Java에서 Spring MVC '싱글톤' 범위를 사용하여 config.properties 값을 읽는 방법은 무엇입니까?
게시 됨: 2018-08-29
언젠가 나는 전통적인 방식으로 구성 파일을 읽는 방법에 대한 튜토리얼을 작성했습니다. 그러나 Spring MVC 프레임워크로 로드하고 싶다면 어떻게 해야 할까요?
Java 클래스에서 항상 일부 config.properties
값에 액세스해야 하는 경우가 가장 일반적입니다. Spring MVC의 싱글톤 범위를 사용하여 그것을 얻는 간단한 방법이 있다.
아래의 전체 작업 공간 사진을 살펴보십시오.
4개의 파일을 생성해야 합니다.
- com.crunchify.tutorial 패키지 아래의
com.crunchify.tutorial
-
/go/config/
폴더 아래의 config.properties 파일 -
/resources
폴더 아래의 spring-bean.xml 파일 - pom.xml 파일(프로젝트를 Maven 프로젝트로 변환)

시작하자:
1 단계
CrunchifyLoadPropertiesSpringMVC
라는 동적 웹 프로젝트 만들기

2 단계
프로젝트를 Maven 프로젝트로 변환합니다.
이것은 pom.xml
파일을 생성하고 Spring 종속성을 추가할 것입니다.

3단계
CrunchifySpringExample.java 파일 생성
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package com . crunchify . tutorial ; import org . springframework . beans . factory . annotation . Autowired ; import org . springframework . beans . factory . annotation . Value ; import org . springframework . context . annotation . Scope ; import org . springframework . context . support . ClassPathXmlApplicationContext ; import org . springframework . stereotype . Component ; /** * * @author Crunchify.com */ @Component ( "crunchifySpringExample" ) @Scope ( "singleton" ) public class CrunchifySpringExample { private static boolean springExample ; private static String springTutorial ; private static String url ; @Autowired public CrunchifySpringExample ( @Value ( "${CRUNCHIFY_URL}" ) String url , @Value ( "${SPRING_TUTORIAL}" ) String springTutorial , @Value ( "${IS_THIS_SPRING_EXAMPLE}" ) boolean springExample ) { CrunchifySpringExample . springExample = springExample ; CrunchifySpringExample . springTutorial = springTutorial ; CrunchifySpringExample . url = url ; } @SuppressWarnings ( { "resource" , "unused" } ) public static void main ( String [ ] args ) { try { ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext ( new String [ ] { "spring-bean.xml" } ) ; } catch ( Throwable e ) { System . out . println ( e ) ; } System . out . println ( "\nLoading Properties from Config File during application startup: \n\nSPRING_TUTORIAL: " + springTutorial ) ; System . out . println ( "IS_THIS_SPRING_EXAMPLE: " + springExample ) ; System . out . println ( "CRUNCHIFY_URL: " + url ) ; } } |
4단계
여기 내 pom.xml
파일이 있습니다.
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< project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns : xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi : schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > < modelVersion > 4.0.0 < / modelVersion > < groupId > CrunchifyLoadPropertiesSpringMVC < / groupId > < artifactId > CrunchifyLoadPropertiesSpringMVC < / artifactId > < version > 0.0.1 - SNAPSHOT < / version > < packaging > war < / packaging > < name > CrunchifyLoadPropertiesSpringMVC < / name > < build > < sourceDirectory > src < / sourceDirectory > < plugins > < plugin > < artifactId > maven - compiler - plugin < / artifactId > < version > 3.1 < / version > < configuration > < source > 1.7 < / source > < target > 1.7 < / target > < / configuration > < / plugin > < plugin > < artifactId > maven - war - plugin < / artifactId > < version > 2.3 < / version > < configuration > < warSourceDirectory > WebContent < / warSourceDirectory > < failOnMissingWebXml > false < / failOnMissingWebXml > < / configuration > < / plugin > < / plugins > < / build > < properties > < project . build . sourceEncoding > UTF - 8 < / project . build . sourceEncoding > < spring . version > 4.0.2.RELEASE < / spring . version > < / properties > < dependencies > < ! -- Spring base -- > < dependency > < groupId > org . springframework < / groupId > < artifactId > spring - aop < / artifactId > < version > $ { spring . version } < / version > < exclusions > < exclusion > < groupId > commons - logging < / groupId > < artifactId > commons - logging < / artifactId > < / exclusion > < / exclusions > < / dependency > < ! -- Spring MVC -- > < dependency > < groupId > org . springframework < / groupId > < artifactId > spring - webmvc < / artifactId > < version > $ { spring . version } < / version > < / dependency > < dependency > < groupId > org . springframework < / groupId > < artifactId > spring - web < / artifactId > < version > $ { spring . version } < / version > < / dependency > < dependency > < groupId > commons - logging < / groupId > < artifactId > commons - logging < / artifactId > < version > 1.1.1 < / version > < / dependency > < / dependencies > < / project > |
5단계
" resources
" 폴더가 보이지 않는 경우. 하나를 만듭니다.


6단계
아래 내용으로 config.properties
파일을 생성합니다.
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# Crunchify Properties IS_THIS_SPRING_EXAMPLE = true SPRING_TUTORIAL = CRUNCHIFY_TUTORIAL CRUNCHIFY_URL = https : //crunchify.com |
7단계
spring-bean.xml
파일 내용
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<? xml version = "1.0" encoding = "UTF-8" ?> < beans xmlns = "http://www.springframework.org/schema/beans" xmlns : util = "http://www.springframework.org/schema/util" xmlns : xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns : context = "http://www.springframework.org/schema/context" xsi : schemaLocation = " http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd" > < util : properties id = "nodeProperty" location = "classpath:config/config.properties" / > < context : property - placeholder properties - ref = "nodeProperty" / > < context : component - scan base - package = "com.crunchify.tutorial" / > < / beans > |
8단계
이제 CrunchifySpringExample.java
를 실행하면 다음과 같은 결과가 표시되어야 합니다.
9단계
산출
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Jul 05 , 2014 3 : 38 : 52 PM org . springframework . context . support . AbstractApplicationContext prepareRefresh INFO : Refreshing org . springframework . context . support . ClassPathXmlApplicationContext @ 7e3bfb66 : startup date [ Sat Jul 05 15 : 38 : 52 CDT 2014 ] ; root of context hierarchy Jul 05 , 2014 3 : 38 : 52 PM org . springframework . beans . factory . xml . XmlBeanDefinitionReader loadBeanDefinitions INFO : Loading XML bean definitions from class path resource [ spring - bean . xml ] Jul 05 , 2014 3 : 38 : 52 PM org . springframework . core . io . support . PropertiesLoaderSupport loadProperties INFO : Loading properties file from class path resource [ config / config . properties ] Loading Properties from Config File during application startup : SPRING_TUTORIAL : CRUNCHIFY_TUTORIAL IS_THIS_SPRING_EXAMPLE : true CRUNCHIFY_URL : https : //crunchify.com |
즐겁고 행복한 코딩..