My Spring Boot application will not start because a bean could not be found. I have done a lot of investigation and have had many attempts at trying to solve the issue, but none have worked. Below are what the common issues appear to be (and why they haven't solved it for me). Any help or suggestions would be hugely appreciated.
Potential causes of the issue
Not declaring the main class in the correct location
My folder structure is shown below. I believe this is structure should avoid any NoSuchBeanDefinitionException problems. It may also be worth mentioning here that this is not my entire project. Just the files I think are relevant to this issue.
Folder structure
src/ ├── main/ │ └── java/ | ├── mygroup.tqbcbackend/ | | └── TqbcBackendApplication.java | ├── mygroup.tqbcbackend.model/ | | └── Team.java | ├── mygroup.tqbcbackend.controller/ | | └── TeamController.java | └── mygroup.tqbcbackend.repository/ | └── TeamRepository.java └── resources/ └── application.propertiesClasses are not declared with annotations such as @Repository
My code is below, I don't believe this is true
This answer suggested removing @Autowired from above
private TeamRepository teamRepository;in TeamController.javaThis did actually cause the application to start, but down the line a
java.lang.NullPointerExceptionwas returned when callingteamRepository.findAll();
Error
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.6.3)
2022-06-20 22:54:18.006 INFO 23052 --- [ restartedMain] m.tqbcbackend.TqbcBackendApplication : Starting TqbcBackendApplication using Java 11.0.15 on OD with PID 23052 (C:\Dev\TheQBCarousel\tqbc-backend\target\classes started by odern in C:\Dev\TheQBCarousel\tqbc-backend)
2022-06-20 22:54:18.007 INFO 23052 --- [ restartedMain] m.tqbcbackend.TqbcBackendApplication : No active profile set, falling back to default profiles: default
2022-06-20 22:54:18.065 INFO 23052 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2022-06-20 22:54:18.067 INFO 23052 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2022-06-20 22:54:19.613 INFO 23052 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2022-06-20 22:54:19.623 INFO 23052 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2022-06-20 22:54:19.624 INFO 23052 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.56]
2022-06-20 22:54:19.867 INFO 23052 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2022-06-20 22:54:19.867 INFO 23052 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1800 ms
2022-06-20 22:54:20.117 WARN 23052 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'teamController': Unsatisfied dependency expressed through field 'teamRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'mygroup.tqbcbackend.repository.TeamRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2022-06-20 22:54:20.122 INFO 23052 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
***************************
APPLICATION FAILED TO START
***************************
Description:
Field teamRepository in mygroup.tqbcbackend.controller.TeamController required a bean of type 'mygroup.tqbcbackend.repository.TeamRepository' 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 'mygroup.tqbcbackend.repository.TeamRepository' in your configuration.
TeamController.java
package mygroup.tqbcbackend.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import mygroup.tqbcbackend.model.Team;
import mygroup.tqbcbackend.repository.TeamRepository;
@CrossOrigin(origins = "*")
@RestController
@RequestMapping("/api/v1/teams")
public class TeamController {
@Autowired
private TeamRepository teamRepository;
// Get all teams
@GetMapping("/all")
public List<Team> getAllTeams() {
return teamRepository.findAll();
}
// Get all active teams
@GetMapping("/active")
public List<Team> getAllActiveTeams() {
return teamRepository.findByIsActiveTrue();
}
}
TeamRepository.java
package mygroup.tqbcbackend.repository;
import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import mygroup.tqbcbackend.model.Team;
@Repository
public interface TeamRepository extends JpaRepository<Team,String>{
public List<Team> findByIsActiveTrue();
}
TqbcBackendApplication.java
package mygroup.tqbcbackend;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class TqbcBackendApplication {
public static void main(String[] args) {
SpringApplication.run(TqbcBackendApplication.class, args);
}
}
application.properties
####### Data-Source Properties #######
spring.datasource.url=jdbc:mysql://localhost:3306/the_qb_carousel?useSSL=false&allowPublicKeyRetrieval=true
spring.datasource.username=root
spring.datasource.password=mypassword
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
###### JPA Properties ######
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
# Stops SQL column names being automatically renamed to snake case
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
spring.jpa.hibernate.ddl-auto=update
#
spring.jpa.properties.hibernate.jdbc.batch_size=16
logging.level.org.hibernate.persister.entity=ERROR
#logging.level.org.hibernate.SQL=DEBUG
#logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE
#logging.level.org.hibernate.type=TRACE
###### App Properties ######
tqdm.app.jwtSecret= VerySecretKey
tqdm.app.jwtExpirationMs= 86400000
tqdm.app.frontEndURL=http://localhost:8081
###### Email Properties ######
spring.mail.host = smtp.gmail.com
spring.mail.port = 587
spring.mail.properties.mail.smtp.starttls.enable = true
spring.mail.username = [email protected]
spring.mail.password = password
spring.mail.properties.mail.smtp.starttls.required = true
spring.mail.properties.mail.smtp.auth = true
spring.mail.properties.mail.smtp.connectiontimeout = 5000
spring.mail.properties.mail.smtp.timeout = 5000
spring.mail.properties.mail.smtp.writetimeout = 5000
CodePudding user response：
Hmm..., this should work? Well you can force Spring to look up specific packages for Repositories. Try @EnableJpaRepositories("mygroup.tqbcbackend.repository") on your main.
Stolen from example 12 of Spring Boot Documetation