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Error ClassNotFoundException in jar file Maven Java app

I'm having an error when I try to package my app. It works perfectly if a run the app without packaging. I read lot of posts having the same problem but any solution is working for me. I'm trying to upload my server-side app into the server.

I'm a bit new in java spring boot.

The pom.xml is

<?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>

<groupId>GastosApp</groupId>
<artifactId>GastosApp</artifactId>
<version>1.0-SNAPSHOT</version>


<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
<start-class>Gastos.Application</start-class>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>2.0.4.RELEASE</version>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.6.0</version>
</dependency>
<dependency>
<groupId>org.springframework.mobile</groupId>
<artifactId>spring-mobile-device</artifactId>
<version>1.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0.2</version>
</dependency>

</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
<mainClass>Gastos.Application</mainClass>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>Gastos.Application</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

<repositories>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</repository>
</repositories>

<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>


I read that the problem could be in my main Class, because is an implementation of the CommandLineRunner interface. But I need that.

Any suggestion?

Thanks all.

EDDITED

The Main Class:

@SpringBootApplication
public class Application implements CommandLineRunner
@Autowired
private UserRepository repository;

public static void main(String args)
SpringApplication.run(Application.class, args);


@Override
public void run(String... args) throws Exception
System.out.println("Users found with findAll():");
System.out.println("-------------------------------");
for (User user : repository.findAll())
System.out.println(user);

System.out.println();




2 Answers
2

You should not package Springboot application by yourself. Springboot provided a Maven plugin for package. See here

Create new class which will implement the CommandLineRunner and mark this class as a component.

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