网上购书系统设计（java）

伴随互联网的蓬勃发展，网络购书系统作为电子商务的一种形式，正以其高效、低成本的优势逐步成为新兴的经营模式，人们已经不再满足互联网的用途仅仅局限于信息的浏览和发布，更渴望着能够充分享受互联网所带来的更多便利。网络购书系统正适应了当今社会快节奏地生活，使顾客足不出户便可以方便快捷轻松地选购自己喜欢的图书。

本任务使用所学知识编写一个基于控制台的购书系统，实现购书功能。输出所有图书的信息：包括每本书的编号、书名、单价、库存。

顾客购买书时，根据提示输入图书编号来选购需要的书，并根据提示输入购买书的的数量。

购买完毕后输出顾客的订单信息，包括：订单号、订单明细、订单总额。

源代码：

package Bookstore;public class OrderItem {Book book;int num;OrderItem(Book book,int num){this.book=book;this.num=num;}void setBook(Book book){this.book=book;}void setNum(int num){this.num=num;}Book getBook(){return this.book;}int getNum(){return this.num;}
}package Bookstore;public class Book {String id;String name;float price;int storage;public Book(String id,String name,float price,int storage) {this.id=id;this.name=name;this.price=price;this.storage=storage;}void setStorage(int storage){this.storage=storage;}int getStorage(){return this.storage;}double getPrice() {return price;}String getName() {return name;}}package Bookstore;
import java.util.Scanner;public class Order {String orderId;OrderItem items[];double total;public Order(String orderId){ this.orderId = orderId;this.items = new OrderItem[3];}public String getOrderId() {return orderId;}public OrderItem[] getItems() {return items;}public double getTotal() {calTotal();return total;}public void setItem(OrderItem item, int i) {this.items[i] = item;}public void calTotal() {double total = 0;for (int i = 0; i < items.length; i ++) {total += items[i].getNum() * items[i].getBook().getPrice();}this.total = total;}public static void main(String[] args) {Book books[] = new Book[3];outBooks(books);Order order = purchase(books);outOrder(order);}public static Order purchase(Book books[]) {Order order = new Order("00001");OrderItem item = null;Scanner in = new Scanner(System.in);for (int i = 0; i < 3; i ++) {System.out.println("请输入图书编号选择图书：");int cno = in.nextInt();System.out.println("请输入购买图书数量：");int pnum = in.nextInt();item = new OrderItem(books[cno-1],pnum);order.setItem(item, i);System.out.println("请继续购买图书。");}in.close();return order;}public static void outOrder(Order order) {System.out.println("\n\t图书订单");System.out.println("图书订单号："+order.getOrderId());System.out.println("图书名称\t购买数量\t图书单价");OrderItem items[] = order.getItems();for(int i = 0; i < items.length; i ++) {System.out.println(items[i].getBook().getName()+"\t"+items[i].getNum()+"\t"+items[i].getBook().getPrice());//System.out.println("\n");}System.out.println("---------------------------------------");System.out.println("订单总额：\t"+order.getTotal());}public static void outBooks(Book books[]) {books[0] = new Book("1","哈利波特与死亡圣器", (float) 68.8,100);books[1] = new Book("2","杀死一只知更鸟", (float) 108.9,400);books[2] = new Book("3","月亮与六便士", (float) 542.9,200);System.out.println("\t图书列表");System.out.println("图书编号\t图书名称\t\t图书单价\t库存数量");System.out.println("---------------------------------------");for (int i = 0; i < books.length; i ++) {System.out.println(i+1+"\t"+books[i].getName()+"\t"+books[i].getPrice()+"\t"+books[i].getStorage());}}}

运行结果截图：