<?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">
</beans>

ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");

FileSystemXmlApplicationContext context = new FileSystemXmlApplicationContext("絕對路徑/相對路徑");

BeanFactory beanFactory = new XmlBeanFactory(new ClassPathResource("spring-config.xml"));

package com.wangshaoyu.spring.ioc;
public class EmptyClass {
    EmptyClass() {
        System.out.println("EmptyClass 的構造方法被調(diào)用");
    }
}

<!-- 直接注入 -->
<bean id = "user" class="com.wangshaoyu.spring.ioc.User"/>
<bean id = "我的第一個商品" class="com.wangshaoyu.spring.ioc.EmptyClass"/>

<!-- 注冊新的類，并進行構造方法注入 -->
<bean id="我的第二個商品" class="com.wangshaoyu.spring.ioc.SecondClass">
	<!-- 用 "我的第一個商品" 的對象，注入我的構造方法參數(shù)中 -->
	<constructor-arg ref="我的第一個商品" />
</bean>

<!-- setter方法注入 -->
<bean id="我的第三個商品" class="com.wangshaoyu.spring.ioc.ThirdClass">
	<property name="emptyClass" ref="我的第一個商品" />
	<property name="secondClass" ref="我的第二個商品" />
</bean>

User user = (User) context.getBean("user");

User user = context.getBean(User.class);

User user = context.getBean("user", User.class);