Gradle + Spring 사용 기초

사용 환경

• Windows 10
• Java 1.8
• Gradle 7.2
• Spring 5.0.6

Hello 프로젝트 따라하기

1. 프로젝트 생성

   >gradle init
   

   선택 항목

   Starting a Gradle Daemon (subsequent builds will be faster)
   
   Select type of project to generate:
     1: basic
     2: application
     3: library
     4: Gradle plugin
   Enter selection (default: basic) [1..4] 2
   
   Select implementation language:
     1: C++
     2: Groovy
     3: Java
     4: Kotlin
     5: Scala
     6: Swift
   Enter selection (default: Java) [1..6] 3
   
   Split functionality across multiple subprojects?:
     1: no - only one application project
     2: yes - application and library projects
   Enter selection (default: no - only one application project) [1..2] 1
   
   Select build script DSL:
     1: Groovy
     2: Kotlin
   Enter selection (default: Groovy) [1..2] 1
   
   Select test framework:
     1: JUnit 4
     2: TestNG
     3: Spock
     4: JUnit Jupiter
   Enter selection (default: JUnit Jupiter) [1..4] 1
   
   Project name (default: hello-gradle): hello
   Source package (default: hello): trvoid
   
   > Task :init
   Get more help with your project: https://docs.gradle.org/7.2/samples/sample_building_java_applications.html
   

   생성된 프로젝트 폴더 구조는 아래와 같습니다.

   hello
     |-app
       |-src
         |-main
           |-java
             |-trvoid
               |-App.java
           |-resources
         |-test
           |-java
             |-trvoid
               |-AppTest.java
           |-resources
       |-build.gradle
     |-gradle
       |-wrapper
         |-gradle-wrapper.jar
         |-gradle-wrapper.properties
     |-gradlew
     |-gradlew.bat
     |-settings.gradle
   

2. 의존성 추가

   app/build.gradle

   implementation 'org.springframework:spring-core:5.0.6.RELEASE'
   implementation 'org.springframework:spring-context:5.0.6.RELEASE'
   

3. 서비스 추가

   app/src/main/java/trvoid/HelloManager.java

   package trvoid;
   
   public interface HelloManager {
       public String getServiceName();
   }
   

   app/src/main/java/trvoid/HelloManagerImpl.java

   package trvoid;
   
   public class HelloManagerImpl implements HelloManager {
       @Override
       public String getServiceName() {
           return "My Hello Service";
       }
   }
   

4. 빈 추가

   app/src/main/java/trvoid/AppConfig.java

   package trvoid;
   
   import org.springframework.context.annotation.Bean;
   import org.springframework.context.annotation.Configuration;
   
   @Configuration
   public class AppConfig {
       @Bean(name="helloService")
       public HelloManager getHelloManager() {
           return new HelloManagerImpl();
       }
   }
   

5. 메인 클래스 수정

   app/src/main/java/trvoid/App.java

   package trvoid;
   
   import org.springframework.context.ApplicationContext;
   import org.springframework.context.annotation.AnnotationConfigApplicationContext;
   
   public class App {
       public static void main(String[] args) {
           ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
           
           HelloManager hello = (HelloManager)context.getBean("helloService");
           
           System.out.println(hello.getServiceName());
       }
   }
   

6. 빌드

   >gradlew build
   

7. 실행

   >gradlew run
   

   실행 결과

   > Task :app:run
   9월 07, 2021 11:29:27 오전 org.springframework.context.support.AbstractApplicationContext prepareRefresh
   정보: Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@45ff54e6: startup date [Tue Sep 07 11:29:27 KST 2021]; root of context hierarchy
   My Hello Service
   
   BUILD SUCCESSFUL in 6s
   2 actionable tasks: 2 executed
   

Written with StackEdit.