Spring5.X的注解配置项目

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>net.cybcclass</groupId>
    <artifactId>cyb_spring</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
    </dependencies>
</project>

VideoService.java

package net.cybclass.sp.servicce;

import net.cybclass.sp.domain.Video;

public interface VideoService {
    int save(Video video);
    Video findById(int id);
}

VideoServiceImpl.java

package net.cybclass.sp.servicce;

import net.cybclass.sp.domain.Video;
import org.springframework.stereotype.Component;

//@Component("videoService") //相当于配置bean的id
@Component() //相当于配置bean的id
public class VideoServiceImpl implements VideoService{
    public int save(Video video) {
        System.out.println("保存Video");
        return 0;
    }

    public Video findById(int id) {
        System.out.println("根据id找视频");
        return new Video();
    }
}

在实现类上加@Component，若没有取名字的话，默认是，类名首字母小写

演示