" value="헬로우 스프링" />
</jsp:include>

	<img src="${pageContext.request.contextPath }/resources/images/logo-spring.png" id="center-image" alt="스프링로고" class="d-block mx-auto mt-5"/>

<jsp:include page="/WEB-INF/views/common/footer.jsp"></jsp:include>

 

footer.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
</section>
	<footer>
		<p>&lt;Copyright 2017. <strong>코린이의 코딩 학습기</strong>. All rights reserved.&gt;</p>
	</footer>
	
</div>
</body>
</html>

<jsp:include> 태그를 이용하여 include처리를 해주었으며, 페이지마다 해당 하는 제목을 지정해주기 위하여 param 변수를 선언해주었습니다.

header.jsp에서 ${param.title}로 value를 가져왔으며, 한글도 처리해주기 위해 <fmt:requestEncoding>태그로 인코딩을 잡아주었습니다.

 

web.xml

	<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring/root-context.xml</param-value>
	</context-param>
	
	<!-- Creates the Spring Container shared by all Servlets and Filters -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- Processes application requests -->
	<servlet>
		<servlet-name>appServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

Spring Legacy는 기본적으로 2개 이상의 context를 가지고 있으며, root-context / servlet-context가 있습니다.

servlet 관련은 servlet-context에서 관리, DB관련(보안, 권한관리 등)은 root-context에서 관리하며, servlet-context에서 참조할 수 있습니다. 

다만, RootContext가 먼저 생성되므로 RootContext에서 ServletContext를 참조할 순 없습니다.

 

#2. root-context 설정파일 위치

#3. 단 하나의 servlet, DispatcherServlet 하위에서 빈을 관리하는 servlet-context

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- #1.2.1 servlet 버전과 web.xml 버전을 일치시킴 -->
<web-app 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" 
    id="WebApp_ID" 
    version="4.0">
	
	<!-- #2 root-context 설정파일위치 -->
	<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring/root-context.xml</param-value>
	</context-param>
	
	<!-- Creates the Spring Container shared by all Servlets and Filters -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- #3 단 하나의 servlet, DispatcherServlet 하위에서 빈을 관리하는 servlet-context -->
	<!-- Processes application requests -->
	<servlet>
		<servlet-name>appServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
		
	<servlet-mapping>
		<servlet-name>appServlet</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>

</web-app>

<servlet>태그는 DispatcherServlet에 대한 설정파일!

<url-pattern>을 확인해보면 '/'로 되어있고, 이는 '/'로 들어오는 모든 요청을 처리합니다. (정적파일 자원요청까지 처리!)

'/'로 들어오는 요청을 Spring에서 만든 DispatcherServlet에서 처리하게 되고, Controller로 넘겨줍니다.

 

servlet-context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:beans="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd
		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

	<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
	
	<!-- Enables the Spring MVC @Controller programming model -->
	<annotation-driven />

	<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
	<resources mapping="/resources/**" location="/resources/" />

	<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
	<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/views/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>
	
	<context:component-scan base-package="com.ce.spring2" />
	
	
	
</beans:beans>

xmlns뒤에 아무것도 붙어있지 않은 것이 기본 네임스페이스 → mvc

따라서 <annotation-driven>, <resources>는 mvc의 annotation-driven, resources를 의미합니다.

 

beans:bean → view단을 핸들러가 리턴하게 되면 앞에는 '/WEB-INF/views/', 뒤에는 '.jsp'를 붙여서 forwarding을 준비

context:component-scan → base-package하위에 @Component 클래스를 bean으로 자동 등록

annotation-driven → MVC처리를 관련 일 처리 태그

resources → '/resources/**' resources로 시작하여 몇 개의 계층인 지 따지지 않고 요청이 들어왔을 때 location='/resources/' 에서 찾아라!는 의미

 

#4. encoding Filter

web.xml

<!-- #4. encoding Filter -->
<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>utf-8</param-value>
    </init-param>
    <init-param> 
           <param-name>forceEncoding</param-name> 
           <param-value>true</param-value> 
    </init-param>
</filter>
  <filter-mapping>
      <filter-name>encodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>

모든 url에 대하여 'utf-8'으로 인코딩 필터를 적용해주었습니다.

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