[Spring] Xml Java vs XML

공통 코드

xml 과 java식 공통 코드

 

Student.java

package com.day02.Ex01.Java;

import java.util.*;

public class Student {

	private String name;
	private int age;
	private ArrayList<String> hobbys;
	private double height;
	private double weight;
	
	
	
	public Student(String name, int age, ArrayList<String> hobbys) {
		this.name = name;
		this.age = age;
		this.hobbys = hobbys;
	}
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public ArrayList<String> getHobbys() {
		return hobbys;
	}
	public void setHobbys(ArrayList<String> hobbys) {
		this.hobbys = hobbys;
	}
	public double getHeight() {
		return height;
	}
	public void setHeight(double height) {
		this.height = height;
	}
	public double getWeight() {
		return weight;
	}
	public void setWeight(double weight) {
		this.weight = weight;
	}
}

 

StudentInfo.java

 

package com.day02.Ex01.Java;

public class StudentInfo {

	private Student student;

	public StudentInfo() {
	}

	public Student getStudent() {
		return student;
	}

	public void setStudent(Student student) {
		this.student = student;
	}
}

 

Family.java

package com.day02.Ex01.Java;

public class Family {

	String papaName;
	String mamiName;
	String sisterName;
	String brotherName;
	
	
	public Family(String papaName, String mamiName) {
		this.papaName = papaName;
		this.mamiName = mamiName;
	}
	
	public String getPapaName() {
		return papaName;
	}
	public void setPapaName(String papaName) {
		this.papaName = papaName;
	}
	public String getMamiName() {
		return mamiName;
	}
	public void setMamiName(String mamiName) {
		this.mamiName = mamiName;
	}
	public String getSisterName() {
		return sisterName;
	}
	public void setSisterName(String sisterName) {
		this.sisterName = sisterName;
	}
	public String getBrotherName() {
		return brotherName;
	}
	public void setBrotherName(String brotherName) {
		this.brotherName = brotherName;
	}
}

 

 

Java 방식

Java 방식

 

ApplicationConfig.java

package com.day02.Ex01.Java;

import java.util.ArrayList;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ApplicationConfig {

	@Bean
	public Student student1()
	{
		ArrayList<String> hobby = new ArrayList<String>();
		hobby.add("수영");
		hobby.add("요리");
		
		Student student = new Student("홍길동", 20, hobby);
		student.setHeight(80);
		student.setWeight(180);
		
		return student;
	}
	
	@Bean
	public StudentInfo sutudentInfo1()
	{
		StudentInfo studentInfo = new StudentInfo();
		
		studentInfo.setStudent(student1());
		
		return studentInfo;
	}
}

 

ApplicationConfig1.java

package com.day02.Ex01.Java;

import java.util.ArrayList;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ApplicationConfig1 {

	@Bean
	public Student student3()
	{
		ArrayList<String> hobby = new ArrayList<String>();
		hobby.add("수영");
		hobby.add("요리");
		
		Student student = new Student("홍길동", 20, hobby);
		student.setHeight(80);
		student.setWeight(180);
		
		return student;
	}
	
	@Bean
	public Family femily()
	{
		Family family = new Family("홍아빠", "홍엄마");
		family.setBrotherName("홍오빠");
		family.setSisterName("홍언니");
		
		return family;
	}
}

 

MainClass.java

package com.day02.Ex01.Java;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import com.day02.Ex01.*;

public class MainClass {

	public static void main(String[] args) {
		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ApplicationConfig.class);

		Student student1 = ctx.getBean("student1", Student.class);
		System.out.println(student1.getName()); // 홍길동
		System.out.println(student1.getHobbys()); // 수영, 요리

		StudentInfo studentInfo = ctx.getBean("sutudentInfo1", StudentInfo.class);
		Student student2 = studentInfo.getStudent(); // student1 == student2
		System.out.println(student2.getName()); // 홍길동
		System.out.println(student2.getHobbys()); // 수영, 요리

		if (student1.equals(student2)) {
			System.out.println("student1 == student2");
		}
		
		
		//2번째
		Student student3 = ctx.getBean("student3", Student.class);
	      System.out.println(student3.getName());
	      
	      if(student1.equals(student3)) {
	         System.out.println("student1 == student3");
	      } else {
	         System.out.println("student1 != student3");
	      }
	      
	      Family family = ctx.getBean("family", Family.class);
	      System.out.println(family.getPapaName());
	      System.out.println(family.getMamiName());
	      System.out.println(family.getSisterName());
	      System.out.println(family.getBrotherName());
	      
	      ctx.close();
	}
}

 

 

 

XML 방식

XML 방식

 

StudentFamilCTX.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"
	xmlns:c="http://www.springframework.org/schema/c"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

	<bean id="student1" class="com.Ex03.Student" c:name="홍길동" c:age="15" p:height="90" p:weight="180">
		<constructor-arg>
			<list>
				<value>수영</value>
				<value>요리</value>
			</list>
		</constructor-arg>
	</bean>

	<bean id="sutudentInfo1" class="com.Ex03.StudentInfo" p:student-ref="student1">
	</bean>

</beans>

 

StudentFamilCTX1.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"
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:c="http://www.springframework.org/schema/c"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

	<bean id="student3" class="com.Ex03.Student" c:name="홍길동" c:age="15" p:height="90" p:weight="180">
		<constructor-arg>
			<list>
				<value>수영</value>
				<value>요리</value>
			</list>
		</constructor-arg>
	</bean>

	<bean id="family" class="com.Ex03.Family" c:papaName="홍아빠"
		c:mamiName="홍엄마" p:sisterName="홍언니" p:brotherName="홍오빠" />
</beans>

 

 MainClass.java

package com.Ex03;

import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;

public class MainClass {

   public static void main(String[] args) {
      
      String configLocation1 = "classpath:StudentFamilyCTX.xml";
      String configLocation2 = "classpath:StudentFamilyCTX1.xml";
      AbstractApplicationContext ctx 
   = new GenericXmlApplicationContext(configLocation1, configLocation2);
      
      
      Student student1 = ctx.getBean("student1", Student.class);
      System.out.println(student1.getName());   //홍길동
      System.out.println(student1.getHobbys());   // 수영, 요리
      
      
      StudentInfo studentInfo = ctx.getBean("sutudentInfo1", StudentInfo.class);
      Student student2 = studentInfo.getStudent();   //student1  == student2
      System.out.println(student2.getName());   //홍길동
      System.out.println(student2.getHobbys());   // 수영, 요리
      
      if(student1.equals(student2)) {
         System.out.println("student1 == student2");
      }
      
      Student student3 = ctx.getBean("student3", Student.class);
      System.out.println(student3.getName());
      
      if(student1.equals(student3)) {
         System.out.println("student1 == student3");
      } else {
         System.out.println("student1 != student3");
      }
      
      Family family = ctx.getBean("family", Family.class);
      System.out.println(family.getPapaName());
      System.out.println(family.getMamiName());
      System.out.println(family.getSisterName());
      System.out.println(family.getBrotherName());
      
      ctx.close();
      
   }
   
}

 

전 과정하고 다르게 new GenericXmlApplicationContext 사용하였다.

그러나 xml방식과 java방식 모두 2개를 주입해도 사용 되는 것을 확인 할 수 있다. 그러므로 이는 오버로딩을 확인하게 된다.

 

xml 방식은 setter 부분이 xml에다가 넣었다면 java 방식은 java 코드 방식으로 넣었다는 점이다.

그러나 Java 방식에는 @Configuration과 @Beans가 있다는 것을 알 수 있다.

 

이는 어노테이션이라고 부르는 연결방식이다.

 

Java를 안 다면, 누구나 접할 수 있다는 장점이 있다.