Spring容器添加组件方式实现

public class TestService {
}

<?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">

  <bean id="testService" class="com.example.springboot.properties.service.TestService"></bean>
</beans>

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;

@SpringBootApplication
@ImportResource(locations = {"classpath:beans.xml"})
public class SpringbootPropertiesConfigApplication {

 public static void main(String[] args) {
 SpringApplication.run(SpringbootPropertiesConfigApplication.class, args);
 }

}

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;

@SpringBootTest
class SpringbootPropertiesConfigApplicationTests {

 //装载ioc容器
 @Autowired
 ApplicationContext ioc;

 @Test
 void contextLoads() {
 //测试这个bean是否已经加载到Spring容器
 boolean flag = ioc.containsBean("testService");
 System.out.println(flag);
 }

}

import com.example.springboot.properties.service.TestService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration //@Configuration注解实践上也是一个Component
public class PerpertiesConfig {
 //通过@Bean注解将组件添加到Spring容器，组件的id就是方法名
  @Bean
  public TestService testService1(){
    return new TestService();
  }
}

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;

@SpringBootTest
class SpringbootPropertiesConfigApplicationTests {

 @Autowired
 ApplicationContext ioc;

 @Test
 void contextLoads() {
 //传方法名testService1
 boolean flag = ioc.containsBean("testService1");
 System.out.println(flag);
 }

}