SpringBoot can't find bean to inject

June 6, 2023

I have a simple SpringBoot app which has following classes:

org.domain.abcpoc.controllers.DataController.java

package org.domain.abcpoc.controllers;

import org.domain.abcpoc.entities.UserEntity;
import org.domain.abcpoc.repositories.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/data")
public class DataController {
    @Autowired
    private UserRepository repo;

    @GetMapping()
    public String test() {
        return "test";
    }

    @GetMapping("/user")
    public UserEntity getUser() {
        return repo.findById("E7####J2####1##").orElse(null);
    }
}

org.domain.abcpoc.repositories.UserRepository.java

package org.domain.abcpoc.repositories;

import org.domain.abcpoc.entities.UserEntity;
import org.springframework.data.repository.CrudRepository;

public interface UserRepository extends CrudRepository<UserEntity, String> {
}

My main Spring class is:

package org.domain.abcpoc;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

And the exception I get is:

APPLICATION FAILED TO START

Description:

Field repo in org.domain.abcpoc.controllers.DataController required
a bean of type ‘org.domain.abcpoc.repositories.UserRepository’ that
could not be found.

The injection point has the following annotations:

@org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type
‘org.domain.abcpoc.repositories.UserRepository’ in your
configuration.

Could something else be the issue based on this exception and provided classes?
Database configuration?
pom.xml?

This is part of a Java module, could there be something in the parent pom.xml?

>Solution :

There’s one annotation missing right in the main Spring class. Try adding @EnableJpaRepositories as:

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