这篇文章主要介绍“怎么用Java实现图书借阅系统”，在日常操作中，相信很多人在怎么用Java实现图书借阅系统问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”怎么用Java实现图书借阅系统”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
需要实现的功能有：
判断用户是否需要进行借书
在用户选择借书时，展示出图书列表
图书列表包含 图书序号、图书名称、借阅价格、作者
用户选择借书数量、并选择对应图书、借阅天数
计算出用户需支付金额
Book.java
package com.imooc; /** * 图书类 包含图书序号 名称 价格 * */ public class Book { private int id; private String name; private double price; private String author; public Book(int id, String name, double price, String author) { // TODO Auto-generated constructor stub this.id = id; this.setName(name); this.price = price; this.author = author; } public void setId(int id) { this.id = id; } public int getId() { return id; } public void setPrice(double price) { this.price = price; } public double getPrice() { return price; } public void setAuthor(String author) { this.author = author; } public String getAuthor() { return author; } public void setName(String name) { this.name = name; } public String getName() { return name; } }BorrowBooks.java
package com.imooc; import java.util.ArrayList; import java.util.List; import java.util.Scanner; public class BorrowBooks { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("~~~~~~~欢迎使用图书借阅系统~~~~~~~~ "); System.out.println("您是否要借书：1.是 >> 点击其他键退出"); BorrowBooks test = new BorrowBooks(); while (test.test1()) { System.out.println(">>>您可选择图书及其价目表："); System.out.println("-------------------------------------------"); Book[] books = { new Book(0, "红楼梦", 12, "曹雪芹"), new Book(1, "西游记", 12, "吴承恩"), new Book(2, "汉乡", 12, "孑与2"), new Book(3, "大魏宫廷", 12, "贱宗首席"), new Book(4, "三国演义", 12, "罗贯中"), new Book(5, "水浒传", 12, "施耐庵") }; System.out.println("序号" + " " + "\t" + "书名" + " " + "\t" + "租金" + " " + "\t" + "作者"); for (Book book : books) { if (book.getClass().equals(Book.class)) { System.out.println(book.getId() + "\t" + "\t" + book.getName() + "\t" + "\t" + book.getPrice() + "/天" + "\t" + "\t" + book.getAuthor() + "/著"); } } System.out.println("-------------------------------------------"); System.out.println("-->请输入你要借书的数量："); Scanner zScanner = new Scanner(System.in); int BookNum = zScanner.nextInt(); if (BookNum > 0) { List<Book> bookList = new ArrayList<Book>(); int add = 0; int bookPrice = 0; for (int i = 0; i < BookNum; i++) { System.out.println(">>请输入第" + (i + 1) + "本书的序号："); int num = zScanner.nextInt(); try { bookList.add(books[num]); System.out.println("----成功添加：" + bookList.get(add).getName()); if (books[num].getClass().equals(Book.class)) { bookPrice += ((Book) bookList.get(add)).getPrice(); } add++; } catch (Exception e) { // TODO: handle exception System.out.println("您输入的图书序号不正确"); i = i - 1; BookNum = BookNum; } } System.out.println("->请输入借阅的天数："); Scanner g = new Scanner(System.in); int bookDay = g.nextInt(); bookPrice = bookPrice * bookDay; System.out.println("------------借阅选书完成------------" + "\n" + "下面开始统计数据.........."); System.out.print("您借阅的图书" + BookNum + "本：" + " "); for (Book book : bookList) { System.out.println(book.getName() + " " + "\n"); } System.out.println(); System.out.println("共租用：" + bookDay + " 天"); System.out.println("需要付款：" + bookPrice + " 元"); System.out.println("->请输入付款金额："); System.out.println("------------"); Scanner x = new Scanner(System.in); int priceSpread = bookPrice - x.nextInt();//定义差价 while (bookPrice != x.nextInt()) System.out.println("------------" + "\n" + "输入错误，请重新输入金额！"); /* while (bookPrice != x.nextInt()) { if (bookPrice > x.nextInt()) { int priceSpread = bookPrice - x.nextInt();//定义差价 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元，还需支付" + priceSpread + "元"); } if (bookPrice <x.nextInt()) { int priceSpread = x.nextInt()-bookPrice ;//定义差价 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元，找您" + priceSpread + "元"); } */ System.out.println("------------"); System.out.println(" 交易成功！"); System.out.println(); System.out.println("------------感谢您的使用--------------"); System.out.println("………………继续借书请按1，退出请按其他键………………"); } else { System.out.println("您输入的借书数量为“0”，自动为您退出系统"); System.exit(0); } } } private static Object bookPrice(int nextInt) { // TODO Auto-generated method stub return null; } // 捕获输入参数不正确异常 public boolean test1() { try { Scanner z = new Scanner(System.in); if (z.nextInt() == 1) { return true; } else { return false; } } catch (Exception e1) { return false; } } }运行效果图
存在问题
在BorrowBooks.java这个Class中，下面这段代码本想实现判断用户输入的金额是否和应付金额一致，不一致时给出不同的回复，但是自己试了好多种方法，都没有实现，还是自己懂得太少：
while (bookPrice != x.nextInt()) { if (bookPrice > x.nextInt()) { int priceSpread = bookPrice - x.nextInt();//定义差价 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元，还需支付" + priceSpread + "元"); } if (bookPrice <x.nextInt()) { int priceSpread = x.nextInt()-bookPrice ;//定义差价 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元，找您" + priceSpread + "元"); } }到此，关于“怎么用Java实现图书借阅系统”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注亿速云网站，小编会继续努力为大家带来更多实用的文章！
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