spring属性注入（复杂类型注入）

╰半夏微凉° 2022-04-23 06:32 253阅读 0赞

> 复杂类型注入

CollectionBean.java

public class CollectionBean {
    	private Object[] arr;//数组类型注入
    	private List list;//list/set 类型注入
    	private Map map;//map类型注入
    	private Properties prop;//properties类型注入
    	public Object[] getArr() {
    		return arr;
    	}
    	public void setArr(Object[] arr) {
    		this.arr = arr;
    	}
    	public List getList() {
    		return list;
    	}
    	public void setList(List list) {
    		this.list = list;
    	}
    	public Map getMap() {
    		return map;
    	}
    	public void setMap(Map map) {
    		this.map = map;
    	}
    	public Properties getProp() {
    		return prop;
    	}
    	public void setProp(Properties prop) {
    		this.prop = prop;
    	}
    	@Override
    	public String toString() {
    		return "CollectionBean [arr=" + Arrays.toString(arr) + ", list=" + list + ", map=" + map + ", prop=" + prop
    				+ "]";
    	}
    	
    }

car.java

public class Car {
    	private String name;
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	@Override
    	public String toString() {
    		return "Car [name=" + name + "]";
    	}
    	
    }

### array:（数组） ###

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd ">
    	
    	<bean name="collectionBean" class="cn.itcast.bean.CollectionBean">
    		<property name="arr">
    			<array>
    				<value>tom1</value>
    				<value>tom2</value>
    				<ref bean="car2"/>
    			</array>
    		</property>
    	</bean>
    	
    	<bean name="car2" class="cn.itcast.bean.Car">
    		<property name="name" value="奔驰"></property>
    	</bean>
    	
    </beans>

Demo:

@Test
    	public void fun2() {
    		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    		CollectionBean collectionBean = (CollectionBean) ac.getBean("collectionBean");
    		
    		System.out.println(collectionBean.toString());
    	}

效果（控制台）：

![20190124164415249.png][]

### list：（集合） ###

改applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd ">
    	
    	
    	<bean name="collectionBean" class="cn.itcast.bean.CollectionBean">
    		<property name="list">
    			<list>
    				<value>jack1</value>
    				<value>jack2</value>
    				<ref bean="car2"/>
    			</list>
    		</property>
    	</bean>
    	
    	<bean name="car2" class="cn.itcast.bean.Car">
    		<property name="name" value="奔驰"></property>
    	</bean>
    	
    </beans>

效果（控制台）：

![20190124164642774.png][]

###  map: ###

改applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd ">
    	
    	
    	<bean name="collectionBean" class="cn.itcast.bean.CollectionBean">
    		<property name="map">
    			<map>
    				<entry key="name" value="tom"></entry>
    				<entry key="addr" value="beijing"></entry>
    				<entry key-ref="car1" value-ref="car2"></entry>
    			</map>
    		</property>
    	</bean>
    	
    	<bean name="car1" class="cn.itcast.bean.Car">
    		<property name="name" value="奔驰1"></property>
    	</bean>
    	<bean name="car2" class="cn.itcast.bean.Car">
    		<property name="name" value="奔驰2"></property>
    	</bean>
    	
    </beans>

效果（控制台）：

![20190124165158492.png][]

Properties

改applicationContext.xml

效果（控制台）：

![20190124165428257.png][]

[20190124164415249.png]: /images/20220323/ef59718c33064752a746ab000a0f77e8.png
[20190124164642774.png]: /images/20220323/25830fda9c5d4ef19d771d611edaebc0.png
[20190124165158492.png]: /images/20220323/20d8452566cc4d71a411ad59233d728a.png
[20190124165428257.png]: /images/20220323/f28b58b5819c46b8960e55b4fb4abcef.png