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Annotations

@ComponentScan(basePackages = {"<pacakge>",...}) This will override the default behavior of @SpringBootApplication annotation. So need to add all necessary packages.

@ImportResource("classpath:<resource name>")

Spring Data JPA

@Entity

@Id
@GeneratedValue(strategy = GenerationType.AUTO)

@ManyToMany
@JoinTable(name = "author_book", joinColumns = @JoinColumn(name = "book_id"),
            inverseJoinColumns = @JoinColumn(name = "author_id"))

@ManyToMany(mappedBy = "authors")

DI

@Qualifier("constructorGreetingService) @Primary

H2 database

localhost:8080/h2-console JDBC URL: jdbc:h2:mem:testdb

Repository Layer

public interface BookRepository extends CrudRepository<Book, Long>

Bootstrapping DB with mock data

public class DevBootStrap implements ApplicationListener<ContextRefreshedEvent>

Profiles

@Profile("en") spring.profiles.active=es @Profile({"en", "default"})

Thymeleaf

<html lang="en" xmlns:th="http;//www.thymeleaf.org">

<tbody>
    <tr th:each="owner : ${owners}">
        <td th:text="${owner?.id}">1</td>
        <td th:text="${owner?.firstName}">Panda</td>
        <td th:text="${owner?.lastName}">Karady</td>
    </tr>
</tbody>