spring-boot-vuejs | Example project showing how to build a Spring Boot App | Command Line Interface library

It should work if you apply to the plugin as described in

https://www.eclipse.org/m2e/documentation/release-notes-17.html

Here are some things to consider, I don't know if any of them will help, but we never know:

On the backend:

• Check again your backend pom.xml and see if the required dependencies are properly in it
• Make sure you don't have a server.servlet.contextPath=/api in your application.properties
• Make sure the application.properties contains server.port=8080 (or just don't this property, the default port is 8080).
• I don't think the GreetingController is useful... The purpose of the @RequestMapping you specified on the method is to avoid your controller to take over when the client refreshes his page and the browser sends a /toto"... If you don't have this rule, your server will try to execute the /toto route, which it doesn't know of... Try either removing the @RequestMapping on your controller class, or delete the class for now...

On the frontend:

• You said your application were working when you were doing the npm run serve command and trying to access http://localhost:8080/... which is okay and weird. Using this command is to allow you to have a frontend server, faster to develop your frontend and your components. Here is my vue.config.js, see if you get the same, or something close:

Let's break it down into two steps,

1. Backend - Here you want to have an endpoint which receives data as either GET Params or POST body, process it and return a easily parse-able format (like json)

2. Frontend - Use an xhr library (like axios) to send a request to that specific endpoint with the data it needs to process, wait for the request to complete, you'll receive the response as a string, parse that json string into a js object and you can then process it.

Resources which will help you get started:

Axios Example: https://github.com/axios/axios#example

Restful Service with spring: https://spring.io/guides/gs/rest-service/

Okay, as I am having two modules IntelliJ used the classpath of the whole project instead of the backend module.

After changing the path in the configuration to: Use classpath of module: backend everything works fine.