Spring更简单的存储方式与获取方式详解

<?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:content="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">
    <!-- 配置一下：bean注解扫描的根路径（方面后面更简单存储对象到spring容器）-->
    <content:component-scan base-package="com.bit"></content:component-scan>
</beans>

package com.bit;

import org.springframework.stereotype.Controller;

/**
 * Description：
 * User: lmp
 * Date: 2022-05-24
 * Time: 19:23
 */
@Controller
public class UserController {
    public void sayHi(String name){
        System.out.println("Hi controller"+name);
    }
}

package com.bit;

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

/**
 * Description：
 * User: lmp
 * Date: 2022-05-24
 * Time: 15:25
 */
public class App {
    public static void main(String[] args) {
        //先获取对象的Spring
        ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
        //从 Spring 中获得存入的对象(将存入的类首字母小写，若类名字符大于2个，并且前两个字符都是大写，那么使用原类名作为bean的名字)
        UserController userController = context.getBean("userController",UserController.class);
        userController.sayHi("Bit");
    }
}

package com.bit.util;

import com.bit.Model.User;
import com.sun.org.apache.bcel.internal.generic.RETURN;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

/**
 * Description：
 * User: lmp
 * Date: 2022-05-24
 * Time: 21:14
 */
@Component
public class UserBean {
    @Bean //将当前对象存储在Spring当中
    public User user1(){
        User user = new User();
        user.setId(1);
        user.setName("zhangsan");
        user.setAge(18);
        return user;
    }
}

package com.bit.util;

import com.bit.Model.User;
import com.sun.org.apache.bcel.internal.generic.RETURN;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

/**
 * Description：
 * User: lmp
 * Date: 2022-05-24
 * Time: 21:14
 */
@Component
public class UserBean {
    @Bean(name = {"u1","userInfo1"}) //将当前对象存储在Spring当中
    public User user1(){
        User user = new User();
        user.setId(1);
        user.setName("zhangsan");
        user.setAge(18);
        return user;
    }

    @Bean(name = "u2") //将当前对象存储在Spring当中
    public User user2(){
        User user = new User();
        user.setId(1);
        user.setName("lisi");
        user.setAge(18);
        return user;
    }
}