配置spring两种方式，XML与注解（通过@Configuration实现bean注入）

ApplicationContext 的实现类，点击左上角小图标可以查看，我们用到的主要是如下红框“注解实现”和“XML实现”两种方式

XML配置需要写xml文件

注解配置把相应配置写java文件里

JAVA配置类

package com.chenxb.config;

import com.chenxb.pojo.ConfigurationAddress;
import com.chenxb.pojo.ConfigurationUser;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AppConfig {
    @Bean
    public ConfigurationUser getConfigurationUser() {
        return new ConfigurationUser();
    }
    @Bean
    public ConfigurationAddress getConfigurationAddress() {
        return new ConfigurationAddress();
    }
//    @Bean
//    public ConfigurationAddress getConfigurationAddress() {
//        return new ConfigurationAddress();
//    }

}

XML配置类

<?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:p="http://www.springframework.org/schema/p" xmlns:c="http://www.springframework.org/schema/c"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">
    <!--    指定要扫描的包-->
    <context:component-scan base-package="com.chenxb.model"></context:component-scan>
<!--    <context:annotation-config/>-->
    <bean id="ComponentAddress" class="com.chenxb.model.ComponentAddress"  scope="singleton" />
<!--    <bean id="Address" class="com.chenxb.pojo.Address"/>-->
</beans>

本文地址：https://blog.csdn.net/weixin_44371237/article/details/112005232