props, autowired

props, autowired

2024. 2. 7. 18:03ㆍDaily Codig Reminder

map props

bean

<bean id="pet01" class="com.spring.Cat">
        <property name="catName" value="나비"></property>
        <property name="catAge" value="3"></property>
    </bean>
    <bean id="pet02" class="com.spring.Cat">
        <property name="catName" value="하늘"></property>
		<property name="catAge" value="2"></property>
    </bean>
    <bean class="com.spring.Student" id="student">
    <property name="name" value="홍길동"></property>
    <property name="age" value="10">
    </property>
    <property name="mapCat">
    <map>
    <entry key="one" value-ref="pet01"></entry>
    <entry key="two" >
    <ref bean="pet02"/>
    </entry>
    </map>
    </property>
    <property name="phones">
    <props>
    <prop key="one">010</prop>
    <prop key="two">011</prop>
    <prop key="three">018</prop>
    </props>
    </property>
    </bean>

main

GenericXmlApplicationContext ctx= 
				new GenericXmlApplicationContext("classpath:com/spring/stu.xml");
		Student stu= ctx.getBean("student", Student.class);
		Map<String, Cat> map= stu.getMapCat();
		Set<String> keys= map.keySet();
		for (String key : keys) {
			System.out.println(map.get(key));
		}
		System.out.println("=============");	
		
		
		Properties props= stu.getPhones();
		
		Set<String> xxx= props.stringPropertyNames();//전체 key값을 set형태로 리턴
		for (String key : xxx) {
			System.out.println(props.getProperty(key));
		}

bean

<bean id="another1" class="com.spring.AnotherBean">
        <property name="name" value="홍길동"></property>
        <property name="age" value="10"></property>
    </bean>
<bean id="another2" class="com.spring.AnotherBean">
        <property name="name" value="이순신"></property>
        <property name="age" value="20"></property>
    </bean>
    <bean class="com.spring.EchoBean" id="echoBean">
   
    <property name="map">
    <map>
    <entry key="one" value-ref="another1"></entry>
    <entry key="two" >
    <ref bean="another2"/>
    </entry>
    </map>
    </property>
    </bean>

main

ApplicationContext ctx =
//				new GenericXmlApplicationContext("echo.xml");
		new GenericXmlApplicationContext("classpath:com/spring/echo.xml");
		
		EchoBean echoRef = ctx.getBean("echoBean", EchoBean.class);
		Map<String,AnotherBean> map = echoRef.getMap();
		Set<String> keys = map.keySet();
		for (String k : keys) {
			System.out.println("key : "+ k+ "   "+map.get(k).getName()+"\t"+map.get(k).getAge());
		}
}

scope

<bean id="stu1" class="com.spring.Student" ></bean>
<bean id="stu2" class="com.spring.Student" > </bean>

main

GenericXmlApplicationContext ctx= 
		new GenericXmlApplicationContext("classpath:com/spring/studentBean.xml");
	
		Student  stu1= (Student)ctx.getBean("stu1");
		Student  stu2= (Student)ctx.getBean("stu2");
		System.out.println(stu1+"\t"+stu2);
		System.out.println("stu1==stu2");
		System.out.println(stu1==stu2);//prototype
		Student stu3= ctx.getBean("stu2", Student.class);
		System.out.println(stu1==stu3);

studnet기본생성자 =====

com.spring.Student@6f43c82

com.spring.Student@5db6b9cd

stu1==stu2

false

prop 자동주입 byType, byName

타입

default-autowire="byType"

bean

<?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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"
	default-autowire="byType"
	
	>
<!--  기본생성자 사용 필수  -->
<!-- 생성된 빈 (객체 ) 이용타입에 맞는 set 함수에 자동 주입, person에 빈 주입 property 태그 필요없음-->

<bean id="xx" class="com.spring.Cat">
<property name="catName" value="야옹이"></property>
<property name="catAge" value="10"></property>
</bean>
<bean id="yy" class="com.spring.Dog">
<property name="dogName" value="멍멍이"></property>
</bean>
<!-- default - autowire ="byType" 선언으로 자동 주입됨 -->
<bean id="onePerson" class="com.spring.Person">
<property name="username" value="홍길동"></property>
<!-- cat, dog 자동 주입됨 byType -->
<!-- <property name="cat" value="xx"></property>
<property name="dog" value="yy"></property> -->
</bean>
</beans>

console

2.xml에서 빈 생성 , 생성 빈 사용 방법=========

Person [username=홍길동, cat=Cat [catName=야옹이, catAge=10], dog=Dog [DogName=멍멍이]]

Cat [catName=야옹이, catAge=10]

Dog [DogName=멍멍이]

2. 이름

주입시켜줄 bean 이 한개만 있어야 함

<bean id="cat02" class="com.spring.Cat">
<property name="catName" value="야옹이"></property>
<property name="catAge" value="10"></property>
</bean>
<bean id="xx" class="com.spring.Cat">
<property name="catName" value="야옹이"></property>
<property name="catAge" value="10"></property>
</bean>

이렇게 두개 있으면 안생김

byName

을 쓰면 cat 과 똑같은 cat 만 주입이 됨

muti_config

<bean id="cat" class="com.spring.Cat">
<property name="catName" value="야옹이"></property>
<property name="catAge" value="10"></property>
</bean>

<bean id="onePerson" class="com.spring.Person" autowire="byType">
<property name="username" value="홍길동"></property>
</bean>

list_autowired

bean

<bean id="another" class="com.spring.AnotherBean"></bean>

<bean id="echoBean" class="com.spring.EchoBean" autowire="byType"><!-- 멤버변수이름과 같은 id주입 -->
	<!-- anotherBean으로 자동 주입 -->
	<property name="valueList">
		<list>
			<value>10</value>
			<value>20</value>
			<value>30</value>
		</list>
	</property>
</bean>

echo bean↓

private List valueList;
	private AnotherBean anotherBean;
	
	public String sayEcho() {
		return "hello";
	}
	public EchoBean(AnotherBean anotherBean) {
		System.out.println("EchoBean(AnotherBean anotherBean) 생성자 호출됨");
		this.anotherBean= anotherBean;
	}
	public void setAnotherBean(AnotherBean anotherBean) {
		System.out.println("EchoBean.setAnotherBean(AnotherBean anotherBea)호출됨=="+
	anotherBean);
		this.anotherBean = anotherBean;
	}
	public EchoBean() {}
	public void setValueList(List valueList) {
		this.valueList= valueList;
	}
	public List getValueList() {
		return valueList;
	}
	public void getInfo() {
		System.out.println(valueList);
	}

	public AnotherBean getAnotherBean() {
		return anotherBean;
	}

[10, 20, 30]

AnotherBean getInfo()=======================

getInfo 로 찍음

autowired_constructor

<bean id="another" class="com.spring.AnotherBean"></bean>
<!-- autowire constructor -->
<bean id="echoBean" class="com.spring.EchoBean" autowire="constructor"><!-- byType으로 생성자 호출-->
	<!-- public EchoBean(AnotherBean anotherBean) {
		System.out.println("EchoBean(AnotherBean anotherBean) 생성자 호출됨");
		this.anotherBean= anotherBean;  
	} -->
	<!-- anotherBean으로 자동 주입 -->
	<property name="valueList">
		<list>
			<value>10</value>
			<value>20</value>
			<value>30</value>
		</list>
	</property>
</bean>

package com.spring;

import java.util.List;

public class EchoBean {
	private List valueList;
	private AnotherBean anotherBean;
	
	public String sayEcho() {
		return "hello";
	}
	public EchoBean() {
	}
	public EchoBean(AnotherBean anotherBean) {
		System.out.println("EchoBean(AnotherBean anotherBean) 생성자 호출됨");
		this.anotherBean= anotherBean;
	}
	public void setAnotherBean(AnotherBean anotherBean) {
		System.out.println("EchoBean.setAnotherBean(AnotherBean anotherBea)호출됨=="+
	anotherBean);
		this.anotherBean = anotherBean;
	}

	public void setValueList(List valueList) {
		this.valueList= valueList;
	}
	public List getValueList() {
		return valueList;
	}
	public void getInfo() {
		System.out.println(valueList);
	}

	public AnotherBean getAnotherBean() {
		return anotherBean;
	}



}

[10, 20, 30]

AnotherBean getInfo()=======================

(autowired_constructor)2

<bean id="another" class="com.spring.AnotherBean"></bean>
	<!-- autowire constructor -->
	<util:list id="aaaaaa">
		<value>10</value>
		<value>20</value>
		<value>30</value>
	</util:list>
	<bean id="echoBean" class="com.spring.EchoBean"
		autowire="constructor"><!-- byType으로 생성자 호출 -->
		<!-- public EchoBean(AnotherBean anotherBean) { System.out.println("EchoBean(AnotherBean 
			anotherBean) 생성자 호출됨"); this.anotherBean= anotherBean; } -->
		<!-- anotherBean으로 자동 주입 -->
		<!-- <property name="valueList"> <list> <value>10</value> <value>20</value> 
			<value>30</value> </list> </property> -->

package com.spring;

import java.util.List;

public class EchoBean {
	private List valueList;
	private AnotherBean anotherBean;
	
	public EchoBean(List valueList, AnotherBean anotherBean) {
		super();
		this.valueList = valueList;
		this.anotherBean = anotherBean;
		System.out.println("생성자 호출 ");
	}
	public String sayEcho() {
		return "hello";
	}
	public EchoBean(AnotherBean anotherBean) {
		System.out.println("EchoBean(AnotherBean anotherBean) 생성자 호출됨");
		this.anotherBean= anotherBean;
	}
	public void setAnotherBean(AnotherBean anotherBean) {
		System.out.println("EchoBean.setAnotherBean(AnotherBean anotherBea)호출됨=="+
	anotherBean);
		this.anotherBean = anotherBean;
	}
	public EchoBean() {
			}
	public void setValueList(List valueList) {
		this.valueList= valueList;
	}
	public List getValueList() {
		return valueList;
	}
	public void getInfo() {
		System.out.println(valueList);
	}

	public AnotherBean getAnotherBean() {
		return anotherBean;
	}



}

AnotherBean getInfo()=======================

[10, 20, 30]

Service_DAO

Dao

public List<String>getList(){

return Arrays.asList(”A”,”B”,”C”); }

Main ⇒ service.getList()⇒ dao.getList() 순회하여 출력 config.xml dao, service

dao 명시적 주입 (Property 이용) test
byType 이용 자동 주입 Test
byName 이용 자동주입 Test

<bean id="dao" class="com.dao.DeptDAO"></bean>
<bean class="com.service.DeptService" id="deptService"  autowire="byType">
</bean>

prototype/singletone

System.out.println("2.xml에서 빈 생성 , 생성 빈 사용 방법=========");
		ApplicationContext ctx = new
				GenericXmlApplicationContext("classpath:com/spring/echo.xml");
		EchoBean echo1 = ctx.getBean("echoBean", EchoBean.class);
		EchoBean echo2 = ctx.getBean("echoBean", EchoBean.class);

		System.out.println(echo1==echo2);
		System.out.println(echo1+"\t"+echo2);
		System.out.println(echo1.getAnotherBean()==echo2.getAnotherBean());

<bean class="com.spring.AnotherBean" id ="anotherBean1" scope="prototype"></bean>
 
<bean class="com.spring.EchoBean" id="echoBean" scope="prototype" autowire="byType">
<property name="valueList">
<list>
<value>10</value>
<value>20</value>
<value>30</value>
</list>
</property>
</bean>

false

EchoBean [valueList=[10, 20, 30], anotherBean=com.spring.AnotherBean@72ef8d15]

EchoBean [valueList=[10, 20, 30], anotherBean=com.spring.AnotherBean@6aa8e115]

false

<bean class="com.spring.AnotherBean" id ="anotherBean1" ></bean>
 
<bean class="com.spring.EchoBean" id="echoBean" scope="singleton" autowire="byType">
<property name="valueList">
<list>
<value>10</value>
<value>20</value>
<value>30</value>
</list>
</property>
</bean>


</beans>

2.xml에서 빈 생성 , 생성 빈 사용 방법=========

true

EchoBean [valueList=[10, 20, 30], anotherBean=com.spring.AnotherBean@23202fce]

true

@Autowired ❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗

속성 또는 생성자, setter 메소드에 설정, 필수 속성이다

(requires=false 로 필수 속성 해제 가능)

-autowire=”byType”과 동일한 기능 -ㅂ열 , 컬렉션 모두 설정가능

package com.spring;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Required;

public class Person {
	String username;
    int age;
    //***//
@Autowired
    Cat cat;
//injection 함수
@Autowired
    Dog dog;
	public void setCat(Cat cat) {
		this.cat = cat;
	}
	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public Cat getCat() {
		return cat;
	}




	@Override
	public String toString() {
		return "Person [username=" + username + ", age=" + age + ", cat=" + cat + ", dog=" + dog + "]";
	}
	public Person(String username, int age, Cat cat, Dog dog) {
		super();
		this.username = username;
		this.age = age;
		this.cat = cat;
		this.dog = dog;
	}
	public Dog getDog() {
		return dog;
	}
	public void setDog(Dog dog) {
		this.dog = dog;
	}
	public Person(String username, int age, Cat cat) {
		super();
		this.username = username;
		this.age = age;
		this.cat = cat;
	}

	public Person() {
		super();
		// TODO Auto-generated constructor stub
	}
    
    
}

bean

<context:annotation-config></context:annotation-config>
<bean class="com.spring.Cat" id ="pet01" >
<constructor-arg name="catName" value="야옹이"></constructor-arg>
<constructor-arg name="catAge" value="20"></constructor-arg>
</bean>

 <bean class="com.spring.Dog" id ="pet02" ></bean>

<bean class="com.spring.Person" id="person">
<property name="username" value="홍길동"></property>
<property name="age" value="10"></property>
</bean>

Person [username=홍길동, age=10, cat=Cat

[catName=야옹이, catAge=20], dog=com.spring.Dog@32c4e8b2]

//@Autowired(required = false)//기본주입의무사항이 아님
  @Autowired
    Cat cat;

xml에서 쓸 때

false 쓰면 null 로 찍히는데 false 안쓰면 작동이 안됨

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공지사항

아카이브

map props

prop 자동주입 byType, byName

@Autowired ❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗❗

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