Java xml 이용

예시1

// PersonService 인터페이스
package com.spring.ex01;

public interface PersonService {
	public void sayHello();
}

// PersonServiceImpl 구현 클래스
package com.spring.ex01;

public class PersonServiceImpl implements PersonService {

	private String name;
	private int age;
	
	public void setName(String name) {
		this.name = name;
	}
	
	@Override
	public void sayHello() {
		System.out.println("이름 : " + name);
		System.out.println("나이 : " + age);
	}
}

// PersonTest 메인 클래스
package com.spring.ex01;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;

public class PersonTest {
	public static void main(String[] args) {
		BeanFactory factory = new XmlBeanFactory(new FileSystemResource("person.xml"));
		PersonService person = (PersonService) factory.getBean("personService");
		// PersonService person = new PersonServiceImpl();
		person.sayHello();
	}
}

<!-- person.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 https://www.springframework.org/schema/beans/spring-beans.xsd">

   <bean id="personService" class="com.spring.ex01.PersonServiceImpl">
      <property name="name">
         <value>홍길동</value>
      </property>
   </bean>
  
<!--
   <bean id="personService1" class="com.spring.ex02.PersonServiceImpl">
        <constructor-arg value="이순신"/>
   </bean>
   
   <bean id="personService2" class="com.spring.ex02.PersonServiceImpl">
       <constructor-arg value="손흥민"/>
       <constructor-arg value="23"/>
   </bean>
-->
</beans>

 

 

 

 

예시2

//PersonService 인터페이스
package com.spring.ex02;

public interface PersonService {
	public void sayHello();
}

//PersonServiceImple 구현 클래스
package com.spring.ex02;

public class PersonServiceImpl implements PersonService {

	private String name;
	private int age;
	
	public PersonServiceImpl(String name) {
		this.name = name;
	}

	public PersonServiceImpl(String name, int age) {
		this.name = name;
		this.age = age;
	}
	
	@Override
	public void sayHello() {
		System.out.println("이름 : " + name);
		System.out.println("나이 : " + age);
	}
}

//PersonTest2 메인 클래스
package com.spring.ex02;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;

public class PersonTest2 {
	public static void main(String[] args) {
		BeanFactory factory = new XmlBeanFactory(new FileSystemResource("person.xml"));
		PersonService person1 = (PersonService) factory.getBean("personService1");
		person1.sayHello();
		System.out.println();
		
		PersonService person2 = (PersonService) factory.getBean("personService2");
		person2.sayHello();
		
	}
}

<!-- person.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 https://www.springframework.org/schema/beans/spring-beans.xsd">

  <!--
   <bean id="personService" class="com.spring.ex01.PersonServiceImpl">
      <property name="name">
         <value>홍길동</value>
      </property>
   </bean>
  -->
    
   <bean id="personService1" class="com.spring.ex02.PersonServiceImpl">
        <constructor-arg value="이순신"/>
   </bean>
   
   <bean id="personService2" class="com.spring.ex02.PersonServiceImpl">
       <constructor-arg value="손흥민"/>
       <constructor-arg value="23"/>
   </bean>
	
</beans>

 

 

 

 

예시3

// MemberDAO 인터페이스
package com.spring.ex03;

public interface MemberDAO {
	public void listMembers();
}

// MemberDAOImpl 구현 클래스
package com.spring.ex03;

public class MemberDAOImpl implements MemberDAO {

	@Override
	public void listMembers() {
		System.out.println("listMembers 메소드 호출");
		System.out.println("회원정보를 조회합니다.");
	}

}

// MemberService 인터페이스
package com.spring.ex03;

public interface MemberService {
	public void listMembers();
}

//MemberServiceImple 구현 클래스
package com.spring.ex03;

public class MemberServiceImpl implements MemberService {
	private MemberDAO memberDAO;
	
	public void setMemberDAO(MemberDAO memberDAO) {
		this.memberDAO = memberDAO;
	}

	@Override
	public void listMembers() {
		memberDAO.listMembers();
	}

}

// MemberTest1 메인 클래스
package com.spring.ex03;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;

public class MemberTest1 {
	public static void main(String[] args) {
		BeanFactory factory = new XmlBeanFactory(new FileSystemResource("member.xml"));
		MemberService service = (MemberService) factory.getBean("memberService");
		service.listMembers();
		
	}
}

<!-- member.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 https://www.springframework.org/schema/beans/spring-beans.xsd">

	<bean id="memberService" class="com.spring.ex03.MemberServiceImpl">
		<property name="memberDAO" ref="memberDAO"/>
	</bean>
	<bean id="memberDAO" class="com.spring.ex03.MemberDAOImpl"/>
	<!-- MemberDAOImpl memberDAO = new MemberDAOImpl() 이랑 같은 말 -->
</beans>