冗余声明：@SpringBootApplication 已经适用给定的@ComponentScan

Question

我创建了一个 spring boot 应用程序（3.0.1）。然后我连接了 Postgres 数据库并执行了它。应用在8080服务器上顺利启动。然后我添加了下面提到的注释。

@EnableAutoConfiguration
@ComponentScan

整个文件，

package com.example.SpringRecap;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
@EnableAutoConfiguration
@ComponentScan

public class SpringRecapApplication {

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

    @GetMapping("/")
    public void Employee() {

    }


}

现在，出现下面提到的错误，

Redundant declaration: @SpringBootApplication already applies @EnableAutoConfiguration
Redundant declaration: @SpringBootApplication already applies given @ComponentScan

IntelliJ 的图像：

如果有人知道原因，请帮助我。如果需要更多信息来解决问题，请在此处发表评论。 谢谢你。

Answer 1

出现下面提到的错误：这意味着您可以删除@ComponentScan 和@EnableAutoConfiguration。

As the documentation on spring mentioned，包含在@SpringBootApplication中：

Many Spring Boot developers like their apps to use auto-configuration, component scan and be able to define extra configuration on their "application class". A single @SpringBootApplication annotation can be used to enable those three features, that is:

    @EnableAutoConfiguration: enable Spring Boot’s auto-configuration mechanism
    @ComponentScan: enable @Component scan on the package where the application is located (see the best practices)
    @Configuration: allow to register extra beans in the context or import additional configuration classes 

这是Intellij插件中的检查。另见https://youtrack.jetbrains.com/issue/IDEA-177632