Spring Bean管理(注解的方式)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    <context:component-scan base-package="org.yzytest1"></context:component-scan>   <!--开启包扫描-->
</beans>

@Component("Demo1")     //使用注解Component
public class Demo1 {
    @Value("yzy")
    private String name;
    public void say(){
        System.out.println("你好呀！"+name);
    }
}

@Component("Demo1")     
public class Demo1 {
    @Value("yzy")            //使用注解Value，属性注入
    private String name;
    public void say(){
        System.out.println("你好呀！"+name);
    }
}    

import org.springframework.stereotype.Component;

import javax.annotation.Resource;

@Component("Demo1")
public class Demo1 {
    @Resource(name="User")       //使用@Resource，属性注入对象
    private User user;
    public void say(){
        System.out.println("你好呀！"+user.getUsername());
    }
}