书店管理系统图书的Java后台代码

以下是一个简单的图书店管理系统的Java后台代码示例：

Book.java:

public class Book {
    private int id;
    private String title;
    private String author;
    private double price;

    public Book(int id, String title, String author, double price) {
        this.id = id;
        this.title = title;
        this.author = author;
        this.price = price;
    }

    // Getters and setters

    public int getId() {
        return id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }
}

BookStore.java:

import java.util.ArrayList;
import java.util.List;

public class BookStore {
    private List<Book> books;

    public BookStore() {
        books = new ArrayList<>();
    }

    public void addBook(Book book) {
        books.add(book);
    }

    public void removeBook(int id) {
        for (Book book : books) {
            if (book.getId() == id) {
                books.remove(book);
                return;
            }
        }
    }

    public Book getBookById(int id) {
        for (Book book : books) {
            if (book.getId() == id) {
                return book;
            }
        }
        return null;
    }

    public List<Book> getAllBooks() {
        return new ArrayList<>(books);
    }
}

BookController.java:

import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/books")
public class BookController {
    private BookStore bookStore;

    public BookController() {
        bookStore = new BookStore();
    }

    @GetMapping("/")
    public List<Book> getAllBooks() {
        return bookStore.getAllBooks();
    }

    @GetMapping("/{id}")
    public Book getBookById(@PathVariable int id) {
        return bookStore.getBookById(id);
    }

    @PostMapping("/")
    public void addBook(@RequestBody Book book) {
        bookStore.addBook(book);
    }

    @DeleteMapping("/{id}")
    public void removeBookById(@PathVariable int id) {
        bookStore.removeBook(id);
    }
}

这个示例包括一个Book类，一个BookStore类和一个BookController类。Book类表示一本书，包括书的ID，标题，作者和价格。BookStore类表示整个书店，可以添加，删除和检索书籍。BookController类是一个RESTful风格的控制器，暴露了一些RESTful API来管理BookStore中的书籍。