Maven configuration with Spring Boot & multi modules - run application in Intellij

Question

I\'m currently working on a REST API with Spring Boot.

I\'m new to Maven and have just started coding with IDEA (don\'t know well this IDE yet), and I have a problem

Answer 1

You need to tell SpringBoot where to look for your controllers. Per default that only happens in sub-packages of your @SpringBootApplication class (which will probably not include your sub module).

In order to change that you can use @ComponentScan("path.to.package") to change the default package.

Additionally, you can use @EntityScan to do the same for @Entity classes that might be in your sub-module.

Answer 2

also note that in case of JPA Entities and repositories are not in sub packages of Application.java's package then @Entityscan and @EnableJpaRepositories MUST be declared in the Application class, e.g:

@Configuration
@ComponentScan(basePackages="com.my.pack")
@EnableAutoConfiguration
@EnableJpaRepositories(basePackages="com.my.pack")
@EntityScan(basePackages="com.my.pack")
public class Application{

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

Answer 3

Your project structured as:

• parent
  • pom.xml
  • main module
    • controller
    • domain
    • App.java (Spring Boot main class)
    • pom.xml (add sub moudle to main module as dependency)
  • sub module
    • controllers
    • domain
    • pom.xm

if your App.java in a package: com.xxxx.pro,then set the sub module's package is com.xxx.pro,such as your sub module's controller is TestController.java, and the code is:

package com.xx.pro.web;
@RestController
public class TestController{

}

so, this sub moudle's TestController will be sanned by App.java.Try it on, good luck.