JAVA 控制台 简单的图书管理系统

package com.tushugl.ui; import java.util.ArrayList; import java.util.Scanner; import com.tushugl.daos.Bookdao; import com.tushugl.vos.Book; class MainUi { static Scanner in = new Scanner(System.in); Bookdao dao = new Bookdao(); //打印界面 public void print() { System.out.println("*****************"); System.out.println("1 : 添加图书"); System.out.println("2 : 查询所有图书"); System.out.println("3 : 根据图书编号查询图书"); System.out.println("4 : 修改图书"); System.out.println("5 : 删除图书"); System.out.println("0 : 退出"); } //添加图书 public void addBook() { System.out.println("请输入图书的名称"); String bname = in.next(); System.out.println("请输入图书的价钱"); float price = in.nextFloat(); Book book = new Book(bname, price); boolean flag = dao.addBook(book); if (flag) { System.out.println("添加成功"); } else { System.out.println("添加失败"); } } //查询所有图书 public void queryAllBook() { ArrayList<Book> list = dao.queryAllBook(); for (int i = 0; i < list.size(); i++) { int id = list.get(i).getId(); String name = list.get(i).getName(); float price = list.get(i).getPrice(); System.out.println("编号：" + id + "，书名：" + name + "，价格：" + price); } } //根据编号查询图书 public void queryBookById() { System.out.println("请输入要查询的书号"); int id = in.nextInt(); Book bk = dao.queryBookById(id); if (bk != null) { System.out.println("编号：" + bk.getId() + "，书名：" + bk.getName() + "，价格：" + bk.getPrice()); } else { System.out.println("查找的图书不存在"); } } // 修改图书 public void modifyBook() { System.out.println("请输入要修改的图书的编号"); int id = in.nextInt(); System.out.println("请输入新的书名"); String name = in.next(); System.out.println("请输入新的价格"); float price = in.nextFloat(); int ret = dao.modifyBook(id, name, price); if (ret == 1) { System.out.println("修改成功"); } else { System.out.println("修改失败"); } } // 删除图书 public void deleteBook() { System.out.println("请输入如要删除的图书的图书号"); int id = in.nextInt(); int ret = dao.deleteBook(id); if (ret == 1) { System.out.println("删除成功"); } else { System.out.println("删除的图书不存在"); } } public static void main(String[] args) { MainUi mainui = new MainUi(); while (true) { mainui.print(); System.out.println("请选择你要进行的操作"); int choice = in.nextInt(); switch (choice) { case 1: mainui.addBook(); break; case 2: mainui.queryAllBook(); break; case 3: mainui.queryBookById(); break; case 4: mainui.modifyBook(); break; case 5: mainui.deleteBook(); break; case 0: System.exit(0); break; } } } }