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Spring_다형성을 이용한 코드 작성 본문
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- 다형성을 이용
- src > main > webapp > WEB-INF > web.xml 파일에서 내용을 삭제합니다.
- 삭제하고 남은 내용
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<?xml version="1.0" encoding="UTF-8"?>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
https://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> </web-app>
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- src > pom.xml 파일
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<?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"
<modelVersion>4.0.0</modelVersion>
<groupId>basic.spring</groupId>
<artifactId>myWeb</artifactId>
<name>myboard</name>
<packaging>war</packaging>
<version>1.0.0-BUILD-SNAPSHOT</version>
<properties>
<!-- 자바 버전을 변경합니다. -->
<java-version>11</java-version>
<!-- 스프링 프레임워크 버전을 변경합니다. 원래 3.1.1 현재 5.3.27-->
<org.springframework-version>5.3.27</org.springframework-version>
<org.aspectj-version>1.9.19</org.aspectj-version>
<org.slf4j-version>2.0.7</org.slf4j-version>
</properties>
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<!-- AspectJ -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${org.aspectj-version}</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
<exclusion>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
</exclusion>
<exclusion>
<groupId>javax.jms</groupId>
<artifactId>jms</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
</exclusions>
<scope>runtime</scope>
</dependency>
<!-- @Inject -->
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<!-- 변경 하기 -->
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
<!-- 변경 하기 : 원래 jsp-api 현재 javax.servlet.jsp-api -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- 변경 하기 4.12 버전 이상-->
<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-eclipse-plugin</artifactId>
<!-- 2.10 버전이 있으나 아무도 사용하지 않으므로 결함이 있다는 의미입니다. 그대로 사용합니다. -->
<version>2.9</version>
<configuration>
<additionalProjectnatures>
<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
</additionalProjectnatures>
<additionalBuildcommands>
<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
</additionalBuildcommands>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<!-- 기본 2.5.1입니다. 현재 3.10.1 으로 변경합니다. -->
<version>3.10.1</version>
<configuration>
<!-- Java 버전이므로 11로 변경해야 합니다. -->
<source>11</source>
<target>11</target>
<compilerArgument>-Xlint:all</compilerArgument>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<!-- 실행 파일입니다. 기본 1.2.1 현재 3.1.0 으로 변경합니다.-->
<version>3.1.0</version>
<configuration>
<mainClass>org.test.int1.Main</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
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- sts.spring.ioc > 'TV.java' 인터페이스를 생성합니다.
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package sts.spring.ioc;
public interface TV {
public void powerOn();
public void powerOff();
public void volumeUp();
public void volumeDown();
}
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cs |
- 두 개의 하위 클래스를 생성하여 비교합니다.
- sts.spring.ioc > 'SamsungTV.java' 클래스를 생성합니다.
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package sts.spring.ioc;
public class SamsungTV implements TV {
public SamsungTV() {
System.out.println("[ Create SamsungTV ]");
}
@Override
public void powerOn() {
System.out.println("SamsungTV powerOn");
}
@Override
public void powerOff() {
System.out.println("SamsungTV powerOff");
}
@Override
public void volumeUp() {
System.out.println("SamsungTV volumeUp");
}
@Override
public void volumeDown() {
System.out.println("SamsungTV volumeDown");
}
}
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- sts.spring.ioc > 'LgTV.java' 클래스를 생성합니다.
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package sts.spring.ioc;
public class LgTV implements TV{
@Override
public void powerOn() {
System.out.println("LgTV powerOn");
}
@Override
public void powerOff() {
System.out.println("LgTV powerOff");
}
@Override
public void volumeUp() {
System.out.println("LgTV volumeUp");
}
@Override
public void volumeDown() {
System.out.println("LgTV volumeDown");
}
}
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- sts.spring.ioc > 'TVUser.java' 클래스를 생성합니다.
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package sts.spring.ioc;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
public class TVUser {
public static void main(String[] args) {
// Spring 컨테이너를 구동합니다.
AbstractApplicationContext fac = new GenericXmlApplicationContext("applicationContext.xml");
// Spring 컨테이너에 등록한 객체를 요청합니다.
TV samsungTV = (TV) fac.getBean("samsungTV");
samsungTV.powerOn();
samsungTV.volumeUp();
samsungTV.volumeDown();
samsungTV.powerOff();
System.out.println();
TV lgTV = (TV) fac.getBean("lgTV");
lgTV.powerOn();
lgTV.volumeUp();
lgTV.volumeDown();
lgTV.powerOff();
// Spring 컨테이너를 종료합니다.
fac.close();
/*
SamsungTV powerOn
SamsungTV volumeUp
SamsungTV volumeDown
SamsungTV powerOff
LgTV powerOn
LgTV volumeUp
LgTV volumeDown
LgTV powerOff
*/
}
}
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