[SPRING]#45 도서 쇼핑몰 구현 (다국어 처리2)

MessageSource를 이용하여 다국어 처리

앞서 배운 MessageSource를 이용해서 도서 등록 페이지의 폼 필드 이름을

다국어로 처리하여 출력해봅니다.

---

servlet-context.xml

MessageSource 구현체의 빈 객체를 등록합니다.

<?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 enable-matrix-variables="true"/>

	<!-- 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.springmvc.*" />
	
	<beans:bean id="multipartResolver"
				class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<beans:property name="maxUploadSize" value="10240000"/>			
	</beans:bean>
	
	<beans:bean id="messageSource"
				class="org.springframework.context.support.ResourceBundleMessageSource">
		<beans:property name="basename" value="messages"/>
		<beans:property name="defaultEncoding" value="UTF-8"/>			
	</beans:bean>
	
	<interceptors>
		<beans:bean class="com.springmvc.interceptor.MonitoringInterceptor"/>
		<beans:bean class="com.springmvc.interceptor.AuditingInterceptor"/>
	</interceptors>
	
</beans:beans>

ResourceBundleMessageSource 클래스를 등록합니다.

메시지 리소스 파일은 mesages.properties가 됩니다.

한글을 출력하기 위해 인코딩은 UTF-8로 설정합니다.

---

messages_ko.properties

src/main/resources 폴더에 파일을 생성하고 다음과 같이 작성해줍니다.

addBook.form.title.label = \uB3C4\uC11C \uB4F1\uB85D
addBook.form.subtitle.label = \uC2E0\uADDC \uB3C4\uC11C \uB4F1\uB85D
addBook.form.bookId.label = \uB3C4\uC11CID
addBook.form.name.label = \uB3C4\uC11C\uBA85
addBook.form.unitPrice.label = \uAC00\uACA9
addBook.form.author.label = \uC800\uC790
addBook.form.description.label = \uC0C1\uC138\uC815\uBCF4
addBook.form.publisher.label = \uCD9C\uD310\uC0AC
addBook.form.category.label = \uBD84\uB958
addBook.form.unitsInStock.label = \uC7AC\uACE0\uC218
addBook.form.releaseDate.label = \uCD9C\uD310\uC77C
addBook.form.condition.label = \uC0C1\uD0DC
addBook.form.bookImage.label = \uB3C4\uC11C\uC774\uBBF8\uC9C0
addBook.form.button.label = \uB4F1\uB85D

---

messages_en.properties

src/main/resources 폴더에 파일을 생성하고 다음과 같이 작성해줍니다.

addBook.form.title.label = Book Addition
addBook.form.subtitle.label = New Book Registration
addBook.form.bookId.label = Book ID
addBook.form.name.label = Name
addBook.form.unitPrice.label = Unit Price
addBook.form.author.label = Author
addBook.form.description.label = Description
addBook.form.publisher.label = Publisher
addBook.form.category.label = Category
addBook.form.unitsInStock.label = Units in Stock
addBook.form.releaseDate.label = Release Date
addBook.form.condition.label = Condition
addBook.form.bookImage.label = Book Image
addBook.form.button.label = Addition

---

addBook.jsp

다국어 처리를 하기 위해서 <spring:message> 태그를 다음과 같이 수정해줍니다.

<%@ page contentType="text/html; charset=utf-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<html>
<head>
<link href="<c:url value="/resources/css/bootstrap.min.css"/>" rel="stylesheet">
<title>도서 등록</title>
</head>
<body>
	<nav class="navbar navbar-expand navbar-dark bg-dark">
		<div class="container">
			<div class="navbar-header">
				<a class="navbar-brand" href="./home">Home</a>
			</div>
		</div>
	</nav>
	<div class="jumbotron">
		<div class="container">
			<h1 class="display-3">
				<spring:message code="addBook.form.title.label"/>
			</h1>
		</div>
	</div>
	<div class="container">
		<div class="float-right">
			<form:form action="${pageContext.request.contextPath }/logout" method="POST">
				<input type="submit" class="btn btn-sm btn-success" value="Logout" />
			</form:form>
		</div>
		<br><br>
		<form:form modelAttribute="NewBook" 
					action="./add?${_csrf.parameterName }=${_csrf.token }"
					class="form-horizontal"
					enctype="multipart/form-data">
		<fieldset>
		<legend><spring:message code="addBook.form.subtitle.label"/></legend>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.bookId.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="bookId" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.name.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="name" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.unitPrice.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="unitPrice" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.author.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="author" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.description.label"/>
			</label>
			<div class="col-sm-5">
				<form:textarea path="description" cols="50" rows="2" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.publisher.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="publisher" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.category.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="category" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.unitsInStock.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="unitsInStock" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.releaseDate.label"/>
			</label>
			<div class="col-sm-3">
				<form:input path="releaseDate" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.condition.label"/>
			</label>
			<div class="col-sm-3">
				<form:radiobutton path="condition" value="New"/>New
				<form:radiobutton path="condition" value="Old"/>Old
				<form:radiobutton path="condition" value="E-Book"/>E-Book
			</div>
		</div>
		<div class="form-group row">
			<label class="col-sm-2 control-label">
				<spring:message code="addBook.form.bookImage.label"/>
			</label>
			<div class="col-sm-7">
				<form:input path="bookImage" type="file" class="form-control"/>
			</div>
		</div>
		<div class="form-group row">
			<div class="col-sm-offset-2 col-sm-10">
				<input type="submit" class="btn btn-primary" value="<spring:message code="addBook.form.button.label"/>" />
			</div>
		</div>
		</fieldset>
		</form:form>
		<hr>
	<footer>
		<p>&copy; BookMarket</p>
	</footer>
	</div>
</body>
</html>

<spring:message> 태그를 사용하기 위해 스프링 태그 라이브러리를 선언하고

messages.properties 파일에서 폼 필드에 해당하는 값의 메시지를 읽어 와서 출력합니다.

---

실행 결과

/books/add를 입력합니다.

 

로케일이 한국인 경우입니다.

 

 

 

다음은 로케일이 영어인 경우입니다.