Spring Boot Integration With MongoDB as a Maven Project

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "book")
public class Book {
  
    @Id
    private String id;

    private long bookId;

    private String isbnNumber;

    private String category;

    private String bookName;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public long getBookId() {
        return bookId;
    }

    public void setBookId(long bookId) {
        this.bookId = bookId;
    }

    public String getIsbnNumber() {
        return isbnNumber;
    }

    public void setIsbnNumber(String isbnNumber) {
        this.isbnNumber = isbnNumber;
    }

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public String getBookName() {
        return bookName;
    }

    public void setBookName(String bookName) {
        this.bookName = bookName;
    }
}

import java.util.List;
import org.springframework.data.mongodb.repository.MongoRepository;
import com.gfg.docs.Book;

public interface BookRepository extends MongoRepository<Book,Long> {
    // Need to add all the required methods here
    List<Book> findByCategory(String category);
    Book findByBookId(long bookId);
}

import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.gfg.docs.Book;
import com.gfg.repository.BookRepository;

@Service
public class BookService {
    @Autowired
    BookRepository bookRepository;
    public List<Book> getAllBooks(){
        return bookRepository.findAll();
    }

    // Getting a specific book by category from collection
    public List<Book> getBookByCategory(String category){
        List<Book> book = bookRepository.findByCategory(category);
        return book;
    }

    // Getting a specific book by book id from collection
    public Book getBookByBookId(long bookId){
        Book book = bookRepository.findByBookId(bookId);
        return book;
    }
    
      // Adding/inserting a book into collection
    public Book addBook(long id,String isbnNumber, String bookName,String category) {
        Book book = new Book();
        book.setCategory(category);
        book.setBookId(id);
        book.setBookName(bookName);
        book.setIsbnNumber(isbnNumber);
        return bookRepository.save(book);
    }
  
    // Delete a book from collection
    public int deleteBook(long bookId){
        Book book = bookRepository.findByBookId(bookId);
        if(book != null){
            bookRepository.delete(book);
            return 1;
        }
        return -1;
    }
}

import com.gfg.docs.Book;
import com.gfg.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;

@RestController
public class BookController {

    @Autowired
    BookService bookService;
    @RequestMapping("/getAllBooks")
    @ResponseBody
    public List<Book> getBooks(){
        return bookService.getAllBooks();
    }

    @RequestMapping("/getBook")
    @ResponseBody
    public List<Book> getBook(@RequestParam("category") String category){
        return bookService.getBookByCategory(category);
    }

    @RequestMapping("/getBookById")
    @ResponseBody
    public Book getBookById(@RequestParam("bookId") long bookId){
        return bookService.getBookByBookId(bookId);
    }

    @RequestMapping("/addBook")
    @ResponseBody
    public String addBook(@RequestParam("bookId") long bookId,@RequestParam("isbnNumber") String isbnNumber,
                          @RequestParam("bookName") String bookName,
                          @RequestParam("category") String category){
        if(bookService.addBook(bookId,isbnNumber,bookName,category) != null){
            return "Book got  Added Successfully";
        }else{
            return "Something went wrong !";
        }
    }
  
    @RequestMapping("/deleteBook")
    @ResponseBody
    public String deleteBook(@RequestParam("bookId") int bookId){
        if(bookService.deleteBook(bookId) == 1){
            return "Book got  Deleted Successfully";
        }else{
            return "Something went wrong !";
        }
    }
}

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}