<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.3.9</version>
</dependency>
properties
spring.datasource.url=jdbc:mysql://localhost:3306/mydatabase
spring.datasource.username=root
spring.datasource.password=secret
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
@Entity
@Table(name = "employees")
public class Employee {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "name")
private String name;
}
@Repository
public interface EmployeeRepository extends JpaRepository<Employee, Long> {
List<Employee> findByName(String name);
List<Employee> findByDepartment(String department);
}
@Service
public class EmployeeService {
private final EmployeeRepository employeeRepository;
public EmployeeService(EmployeeRepository employeeRepository) {
this.employeeRepository = employeeRepository;
}
@Transactional
public void saveEmployee(Employee employee) {
employeeRepository.save(employee);
}
@Transactional(readOnly = true)
public List<Employee> getAllEmployees() {
return employeeRepository.findAll();
}
}
@Configuration
@EnableJpaRepositories(basePackages = "com.example.repositories")
@EntityScan(basePackages = "com.example.entities")
public class AppConfig {
@Bean
public DataSource dataSource() {
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
}
@Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
}
}
