Eddig működik

pom.xml

@@ -42,6 +42,7 @@
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 
+
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>

src/main/java/guru/springframework/spring5webapp/bootstrap/BootStrapData.java

@@ -0,0 +1,70 @@
+package guru.springframework.spring5webapp.bootstrap;
+
+import guru.springframework.spring5webapp.domain.Author;
+import guru.springframework.spring5webapp.domain.Book;
+import guru.springframework.spring5webapp.domain.Publisher;
+import guru.springframework.spring5webapp.repositories.AuthorRepository;
+import guru.springframework.spring5webapp.repositories.BookRepository;
+import guru.springframework.spring5webapp.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
+    {
+        System.out.println("Started a Bootstrap");
+        Publisher publisher = new Publisher();
+        publisher.setName("SFG Publishing");
+        publisher.setCity("St Petersburg");
+        publisher.setState("FL");
+
+        publisherRepository.save(publisher);
+
+        System.out.println("Publisher count: "+publisherRepository.count());
+
+        Author eric= new Author("Eric","Evans");
+        Book ddd= new Book("Domain driven design","12345");
+        eric.getBooks().add(ddd);
+        ddd.getAuthors().add(eric);
+
+        //miután beállítottuk a Book és a PUblisher közötti sok-egy kapcsolatot, és Joincolumnot is beállítottuk
+        ddd.setPublisher(publisher);
+        publisher.getBooks().add(ddd);
+
+
+        authorRepository.save(eric);
+        bookRepository.save(ddd);
+        publisherRepository.save(publisher);
+
+
+        Author lewis= new Author("C.S","Lewis");
+        Book sbj= new Book("Suprised by joy","12347");
+        lewis.getBooks().add(sbj);
+        sbj.getAuthors().add(lewis);
+
+        sbj.setPublisher(publisher);
+        publisher.getBooks().add(sbj);
+
+// fontos a mentési sorrend ha 'publisherRepository.save(publisher);' feljebb van nem működik
+        authorRepository.save(lewis);
+        bookRepository.save(sbj);
+        publisherRepository.save(publisher);
+
+
+        System.out.println("Number of books:"+bookRepository.count());
+        System.out.println("Publisher Number of books: "+publisher.getBooks().size());
+    }
+}

src/main/java/guru/springframework/spring5webapp/controllers/BookController.java

@@ -0,0 +1,29 @@
+package guru.springframework.spring5webapp.controllers;
+
+// Spring MVC controllers
+import guru.springframework.spring5webapp.repositories.BookRepository;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+public class BookController {
+
+    private final BookRepository bookRepository;
+
+    public BookController(BookRepository bookRepository) {
+        this.bookRepository = bookRepository;
+    }
+
+    @RequestMapping("/books")
+    public String getBooks(Model model)
+  {
+
+
+      model.addAttribute("books",bookRepository.findAll());
+
+      return "books";
+  }
+
+
+}

src/main/java/guru/springframework/spring5webapp/domain/Author.java

@@ -0,0 +1,83 @@
+package guru.springframework.spring5webapp.domain;
+
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+@Entity
+public class Author {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO) //automatikus id generálás (mint az adatb-ban)
+    private Long id;
+    private String firstname;
+    private  String lastname;
+
+    @ManyToMany(mappedBy = "authors")
+    private Set<Book> books=new HashSet<>();
+
+    public Author() {
+    }
+
+    public Author(String firstname, String lastname) {
+        this.firstname = firstname;
+        this.lastname = lastname;
+
+    }
+
+    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;
+    }
+
+    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 boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Author author = (Author) o;
+
+        return id != null ? id.equals(author.id) : author.id == null;
+    }
+
+    @Override
+    public int hashCode() {
+        return id != null ? id.hashCode() : 0;
+    }
+}

src/main/java/guru/springframework/spring5webapp/domain/Book.java

@@ -0,0 +1,98 @@
+package guru.springframework.spring5webapp.domain;
+
+import javax.persistence.*;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+public class Book {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    private String title;
+    private  String isbn;
+    @ManyToOne // sok könyv lehet, de egy könyvhöz csak egy kiadó tartozik
+    private Publisher publisher;
+
+    @ManyToMany
+    @JoinTable(name = "author_book", joinColumns = @JoinColumn(name = "book_id"),
+            inverseJoinColumns = @JoinColumn (name = "author_id"))
+
+     private Set<Author> authors = new HashSet<>();
+
+    public Book() {
+    }
+
+    public Book(String title, String isbn) {
+        this.title = title;
+        this.isbn = isbn;
+
+    }
+
+    public Publisher getPublisher() {
+        return publisher;
+    }
+
+    public void setPublisher(Publisher publisher) {
+        this.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;
+    }
+
+    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 boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Book book = (Book) o;
+
+        return id != null ? id.equals(book.id) : book.id == null;
+    }
+
+    @Override
+    public int hashCode() {
+        return id != null ? id.hashCode() : 0;
+    }
+}