控制台版图书管理系统

package view; import java.text.SimpleDateFormat; import java.util.Date; import java.util.InputMismatchException; import java.util.List; import java.util.Scanner; import controller.BookController; import controller.UserController; import entry.Book; public class BookManageView { private Scanner sc = new Scanner(System.in); private BookController bController = new BookController(); private UserController uController = new UserController(); private int key = 0;// 用来记录用户的登录状态,0表示未登录,1表示已登录 public void printMain() { System.out.println("------欢迎使用图书管理系统------"); System.out.println("1.查询所有图书 2.按类别查询图书 3.添加图书 4.更新图书 5.删除图书"); System.out.println("6.借书 7.还书 "); System.out.println("8.退出登录 0.退出"); } public void printloginAndReg() { System.out.println("1.注册 2.登录"); System.out.println("0.返回"); } public void selectAll() { List<Book> books = bController.selectAll(); System.out.println("编号" + "\t" + "书名" + "\t\t" + "价格" + "\t" + "添加时间" + "\t\t\t" + "类型"); for (Book book : books) { System.out.println(book); } } public void selectByType() { System.out.println("请输入您要查询的类别:"); String type = sc.next(); List<Book> books = bController.selectAll(type); if (books.size() == 0) System.out.println("该类别暂时没有图书"); for (Book book : books) { System.out.println(book); } } public void addBook() { System.out.println("请输入图书名字:"); String bname = sc.nextLine(); System.out.println("请输入图书价格:"); Double bprice = sc.nextDouble(); sc.nextLine(); System.out.println("请输入图书类别:"); String type = sc.nextLine(); String addtime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()); Book book = new Book(0, bname, bprice, addtime, "0", 0, type); boolean flag = bController.addBook(book); if (flag) { System.out.println("添加成功"); } else { System.out.println("添加失败"); } } public void updateBook() { selectAll(); System.out.println("请输入您想要修改的图书名字:"); String name = sc.nextLine(); System.out.println("请输入新的图书名字:"); String bname = sc.nextLine(); System.out.println("请输入新的价格:"); Double bprice = sc.nextDouble(); sc.nextLine(); System.out.println("请输入图书类型:"); String type = sc.nextLine(); String updatetime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()); boolean flag = bController.updateBook(name, bname, bprice, updatetime, type); if (flag) { System.out.println("更新成功"); } else { System.out.println("更新失败"); } } public void deleteBook() { selectAll(); System.out.println("请输入您想要删除的图书的名字:"); String bname = sc.nextLine(); boolean flag = bController.deleteBook(bname); if (flag) System.out.println("删除成功"); System.out.println("删除失败"); } public void login() { System.out.println("----登录----"); System.out.println("请输入您的用户名:"); String username = sc.nextLine(); System.out.println("请输入您的密码:"); String password = sc.nextLine(); boolean flag = uController.login(username, password); if (flag) { System.out.println("登录成功!"); key = 1; } else { System.out.println("登录失败!"); } } public void reg() { //也可以使用递归,不用while循环 while (true) { System.out.println("----注册----"); System.out.println("请输入你要使用的用户名:"); String username = sc.nextLine(); System.out.println("请输入你要使用的密码:"); String password = sc.nextLine(); System.out.println("请再次输入密码:"); String psd = sc.nextLine(); boolean flag = uController.verify(username); if (flag) { if (password.equals(psd)) { uController.register(username, password); System.out.println("注册成功"); login(); break; } else { System.out.println("前后两次输入的密码不一致,请重新进行注册"); continue; } } else { System.out.println("该用户名已被占用,请重新进行注册"); } } } public void borrowBook() { if (key == 0) { System.out.println("您还没有登录,登录后才可以借书."); while (true) { printloginAndReg(); int choice = choice(); if(choice == 0) break; switch (choice) { case 1: reg(); borrowBook(); break; case 2: login(); borrowBook(); break; default: System.out.println("您的选择有误,请重新选择:"); break; } } } else { selectAll(); System.out.println("请输入你想要借的书的名字:"); String bname = sc.nextLine(); // state表示书本的状态,0表示未借出,1则表示已借出 boolean flag = bController.updateState(1, bname); if (flag) { System.out.println("借书成功!"); } else { System.out.println("借书失败!"); } } } public List<Book> onLoanBook(){ return bController.onLoanBook(); } public void returnBook() { List<Book> books = onLoanBook(); if(books.size() == 0){ System.out.println("您暂时没有借的书本."); }else{ System.out.println("您借的书本有:"); for (Book book : books) { System.out.println(book); } System.out.println("请输入你要还的书的名字:"); String bname = sc.nextLine(); boolean flag = bController.updateState(0, bname); if (flag) { System.out.println("还书成功!"); } else { System.out.println("还书失败!您输入的书名可能不正确!"); } } } public void exit() { if (key == 0) { System.out.println("您还没有登录呢!"); } else { key = 0; System.out.println("已退出登录!"); } } //选择操作 public int choice() { System.out.println("请选择您要进行的操作:"); try { int choice = sc.nextInt(); sc.nextLine(); return choice; } catch (InputMismatchException ie) { sc.nextLine(); return 10010; } } public void show() { while (true) { printMain(); int choice = choice(); switch (choice) { case 1: selectAll(); break; case 2: selectByType(); break; case 3: addBook(); break; case 4: updateBook(); break; case 5: deleteBook(); break; case 6: borrowBook(); break; case 7: returnBook(); break; case 8: exit(); break; case 0: System.out.println("bye"); System.exit(0); break; default: System.out.println("您的选择有误,请重新选择:"); break; } } } }