SpringBoot: can't create war with maven: Unable to find main class - spring

Question

I have a SpringBoot project with the war and ear module, that I build using maven ( a build automation tool used primarily for Java projects.) and IntelliJ IDEA
This is my pom.xml of the war project
<?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>
<parent>
<groupId>com.bendiciones</groupId>
<artifactId>bendiciones-parent</artifactId>
<version>4.0.0-SNAPSHOT</version>
</parent>
<artifactId>bendiciones-war</artifactId>
<name>bendiciones war</name>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.bendicionesbendiciones</groupId>
<artifactId>bendiciones</artifactId>
<version>${project.version}</version>
<exclusions>
<exclusion>
<artifactId>spring-boot-starter-tomcat</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<finalName>bendiciones</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.bendiciones.Application</mainClass>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<scm>
<tag>bendiciones-parent-4.0.0-SNAPSHOT</tag>
</scm>
</project>
But when I build the class I have this error:
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.1.5.RELEASE:repackage (repackage) on project bendiciones-war: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.1.5.RELEASE:repackage failed: Unable to find main class -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.1.5.RELEASE:repackage (repackage) on project bendiciones-war: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.1.5.RELEASE:repackage failed: Unable to find main class
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
Even the class exist in the project

Answer 1

Add your main(starterApplication) class. The "Main-Class" in the manifest is actually controlled by the "layout" property of the Spring Boot plugin.
<build>
<plugins>
...
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.your.starter.Application</mainClass>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
And you need to check META-INF/MANIFEST.MF.
Main-Class: org.springframework.boot.loader.WarLauncher
Start-Class: com.your.starter.Application
The Executable War File Structure
example.war
|
+-META-INF
| +-MANIFEST.MF
+-org
| +-springframework
| +-boot
| +-loader
| +-<spring boot loader classes>
+-WEB-INF
+-classes
| +-com
| +-mycompany
| +-project
| +-YourClasses.class
+-lib
| +-dependency1.jar
| +-dependency2.jar
+-lib-provided
+-servlet-api.jar
+-dependency3.jar
Or Build using parent and child relationships.
<build>
<pluginManagement>
<plugins>
...
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</pluginManagement>
</build>

Answer 2

You are packaging your application in WAR, that indicates your application is Web Application. Thus, please check or add below important Spring Boot dependency in pom.xml for same:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>