working jpa mvc app

pom.xml

@@ -32,6 +32,14 @@
             <artifactId>h2</artifactId>
             <scope>runtime</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-h2console</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa-test</artifactId>

src/main/java/guru/springframework/spring7webapp/bootstrap/BootstrapData.java

@@ -0,0 +1,75 @@
+package guru.springframework.spring7webapp.bootstrap;
+
+import guru.springframework.spring7webapp.domain.Author;
+import guru.springframework.spring7webapp.domain.Book;
+import guru.springframework.spring7webapp.domain.Publisher;
+import guru.springframework.spring7webapp.repositories.AuthorRepository;
+import guru.springframework.spring7webapp.repositories.BookRepository;
+import guru.springframework.spring7webapp.repositories.PublisherRepository;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+@Component
+public class BootstrapData implements CommandLineRunner {
+    private final AuthorRepository authorRepository;
+    private final BookRepository bookRepository;
+    private final PublisherRepository publisherRepository;
+
+    public BootstrapData(
+            AuthorRepository authorRepository,
+            BookRepository bookRepository,
+            PublisherRepository publisherRepository
+    ) {
+        this.authorRepository = authorRepository;
+        this.bookRepository = bookRepository;
+        this.publisherRepository = publisherRepository;
+    }
+
+    @Override
+    public void run(String... args) throws Exception {
+        Author joop = new Author();
+        joop.setFirstName("Joop");
+        joop.setLastName("Appelstroop");
+
+        Book ddd = new Book();
+        ddd.setTitle("DomainDrivenDesign");
+        ddd.setIsbn("123128384");
+
+        Author joopSaved = authorRepository.save(joop);
+        Book dddSaved = bookRepository.save(ddd);
+
+        Author piet = new Author();
+        piet.setFirstName("Piet");
+        piet.setLastName("Vergeetmijniet");
+
+        Book edd = new Book();
+        edd.setTitle("Event Driven Design");
+        edd.setIsbn("01293434597");
+
+        Author pietSaved = authorRepository.save(piet);
+        Book eddSaved = bookRepository.save(edd);
+
+        Publisher publisher = new Publisher();
+        publisher.setAddress("teststreet 26");
+        publisher.setCity("New York");
+        publisher.setState("New York");
+        publisher.setPublisherName("El publicity");
+
+        Publisher savedPublisher = publisherRepository.save(publisher);
+
+        dddSaved.setPublisher(savedPublisher);
+        eddSaved.setPublisher(savedPublisher);
+
+        Book test = bookRepository.save(eddSaved);
+        Book test2 = bookRepository.save(dddSaved);
+        authorRepository.save(joopSaved);
+        authorRepository.save(pietSaved);
+
+        System.out.println("Authors count: " + authorRepository.count());
+        System.out.println("Book count: " + bookRepository.count());
+        System.out.println("Publisher count: " + publisherRepository.count());
+
+        System.out.println("Publisher count: " + test.getPublisher().getPublisherName());
+        System.out.println("Publisher count: " + test2.getPublisher().getPublisherName());
+    }
+}

src/main/java/guru/springframework/spring7webapp/controllers/AuthorController.java

@@ -0,0 +1,23 @@
+package guru.springframework.spring7webapp.controllers;
+
+import guru.springframework.spring7webapp.services.AuthorService;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+public class AuthorController {
+
+    private final AuthorService authorService;
+
+    public AuthorController(AuthorService authorService) {
+        this.authorService = authorService;
+    }
+
+    @RequestMapping(path = "/authors")
+    public String authors(Model model) {
+        model.addAttribute("authors", this.authorService.findAll());
+
+        return "authors";
+    }
+}

src/main/java/guru/springframework/spring7webapp/controllers/BookController.java

@@ -0,0 +1,25 @@
+package guru.springframework.spring7webapp.controllers;
+
+import guru.springframework.spring7webapp.domain.Book;
+import guru.springframework.spring7webapp.services.Bookservice;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+public class BookController {
+
+    private final Bookservice bookservice;
+
+    public BookController(Bookservice bookservice) {
+        this.bookservice = bookservice;
+    }
+
+    @RequestMapping(path = "/books")
+    public String getBooks(Model model) {
+        model.addAttribute("books", this.bookservice.findAll());
+
+        return "books";
+    }
+}

src/main/java/guru/springframework/spring7webapp/domain/Author.java

@@ -0,0 +1,76 @@
+package guru.springframework.spring7webapp.domain;
+
+import jakarta.persistence.*;
+
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+
+@Entity
+public class Author {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(nullable = false)
+    private Long id;
+
+    private String firstName;
+    private String lastName;
+
+    @ManyToMany(mappedBy = "authors")
+    private Set<Book> books;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public Set<Book> getBooks() {
+        return books = new HashSet<>();
+    }
+
+    public void setBooks(Set<Book> books) {
+        this.books = books;
+    }
+
+    @Override
+    public String toString() {
+        return "Author{" +
+                "id=" + id +
+                ", firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                ", books=" + books +
+                '}';
+    }
+
+    @Override
+    public final boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Author author)) return false;
+
+        return Objects.equals(getId(), author.getId());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(getId());
+    }
+}

src/main/java/guru/springframework/spring7webapp/domain/Book.java

@@ -0,0 +1,93 @@
+package guru.springframework.spring7webapp.domain;
+
+import jakarta.persistence.*;
+
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+
+@Entity
+public class Book {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(nullable = false)
+    private Long id;
+
+    private String title;
+    private String isbn;
+
+    @ManyToMany
+    @JoinTable(
+            name = "author_book",
+            joinColumns = @JoinColumn(name = "book_id"),
+            inverseJoinColumns = @JoinColumn(name = "author_id")
+    )
+    private Set<Author> authors;
+
+    @ManyToOne
+    @JoinColumn(name = "publisher_id")
+    private Publisher publisher;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+    public Set<Author> getAuthors() {
+        return authors = new HashSet<>();
+    }
+
+    public void setAuthors(Set<Author> authors) {
+        this.authors = authors;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" +
+                "id=" + id +
+                ", title='" + title + '\'' +
+                ", isbn='" + isbn + '\'' +
+                ", authors=" + authors +
+                '}';
+    }
+
+    @Override
+    public final boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Book book)) return false;
+
+        return Objects.equals(getId(), book.getId());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(getId());
+    }
+
+    public Publisher getPublisher() {
+        return publisher;
+    }
+
+    public void setPublisher(Publisher publisher) {
+        this.publisher = publisher;
+    }
+}