IOC注入多种复杂类型

简单类型注入

Person.java

public class Person {
	private Integer id;
	private String name;
	private String gender;
	...
}

ioc.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
        http://www.springframework.org/schema/beans/spring-beans.xsd">
        
	<bean id = "Person01" class="entity.Person">
		<property name="id" value="1151301118"></property>
		<property name="name" value="linjinbao"></property>
		<property name="gender" value="男"></property>
	</bean>
</beans>

注入另一个bean

Person.java

public class Person {
	private Integer id;
	private String name;
	private String gender;
	private Car car;	//另外一个bean
	...
}

Car.java

public class Car {
	private String name;
	private double price;
	...
}

ioc.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
        http://www.springframework.org/schema/beans/spring-beans.xsd">
        
	<bean id = "Person01" class="entity.Person">
		<property name="id" value="1151301118"></property>
		<property name="name" value="linjinbao"></property>
		<property name="gender" value="男"></property>
		<property name="car">
			<bean class="entity.Car">
				<property name="name" value="宝马"></property>
				<property name="price" value="100000.00"></property>
			</bean>
		</property>
	</bean>
</beans>

注入另一个bean（方式二，引用ref）

...
<bean id = "Person02" class="entity.Person">
	<property name="id" value="1151301119"></property>
	<property name="name" value="linjinbao66"></property>
	<property name="gender" value="女"></property>
	<property name="car" ref="Car01"></property>
</bean>

注入复杂类型 包括List 和 Map


<?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
        http://www.springframework.org/schema/beans/spring-beans.xsd">
   
	<bean id = "Person03" class="entity.Person">
		<property name="id" value="1151301120"></property>
		<property name="name" value="linjinbao666"></property>
		<property name="gender" value="男"></property>
		<property name="car" ref="Car01"></property>
		<property name="books">
			<list>
				<bean class="entity.Book">
					<property name="name" value="西游记"></property>
					<property name="price" value="100"></property>
					<property name="author" value="吴承恩"></property>
				</bean>
				<bean class="entity.Book">
					<property name="name" value="西游记"></property>
					<property name="price" value="100"></property>
					<property name="author" value="吴承恩"></property>
				</bean>
			</list>
		</property>
		<property name="maps">
			<map>
				<entry key="msg" value="hello"></entry>
				<entry key="car">
					<bean class="entity.Car">
						<property name="name" value="桑塔纳"></property>
						<property name="price" value="100000.00"></property>
					</bean>
				</entry>
			</map>
		</property>
	</bean>
	

</beans>

总结

SpringIOC反向代理， 通过解析xml配置文件，来加载bean，实体类中的属性体现在bean中就是

重点： 复杂类型不能直接在value中体现

  1. 简单类型直接：<property name="name" value="西游记"></property>
  2. 自己定义的bean类型：
<bean class="entity.Book">
	<property name="name" value="西游记"></property>
	<property name="price" value="100"></property>
	<property name="author" value="吴承恩"></property>
</bean>
  1. map， list， set等复杂类型：
<property name="maps">
	<map>
		<entry key="msg" value="hello"></entry>
		<entry key="car">
			<bean class="entity.Car">
				<property name="name" value="桑塔纳"></property>
				<property name="price" value="100000.00"></property>
			</bean>
		</entry>
	</map>
</property>