Write a program to create simple CRUD (Create, Read, Update, and Delete) application using Spring Boot and Hibernate for Online Library Management. Make necessary assumptions required.

Here's a basic implementation of a CRUD (Create, Read, Update, and Delete) application using Spring Boot and Hibernate for an Online Library Management system:

 // Book.java (Entity class) @Entity public class Book {     @Id     @GeneratedValue(strategy = GenerationType.IDENTITY)     private Long id;     private String title;     private String author;     private String isbn;     // Getters and setters } // BookRepository.java @Repository public interface BookRepository extends JpaRepository<Book, Long> {     // Additional custom query methods can be defined here } // BookService.java @Service public class BookService {     private final BookRepository bookRepository;     public BookService(BookRepository bookRepository) {         this.bookRepository = bookRepository;     }  ________ _________ ___ ________ _____ ____.
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