spring 获取ioc容器,从容器中获取bean

package com.example.demo;

import com.example.demo.service.MyService;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

@SpringBootTest
class DemoApplicationTests {

   @Test
   void contextLoads() {
             //指定bean 所在的包
      AnnotationConfigApplicationContext context
            = new AnnotationConfigApplicationContext("com.example.demo");
//        context.refresh(); // 初始化 Spring 容器
      // ... 获取和使用 Bean ...
//    context.close();
      MyService bean1 = context.getBean(MyService.class);
      MyService bean2 = context.getBean(MyService.class);

      System.out.println("bean1 hashCode: " + bean1.hashCode());
      System.out.println("bean2 hashCode: " + bean2.hashCode());

      if (bean1 == bean2) {
         System.out.println("bean1 and bean2 are the same instance.");
      } else {
         System.out.println("bean1 and bean2 are not the same instance.");
      }
   }



}