65 lines
2.5 KiB
Java
65 lines
2.5 KiB
Java
package chapter3.demo31;
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import java.util.Scanner;
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public class PayBooks {
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public static void main(String[] args) {
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Book[] books = new Book[3];
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// 模拟从数据库中读取图书信息并输出
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outBooks(books);
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// 顾客购买图书
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Order order = purchase(books);
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// 输出订单信息
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outOrder(order);
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}
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// 顾客购买图书
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public static Order purchase(Book[] books) {
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Order order = new Order("00001");
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OrderItem item = null;
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Scanner in = new Scanner(System.in);
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for (int i = 0; i < 3; i++) {
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System.out.println("请输入图书编号选择图书：");
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int cno = in.nextInt();
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System.out.println("请输入购买图书数量：");
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int pnum = in.nextInt();
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item = new OrderItem(books[cno - 1], pnum);
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order.setItem(item, i);
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System.out.println("请继续购买图书。");
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}
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in.close();
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return order;
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}
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// 输出订单信息
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public static void outOrder(Order order) {
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System.out.println("\n===================图书订单===================");
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System.out.println("图书订单号：" + order.getOrderId());
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System.out.println("图书名称\t购买数量\t图书单价");
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System.out.println("--------------------------------------");
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OrderItem[] items = order.getItems();
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for (OrderItem item : items) {
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System.out.println(
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item.getBook().getName() + "\t" + item.getNum() + "\t" + item.getBook().getPrice());
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}
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System.out.println("---------------------------------------");
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System.out.println("订单总额：\t\t" + order.getTotal());
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}
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// 模拟从数据库中读取图书信息并输出
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public static void outBooks(Book[] books) {
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books[0] = new Book(1, "Java教程", 30.6, 30);
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books[1] = new Book(2, "JSP教程", 42.1, 40);
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books[2] = new Book(3, "SSH架构", 47.3, 15);
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System.out.println("===================图书列表===================");
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System.out.println("图书编号\t图书名称\t\t图书单价\t库存数量");
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System.out.println("---------------------------------------");
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for (int i = 0; i < books.length; i++) {
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System.out.println(
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i + 1 + "\t" + books[i].getName() + "\t" + books[i].getPrice() + "\t" + books[i].getStorage());
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}
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System.out.println("---------------------------------------");
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}
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}
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