[Spring boot] No auto configuration classes found in META-INF

문제점

maven build하여 생성한 jar를 java -jar test.jar 하여 실행하는 경우 다음과 같은 오류 발생

 

 

해결

Spring boot에서 메인클래스를 찾지 못하여 발생하는 문제

pom.xml에 다음의 코드를 추가하여 메인클래스를 알려준다.

  <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                    <mainClass>com.example.demo.DemoApplication</mainClass>
                </configuration>
                  <executions>
                    <execution>
                      <goals>
                        <goal>repackage</goal>
                      </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
              <artifactId>maven-assembly-plugin</artifactId>
              <version>2.2-beta-5</version>
              <configuration>
                <archive>
                  <manifest>
                    <addClasspath>true</addClasspath>
                    <mainClass>com.example.demo.DemoApplication</mainClass>
                  </manifest>
                </archive>
                <descriptorRefs>
                  <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
              </configuration>
              <executions>
                <execution>
                  <id>assemble-all</id>
                  <phase>package</phase>
                  <goals>
                    <goal>single</goal>
                  </goals>
                </execution>
              </executions>
            </plugin>
        </plugins>
    </build>

 

 정상적으로 올라가는것을 확인할 수 있다.