Issue
I use openjdk 14.0.2
, Gradle 7.1.1
and IntelliJ IDEA 2021.1.2
. I have a Spring Boot
project and can run it successfully. Now I want to create an executable jar file. This is build.gradle
:
plugins {
id 'org.springframework.boot' version '2.5.3'
id 'io.spring.dependency-management' version '1.0.11.RELEASE'
id 'java'
}
group = 'com.example.app'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
implementation 'org.springframework.boot:spring-boot-starter-webflux'
compileOnly 'org.projectlombok:lombok'
runtimeOnly 'mysql:mysql-connector-java'
annotationProcessor 'org.projectlombok:lombok'
}
I built main.jar
artifact like it is described here; but executing this command:
$ java -jar main.jar
causes this error:
ERROR org.springframework.boot.SpringApplication - Application run failed
java.lang.IllegalArgumentException: No auto configuration classes found in META-INF/spring.factories. If you are using a custom packaging, make sure that file is correct.
For solving the problem I tried what is described here by adding
bootJar {
mainClassName = 'com.example.ExampleApplication'
}
to the build.gradle
; but the problem is remained.
Note:
- I do not want to use
Maven
instead ofGradle
.
Solution
In stead of trying to combine jar creation with intellij and gradle, just use gradle: First run ./gradlew assemble
or ./gradlew build
(if you want to also run tests and checks) the spring boot gradle plugin will create a fat jar for you which you can run with the java -jar
command. It will be in the ./build/libs
folder.
edit: you can ofcourse also use intellij to run these gradle tasks if you prefer.
Answered By - p.streef