spring 引用其他bean

applicationContext.xml配置文件为:

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:p="http://www.springframework.org/schema/p"

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">
<!-- 配置bean -->

<bean id="car" class="com.spring.Car">

<constructor-arg value="green"></constructor-arg>

<constructor-arg value="22"></constructor-arg>

</bean>

<bean id="person" class="com.spring.Person">

<property name="name" value="xiao"></property>

<property name="age" value="22"></property>

<property name="car" ref="car"></property>

</bean>

</beans>

package com.spring;

public class Car {

private String name;

private String color;

private int num;

public Car(String color, int num) {

super();

this.color = color;

this.num = num;

}

@Override

public String toString() {

return "Car [name=" + name + ", color=" + color + ", num=" + num + "]";

}

}

package com.spring;

public class Person {

private String name;

private int age;

private Car car;

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 Car getCar() {

return car;

}

public void setCar(Car car) {

this.car = car;

}

@Override

public String toString() {

return "Person [name=" + name + ", age=" + age + ", car=" + car + "]";

}

}

测试类：

package com.spring;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

public static void main(String[] args) {

//1.创建spring IOC容器

ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

Car car = (Car) ctx.getBean("car");

//System.out.println(car.toString());

Person person = (Person) ctx.getBean("person");

System.out.println(person);

}

}

运行结果为:

Person [name=xiao, age=22, car=Car [name=null, color=green, num=22]]