I am using spring boot v2.5.2. Below is my folder structure and code. This is simple test project.
My folder structure:
RESTController Class:
package com.user.UserManagementSystem.controller;
import com.user.UserManagementSystem.model.User;
import com.user.UserManagementSystem.service.UserServiceImpl;
import java.util.List;
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("/api/v1/")
public class UserController {
@Autowired
private UserServiceImpl userRepository;
@GetMapping("/getAllUsers")
public List<User> getAllUsers() {
return userRepository.getUsers();
}
@GetMapping("/")
public String home() {
return "Hello";
}
}
User.java
package com.user.UserManagementSystem.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name= "Users")
public class User {
public User() {
}
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@Column(name ="userName")
private String userName;
@Column(name ="name")
private String name;
@Column(name ="language")
private String language;
@Column(name ="mobileNumber")
private int mobileNumber;
public User(String userName, String name, String language, int mobileNumber) {
this.userName = userName;
this.name = name;
this.language = language;
this.mobileNumber = mobileNumber;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLanguage() {
return language;
}
public void setLanguage(String language) {
this.language = language;
}
public int getMobileNumber() {
return mobileNumber;
}
public void setMobileNumber(int mobileNumber) {
this.mobileNumber = mobileNumber;
}
}
UserRepository.java
package com.user.UserManagementSystem.repository;
import com.user.UserManagementSystem.model.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface UserRepository extends JpaRepository<User, Long>{
}
UserService.java
package com.user.UserManagementSystem.service;
import com.user.UserManagementSystem.model.User;
import java.util.List;
public interface UserService {
List<User> getUsers();
User getUserById(Long id);
User addUser(User user);
void deleteUser(Long id);
}
UserServiceImpl.java
package com.user.UserManagementSystem.service;
import com.user.UserManagementSystem.repository.UserRepository;
import com.user.UserManagementSystem.model.User;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class UserServiceImpl implements UserService{
@Autowired
UserRepository userRepository;
@Override
public List<User> getUsers() {
return userRepository.findAll();
}
@Override
public User getUserById(Long id) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public User addUser(User user) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void deleteUser(Long id) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
UserManangmentSystemApplication.java
package com.user.UserManangmentSystem;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication(scanBasePackages = {"com.user.UserManangmentSystem", "com.user.UserManagementSystem.controller", "com.user.UserManagementSystem.repository", "com.user.UserManagementSystem.service"})
//@SpringBootApplication
public class UserManangmentSystemApplication {
public static void main(String[] args) {
SpringApplication.run(UserManangmentSystemApplication.class, args);
}
}
application.properties:
spring.datasource.url=jdbc:mariadb://localhost:3306/ums
spring.datasource.username=ums
spring.datasource.password=ums
spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDB53Dialect
server.port=8888
debug=true
When it build the project i am getting :
Caused by:
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.user.UserManagementSystem.repository.UserRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1790) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1346) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657) ~[spring-beans-5.3.8.jar:5.3.8]
Thanks in Advance.
