Spring_Spring DI_컬렉션 타입_ 컬렉션 객체 설정

- 컬렉션 객체 설정
              - 태그 목록
                     - : 다른 스프링 빈 객체를 값으로 사용합니다.
                     - : 임의의 빈 객체를 생성하여 값으로 사용합니다.
                     - : 래퍼 타입이나 String을 값으로 사용합니다.
                     - <list>, <map>, <props>, <set> : 컬렉션 객체를 값으로 사용합니다.
                     -   : null 레퍼런스를 값으로 사용합니다.
      - <list>
              - 리스트 타입, 배열에 값 목록을 전달할 때 사용합니다.
        - <map>
                - Map 타입에 <키, 값> 목록을 전달할 때 사용합니다.
        - <set>
                - set 타입에 값 목록을 전달할 때 사용합니다.
        - <props>
                - properties 타입에 <프로퍼티 이름, 프로퍼티 값> 목록을 전달할 때 사용합니다.

- <List> 타입과 배열
- sts.spring.list 패키지 생성 > CollectionBean.java 클래스를 생성합니다.
=====

package sts.spring.list;
 
import java.util.List;
 
public class CollectionBean {
    private List<String> addressList;
    
    public List<String> getAddressList(){
        return addressList;
    }
    
    public void setAddressList(List<String> addressList) {
        this.addressList = addressList;
    }
}
 

- applicationContext.xml 파일에 bean 객체를 등록합니다.
=====

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:c="http://www.springframework.org/schema/c"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
 
    <!-- sts.spring.list -->
    <bean id="collectionBean" class="sts.spring.list.CollectionBean">
        <property name="addressList">
            <list>
                <value>Seoul</value>
                <value>Busan</value>
            </list>
        </property>
    </bean>
 
</beans>
 

- sts.spring.list > CollectionBeanClient.java 클래스를 생성합니다.
=====

package sts.spring.list;
 
import java.util.List;
 
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
 
public class CollectionBeanClient {
    public static void main(String[] args) {
        
        AbstractApplicationContext fac  = new GenericXmlApplicationContext("applicationContext.xml");
        // applicationContext.xml에서 설정한 bean id
        CollectionBean bean = (CollectionBean) fac.getBean("collectionBean");
        
        List<String> addressList = bean.getAddressList();
        
        for(String addr : addressList) {
            System.out.println(addr.toString());
        }
        
        // 컨테이너 종료
        fac.close();
        
            /*
                Seoul
                Busan
             */
    }
}
 

- <map> 타입
- sts.spring.map 패키지 생성 > CollectionBean.java 클래스 생성
=====

package sts.spring.map;
 
import java.util.Map;
 
public class CollectionBean {
    
    private Map<String, String> addressList;
    
    public Map<String, String> getAddressList(){
        return addressList;
    }
 
    public void setAddressList(Map<String, String> addressList) {
        this.addressList = addressList;
    }
}
 

- applicaionContext.xml 파일 수정
=====

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:c="http://www.springframework.org/schema/c"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
 
    <!-- sts.spring.map -->
<!-- 다른 스프링 빈 객체를 키로 사용한다?    <ref bean="restHandler"/> -->
<!-- 한 개의 entry 태그는 map에 저장되는 하나의 키,값을 표현합니다.    -->
    <bean name="collectionBean" class="sts.spring.map.CollectionBean">
        <property name="addressList">
            <map>
                <entry>
                    <key><value>Person 1</value></key>
                    <value>Seoul</value>
                </entry>
                <entry>
                    <key><value>Person 2</value></key>
                    <value>Busan</value>
                </entry>
            </map>
        </property>
    </bean> 
 
    
</beans>
 

- CollectionBeanClient.java 클래스 생성
=====

package sts.spring.map;
 
import java.util.Map;
 
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
 
public class CollectionBeanClient {
    public static void main(String[] args) {
        
        AbstractApplicationContext fac  = new GenericXmlApplicationContext("applicationContext.xml");
        // applicationContext.xml에서 설정한 bean id
        CollectionBean bean = (CollectionBean) fac.getBean("collectionBean");
        
        Map<String, String> addressList = bean.getAddressList();
        
        for(String key : addressList.keySet()) {
            System.out.println(String.format("%s : %s ", key, addressList.get(key)));
        }
        
        // 컨테이너 종료
        fac.close();
        
            /*
                Person 1 : Seoul 
                Person 2 : Busan 
             */
    }
}
 

- <properties>
- sts.spring.property 패키지 생성 > CollectionBean.java 클래스 생성
=====

package sts.spring.property;
 
import java.util.Properties;
 
public class CollectionBean {
    
    private Properties addressList;
 
    public Properties getAddressList() {
        return addressList;
    }
 
    public void setAddressList(Properties addressList) {
        this.addressList = addressList;
    }
}
 

- applicationContext.xml 파일 수정
=====

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:c="http://www.springframework.org/schema/c"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
 
<!-- sts.spring.property     -->
    <bean id="collectionBean" class="sts.spring.property.CollectionBean">
        <property name="addressList">
            <props>
                <prop key="person3">Seoul</prop>
                <prop key="person4">Busan</prop>
            </props>
        </property>
    </bean>
 
</beans>

- sts.spring.property > CollectionBeanClient.java 클래스 생성
=====

package sts.spring.property;
 
import java.util.Properties;
 
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
 
public class CollectionBeanClient {
    public static void main(String[] args) {
        
        AbstractApplicationContext fac = new GenericXmlApplicationContext("applicationContext.xml");
        
        // applicationContext.xml에서 설정한 bean id
        CollectionBean bean = (CollectionBean) fac.getBean("collectionBean");
        
        Properties addressList = bean.getAddressList();
        
        for(String key : addressList.stringPropertyNames()) {
            System.out.println(String.format("%s : %s ", key, addressList.get(key)));
        }
        
        // 컨테이너 종료
        fac.close();
        
            /*
                Person 3 : Seoul 
                Person 4 : Busan 
             */
    }
}
 

- <set>
- sts.spring.set 패키지 생성 > CollectionBean.java 클래스 생성
=====

package sts.spring.set;
 
import java.util.Set;
 
public class CollectionBean {
    
    private Set<String> addressList;
 
    public Set<String> getAddressList() {
        return addressList;
    }
 
    public void setAddressList(Set<String> addressList) {
        this.addressList = addressList;
    }
}
 

- applicationContext.xml 파일 수정
=====

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:c="http://www.springframework.org/schema/c"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
 
<!-- sts.spring.set     -->
    <bean id="collectionBean" class="sts.spring.set.CollectionBean">
        <property name="addressList">
            <set value-type="java.lang.String">
                <value>Seoul</value>
                <value>Busan</value>
                <value>Jeju</value>
            </set>
        </property>
    </bean>
 
</beans>
 

- sts.spring.set > CollectionBeanClient.java 클래스 생성
=====

package sts.spring.set;
 
import java.util.Set;
 
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
 
public class CollectionBeanClient {
    public static void main(String[] args) {
        
        AbstractApplicationContext fac = new GenericXmlApplicationContext("applicationContext.xml");
        
        // applicationContext.xml에서 설정한 bean id
        CollectionBean bean = (CollectionBean) fac.getBean("collectionBean");
        
        Set<String> addressList = bean.getAddressList();
        
        for(String key : addressList) {
            System.out.println(key);
        }
        
        // 컨테이너 종료
        fac.close();
        
            /*
                Seoul
                Busan
                Jeju
             */
    }
}