No classDefinitionFound error Spring Boot

Question

I'm getting the following error when trying to run my jar file on the command line:

$ java -jar target/Controller-0.0.1-SNAPSHOT.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
    at com.vismark.Controller.App.main(App.java:11)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 1 more

The project runs just fine on eclipse, but this error shows up when running it via commandline.

Below is my pom file:

<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>com.vismark</groupId>
    <artifactId>Controller</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Controller</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.0.4.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>com.vismark.Controller.App</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>

        </plugins>
    </build>
</project>

I'm likely missing something in my pom, I;m just not sure what it is. Where did I go wrong?

https://stackoverflow.com/questions/574594/how-can-i-create-an-executable-jar-with-dependencies-using-maven — guleryuz, Jan 06 '19 at 19:46
Following the instructions resulted in the following error: `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.` ` — Vismark Juarez, Jan 06 '19 at 20:00

score 2 · Answer 1 · answered Jan 06 '19 at 20:11

You most likely want to package an executable JAR. Since you are using Spring Boot you should follow chapter 71. Spring Boot Maven Plugin which explains how to do it using Spring Boot Maven Plugin.

Normally this is done by adding following build configuration to your pom.xml which be trigger during package phase.

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>2.0.4.RELEASE</version>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

As a note you are using ancient JUnit 3.8.1, you really should upgrade.

Tried looking for something and your answered helped repackage — Majid Ali Khan, Oct 25 '19 at 08:46

No classDefinitionFound error Spring Boot

1 Answers1