无法解析符号@SpringBootApplication - IntelliJ DEA

Question

I imported a Spring Initializr build to IntelliJ and then run it as a Spring Boot build. The build works fine and displays in the browser but I continue to receive an error about unused imports and that @SpringBootApplication cannot be resolved. I also followed these steps as well: Cannot resolve symbol SpringApplication

Anyone else has this issue.

package com.sts.kevthedev;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class KevthedevApplication {

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

Answer 1

Try it:
File -> Invalidate Caches/Restart -> Invalidate And Restart

Answer 2

Put your mouse over and press ⌥ Option + Enter , then click on Add library... (most of the cases the first option);

Otherwise:

File ▸ Invalidate Caches/Restart ▸ Invalidate And Restart

then:

Answer 3

First of all resolve all the dependency using

mvn dependency:resolve

and if still you see the error, cannot resolve @SpringBootApplication

then in pom.xml, add the version this version you can also get from https://start.spring.io/ which you would have selected while creating zip file for spring-boot project

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <version>2.5.3</version>
</plugin>

after this let the dependency to resolve by saving pom.xml and once it's resolved error will be gone

Answer 4

Error sometimes happens when wrong class mentioned as per below

Spring**Boot**Application.run(OrderServiceApplication.class);

It should be like below and as per other useful tips by others to clear the cache will also help to resolve your problem.

SpringApplication.run(OrderServiceApplication.class);

Answer 5

May be you need to change the maven path from you IDE. In you intellij IDE, go to

settings -> Build, Execution, Deployment -> Build tools -> Maven

and from there click on the Maven home path dropdown and select the Bundled (Maven 3)

Answer 6

i had the same problem , a simple :

File -> Invalidate Caches/Restart -> Invalidate And Restart

then maven -> Reload Project

solve it

Answer 7

follow below steps. for me, It worked.

1. invalidate cache and restart.

2. when intellij reopend, you can see gradle build script is detected( or maven)

   just click 'build gradle' like message.

   then intellij will run build script, and dependencies also gonna be resolved.

Answer 8

Go inside the settings -> Build, Execution, Deployment -> Build tools -> Maven

and choose the maven home path as "Bundled (Maven 3)"