JDK 1.6 + Spring Framework 4 사용 기초

1. 개요

다음과 같은 환경에서 Spring Framework 4 기반의 Hello World 프로그램을 작성하고 빌드하여 실행할 수 있도록 안내합니다.

도구	버전	설명
Windows	10	운영체제
JDK	1.6	Java 컴파일러 및 실행 환경
IntelliJ IDEA	2021.2.2 (Community Edition)	통합 개발 환경
Maven	3.2.5 (JDK 1.6에서 동작하는 마지막 버전)	빌드 도구
Spring Framework	4.3.30.RELEASE	응용 프레임워크

2. 준비

아래 블로그 글을 참고하여 프로젝트를 생성합니다.

• JDK 1.6 + Maven + IntelliJ 사용 기초

3. Spring Framework 사용

3.1. pom.xml

<?xml version="1.0" encoding="UTF-8"?>  
<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>org.example</groupId>  
    <artifactId>springframework4-study</artifactId>  
    <version>1.0-SNAPSHOT</version>  
    <dependencies>  
        <dependency>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-api</artifactId>  
            <version>1.7.32</version>  
        </dependency>  
        <dependency>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-classic</artifactId>  
            <version>1.2.10</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-beans</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-context</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-core</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
    </dependencies>  
  
    <properties>  
        <maven.compiler.source>6</maven.compiler.source>  
        <maven.compiler.target>6</maven.compiler.target>
        <spring.version>4.3.30.RELEASE</spring.version>
    </properties>  
  
</project>

3.2. applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"  
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
  xsi:schemaLocation="  
 http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">  
  
    <bean id="serviceExecutor" class="com.example.ServiceExecutor">  
    </bean>
    
</beans>

3.3. ServiceExecutor.java

package com.example;  
  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
  
public class ServiceExecutor {  
    private static Logger LOGGER = LoggerFactory.getLogger(ServiceExecutor.class);  
  
    private boolean keepRunning = true;  
  
    public void start() throws Exception {  
        LOGGER.info("Service is starting...");  
        LOGGER.info("Service started.");  
  
        int count = 0;  
        while (keepRunning) {  
            Thread.sleep(1000);  
            LOGGER.info("count " + ++count);  
        }  
    }  
  
    public void stop() throws Exception {  
        LOGGER.info("Service is stopping...");  
        keepRunning = false;  
        LOGGER.info("Service stopped.");  
    }  
}

3.4. HelloWorld.java

package com.example;  
  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
import org.springframework.beans.factory.BeanFactory;  
import org.springframework.context.support.ClassPathXmlApplicationContext;  
  
public class HelloWorld {  
    private static Logger LOGGER = LoggerFactory.getLogger(HelloWorld.class);  
  
    private BeanFactory beanFactory;  
  
    protected HelloWorld() {  
        initBeanFactory();  
    }  
  
    protected void initBeanFactory() {  
        beanFactory = new ClassPathXmlApplicationContext(  
                "classpath:applicationContext.xml"  
  );  
    }  
  
    protected void start() {  
        final ServiceExecutor serviceExecutor = beanFactory.getBean("serviceExecutor", ServiceExecutor.class);  
  
        Runtime.getRuntime().addShutdownHook(new Thread() {  
            @Override  
  public void run() {  
                try {  
                    LOGGER.info("Application is stopping...");  
                    serviceExecutor.stop();  
                    LOGGER.info("Application stopped.");  
                } catch (Exception e) {  
                    LOGGER.error(e.getMessage(), e);  
                }  
            }  
        });  
  
        try {  
            LOGGER.info("Application is starting...");  
            serviceExecutor.start();  
            LOGGER.info("Application started.");  
        } catch (Exception e) {  
            LOGGER.error(e.getMessage(), e);  
            System.exit(1);  
        }  
    }  
  
    public static void main(String[] args) {  
        LOGGER.info("Hello World!!!");  
  
        HelloWorld executor = new HelloWorld();  
        executor.start();  
    }  
}

4. 참고 자료

1. Spring Framework Versions - JDK Version Range

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