Main Class Not Found Maven Issue in Spring-Boot Eclipse Project

“Unable to find main class” with Maven on spring-boot project in Eclipse

Introduction:

Overview:

Problem:

Solution:

Key points to address:

– Check if the maven build is successful and there are no compilation errors
– Make sure the main class is correctly configured in the project settings
– Check the run configuration in Eclipse and ensure the main class is specified
– Try cleaning and building the project in Eclipse
– Verify if the main class is in the correct package and has the correct annotations for a Spring Boot application

–

Explain the Core Concept:

This error typically occurs when the main class specified in the Maven build configuration is not found.

Maven needs to know which class is the entry point for the application to run.

Check that the main class is correctly configured in the Maven pom.xml file or in the Eclipse run configuration.

Different Solutions with code samples:

1. Make sure your project is correctly configured as a Spring Boot project:

   <packaging>jar</packaging>
   <properties>
       <start-class>com.example.YourApplicationClass</start-class>
   </properties>
   <dependencies>
       <!-- Add Spring Boot dependencies here -->
   </dependencies>
   

2. Update your Maven build settings:
– Right click on your project -> Maven -> Update Project
– Make sure “Resolve dependencies from Workspace projects” is selected

3. Check if your main application class is configured correctly in your Spring Boot Application:

   @SpringBootApplication
   public class YourApplicationClass {
       public static void main(String[] args) {
           SpringApplication.run(YourApplicationClass.class, args);
       }
   }
   

Conclusion:

Ensure that your project is properly configured as a Spring Boot project, update Maven settings, and verify that your main application class is set correctly to resolve the “Unable to find main class” issue in Maven on a Spring Boot project in Eclipse.

Kamal