Spring Boot @autowired does not work, classes in different package

Question

I have a Spring boot application.

I get the following error

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'birthdayController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.esri.birthdays.dao.BirthdayRepository com.esri.birthdays.controller.BirthdayController.repository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.esri.birthdays.dao.BirthdayRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE] at or

Following is code of my Repository class

package com.esri.birthdays.dao;
import com.esri.birthdays.model.BirthDay;
public interface BirthdayRepository extends MongoRepository<BirthDay,String> {
    public BirthDay findByFirstName(String firstName);
}

Following is controller.

package com.esri.birthdays.controller;
@RestController
public class BirthdayController {

    @Autowired
    private BirthdayRepository repository;

Works if they are in same package. Not sure why

What package is your main class in? Does its component scanning cover both the repository and controller packages? — Andy Wilkinson, Dec 19 '15 at 07:18

jgr · Answer 1 · 2016-12-07T19:42:56.977

88

When you use @SpringBootApplication annotation in for example package

com.company.config

it will automatically make component scan like this:

@ComponentScan("com.company.config")

So it will NOT scan packages like com.company.controller etc.. Thats why you have to declare your @SpringBootApplication in package one level prior to your normal packages like this: com.company OR use scanBasePackages property, like this:

@SpringBootApplication(scanBasePackages = { "com.company" })

OR componentScan:

@SpringBootApplication
@ComponentScan("com.company")

edited Dec 07 '16 at 19:42

answered Dec 20 '15 at 11:50

jgr

2,831
2
15
28

In my case I needed to change '@EntityScan' to '@ComponentScan', after I added some non-entity classes – ununiform Jul 15 '20 at 20:28

LucaT · Answer 2 · 2016-09-23T06:56:50.097

7

Just put the packages inside the @SpringBootApplication tag.

@SpringBootApplication(scanBasePackages = { "com.pkg1", "com.pkg2", .....})

Let me know.

edited Sep 23 '16 at 06:56

answered Sep 21 '16 at 15:39

LucaT

333
5
13

score 4 · Answer 3 · answered Dec 19 '15 at 07:41

Try annotating your Configuration Class(es) with the @ComponentScan("com.esri.birthdays") annotation. Generally spoken: If you have sub-packages in your project, then you have to scan for your relevant classes on project-root. I guess for your case it'll be "com.esri.birthdays". You won't need the ComponentScan, if you have no sub-packaging in your project.

score 3 · Answer 4 · answered Dec 20 '15 at 10:35

Try this:

    @Repository
    @Qualifier("birthdayRepository")
    public interface BirthdayRepository extends MongoRepository<BirthDay,String> {
        public BirthDay findByFirstName(String firstName);
    }

And when injecting the bean:

    @Autowired
    @Qualifier("birthdayRepository")
    private BirthdayRepository repository;

If not, check your CoponentScan in your config.

sasanka · Answer 5 · 2015-12-21T05:12:11.943

3

Spring Boot will handle those repositories automatically as long as they are included in the same package (or a sub-package) of your @SpringBootApplication class. For more control over the registration process, you can use the @EnableMongoRepositories annotation. spring.io guides

@SpringBootApplication
@EnableMongoRepositories(basePackages = {"RepositoryPackage"})
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

edited Dec 21 '15 at 05:12

answered Dec 21 '15 at 03:18

sasanka

476
5
8

Thanks! I had to use simple @EnableJpaRepositories – user435421 Feb 17 '23 at 03:06

score 3 · Answer 6 · edited Sep 06 '17 at 13:52

3

In my case @component was not working because I initialized that class instance by using new <classname>().

If we initialize instance by conventional Java way anywhere in code, then spring won't add that component in IOC container.

edited Sep 06 '17 at 13:52

ᗩИᎠЯƎᗩ

2,122
5
29
41

answered Sep 06 '17 at 12:36

Nikhil Kakade

111
7

score 2 · Answer 7 · edited Mar 25 '17 at 00:39

2

For this kind of issue, I ended up in putting @Service annotation on the newly created service class then the autowire was picked up. So, try to check those classes which are not getting autowired, if they need the corresponding required annotations(like @Controller, @Service, etc.) applied to them and then try to build the project again.

edited Mar 25 '17 at 00:39

Rumid

1,627
2
21
39

answered Mar 24 '17 at 16:13

Sreeni

21
3

score 2 · Answer 8 · answered Sep 28 '19 at 14:14

By default, in Spring boot applications, component scan is done inside the package where your main class resides. any bean which is outside the package will not the created and thus gives the above mentioned exception.

Solution: you could either move the beans to the main spring boot class(which is not a good approach) or create a seperate configutation file and import it:

@Import({CustomConfigutation1.class, CustomConfiguration2.class})
@SpringBootpplication
public class BirthdayApplication {

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

}

Add beans to these CustomConfiguration files.

score 1 · Answer 9 · answered Sep 11 '19 at 13:31

1

I had the same problem. It worked for me when i removed the private modifier from the Autowired objects.

answered Sep 11 '19 at 13:31

Prerit Jain

200
1
5

score 1 · Answer 10 · answered Sep 24 '20 at 20:19

Another fun way you can screw this up is annotating a setter method's parameter. It appears that for setter methods (unlike constructors), you have to annotate the method as a whole.

This does not work for me: public void setRepository(@Autowired WidgetRepository repo)

but this does: @Autowired public void setRepository(WidgetRepository repo)

(Spring Boot 2.3.2)

score 0 · Answer 11 · answered Oct 23 '18 at 06:58

There will definitely be a bean also containing fields related to Birthday So use this and your issue will be resolved

@SpringBootApplication
@EntityScan("com.java.model*")  // base package where bean is present
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Suresh yadav · Answer 12 · 2020-02-25T13:44:09.683

0

package com.test.springboot;
        @SpringBootApplication
    @ComponentScan(basePackages = "com.test.springboot")
    public class SpringBoot1Application {

        public static void main(String[] args) {
            ApplicationContext context=  SpringApplication.run(SpringBoot1Application.class, args);

=====================================================================

package com.test.springboot;
    @Controller
    public class StudentController {
        @Autowired
        private StudentDao studentDao;

        @RequestMapping("/")
        public String homePage() {
            return "home";
        }

edited Feb 25 '20 at 13:44

answered Feb 25 '20 at 12:57

Suresh yadav

1
2

Before posting an answer, it is a good idea to read the help section: https://stackoverflow.com/help/how-to-answer -- your answer has several problems (formatting, code only) – colidyre Feb 25 '20 at 13:19
sorry for that ... can you answer, what i need to change to run the above code – Suresh yadav Feb 25 '20 at 13:45

score 0 · Answer 13 · answered Nov 14 '20 at 06:35

When I add @ComponentScan("com.firstday.spring.boot.services") or scanBasePackages{"com.firstday.spring.boot.services"} jsp is not loaded. So when I add the parent package of project in @SpringBootApplication class it's working fine in my case

Code Example:-

package com.firstday.spring.boot.firstday;

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

@SpringBootApplication(scanBasePackages = {"com.firstday.spring.boot"})
public class FirstDayApplication {

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

}

Spring Boot @autowired does not work, classes in different package

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