package com.atguigu.spring.beans;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author 国真
 *
 */
public class Main {
    public static void main(String[] args) {
        /*
        //创建一个helloWorld 对象
        HelloWorld helloWorld = new HelloWorld();
        //设置名字
        helloWorld.setUserName("spring");
        */

        //1. 创建 Spring的IOC容器对象
        //ApplicationContext 代表 IOC 容器
        //ClassPathXmlApplicationContext：是ApplicationContext接口的实现类，该实现类从类路径下来加载xml配置文件
        ApplicationContext ctx = new ClassPathXmlApplicationContext("one.xml");

        //2. 从IOC容器中获取Bean实例
        //利用 id 定位到 IOC 容器中的 Bean
        HelloWorld helloWorld = (HelloWorld)ctx.getBean("helloWorld");
        Car car = (Car)ctx.getBean("car");
        Car car1 = (Car) ctx.getBean("car1");
        Person person = (Person) ctx.getBean("person");
        Person person2 = (Person) ctx.getBean("person2");
        //利用类型返回 IOC 容器中的 Bean, 但要求 IOC 容器中必须只能有一个该类型的 Bean
//      HelloWorld helloWorld = ctx.getBean(HelloWorld.class);

        //3. 打印名字
        helloWorld.hello();
        System.out.println(car);
        System.out.println(car1);
        System.out.println(person);
        System.out.println(person2);
    }
}

package com.atguigu.spring.beans;

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 + "]";
    }

    public Person(String name, int age, Car car) {
        super();
        this.name = name;
        this.age = age;
        this.car = car;
    }
    public Person() {
        super();
    }

}