1下载spring入门jar包（初学者够用）并导入对应项目WEB-INF/lib中
自制了百度云链接:https://pan.baidu.com/s/11XqWsZlhhXAVbXsbuR11jQ 密码:gpb4

2创建以下文件用于测试项目

文件结构

代码：

//Test.java
package dao;
public interface TestDao {
    public void sayHello();
}

//TsetDaoImpl.java
package dao;
public class TestDaoImpl implements TestDao{
    
    public void sayHello() {
        System.out.println("hello,topus");
        
    }
}

<!-- applicationContext.xml -->
<?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">

    <!-- 将指定的TestDaoImpl配置给Spring，让Spring创建其实例 -->
    <bean id="test" class="dao.TestDaoImpl">
        <!-- collaborators and configuration for this bean go here -->
    </bean>
</beans>

这一段来自官方参考文档：
https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-factory-metadata

//Test.java
package test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import dao.TestDao;
public class Test {
    public static void main(String[] args){
        //初始化Spring容器ApplicationContext,加载配置文件
        ApplicationContext appCon = new ClassPathXmlApplicationContext("applicationContext.xml");
        TestDao tt=(TestDao)appCon.getBean("test");//Test 为配置文件中的id
        tt.sayHello();
    }
}

3运行

结果