[Spring5]IOC容器_Bean管理注解方式_完全注解开发

Posted 2022-03-04 唐火

完全注解开发

（1）创建配置类，替代xml配置文件

package com.atguigu.spring.config;

        import org.springframework.context.annotation.ComponentScan;
        import org.springframework.context.annotation.Configuration;

@Configuration //作为配置类，替代xml配置文件
@ComponentScan(basePackages = "com.atguigu.spring")
public class SpringConfig 

（2）编写测试类

package com.atguigu.spring.testdemo;

import com.atguigu.spring.config.SpringConfig;
import com.atguigu.spring.service.UserService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpring5Demo1 
    @Test
    public void testService2()
    
        //加载配置类
        ApplicationContext context = new AnnotationConfigApplicationContext(SpringConfig.class);
        UserService userService = context.getBean("userService", UserService.class);
        System.out.println(userService);
        userService.add();