图书销售系统（Java课设）

import java.util.List; import java.util.Scanner; public class AdminPermissionImpl implements AdminPermission { //获取List集合 public static List<Book> list = Book.getBookList(); //用于控制台输入 public static Scanner scanner = new Scanner(System.in); //自增id public int id = 0; //入库 @Override public void enterWarehouse() { System.out.println("请输入入库的图书id号"); int id=scanner.nextInt(); System.out.println("请输入入库的数量"); int num=scanner.nextInt(); for (Book book : list) { if (book.getId() == id){ book.setNum(book.getNum()+num); System.out.println("入库成功！"); }else { System.out.println("没有这个图书id号，请重新输入！"); } } Menu.adminMenu(User.getUserMap().get("admin")); } //出库 @Override public void outWarehouse() { System.out.println("请输入出库的图书id号"); int id=scanner.nextInt(); System.out.println("请输入出库的数量"); int num=scanner.nextInt(); for (Book book : list) { if (book.getId() == id){ if (book.getNum()>=num){ book.setNum(book.getNum()-num); System.out.println("出库成功！"); }else { System.out.println("库存不足！"); } }else { System.out.println("没有这个图书id号，请重新输入！"); } } Menu.adminMenu(User.getUserMap().get("admin")); } //新增图书 @Override public void insertBook() { System.out.println("请输入图书名称"); String name=scanner.next(); System.out.println("请输入图书作者"); String author=scanner.next(); System.out.println("请输入图书出版日期"); String pub_date=scanner.next(); System.out.println("请输入图书价格"); double price=scanner.nextDouble(); System.out.println("请输入图书数量"); int num=scanner.nextInt(); //封装对象 Book book = new Book(this.id+1, name, author, pub_date, price ,num); //存到集合 list.add(book); System.out.println("添加图书成功！"); Menu.adminMenu(User.getUserMap().get("admin")); } //查询全部图书 @Override public void selectBook() { //判断有数据 if (list.size()>0){ System.out.println("---------------------------------查询结果如下所示---------------------------------"); //遍历集合 for (Book book : list) { System.out.println(book.toString()); } }else { System.out.println("没有任何的数据信息！"); } Menu.adminMenu(User.getUserMap().get("admin")); } //根据id查询图书 @Override public void selectById() { System.out.println("请输入需要查询图书的id号"); int id=scanner.nextInt(); for (Book book : list) { if (book.getId() == id){ System.out.println("---------------------------------查询结果如下所示---------------------------------"); System.out.println(book.toString()); }else { System.out.println("不存在这本图书！！"); } } Menu.adminMenu(User.getUserMap().get("admin")); } }