图书管理系统

package obj; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import tools.MyScanner; public class BookCity { private List<Book> books;//书城中所存在的书 // private List<User> users;//使用本书城的用户 private Map<String,User> userMap;//使用Map来保存本书城的用户 private User user;//登录本书城的用户 public BookCity() { super(); books = new ArrayList<>(); // users = new ArrayList<>(); userMap = new HashMap<>(); user = null; } public List<Book> getBooks() { return books; } public void setBooks(List<Book> books) { this.books = books; } // public List<User> getUsers() { // return users; // } // public void setUsers(List<User> users) { // this.users = users; // } public User getUser() { return user; } public void setUser(User user) { this.user = user; } public Map<String, User> getUserMap() { return userMap; } public void setUserMap(Map<String, User> userMap) { this.userMap = userMap; } //添加一本书到书城 private void addBook(Book book){ books.add(book); } //添加许多书到书城 private void addBooks(List<Book> books){ books.addAll(books); } //修改书籍 private void modifyBook(){ showBooks(); System.out.println("选择你要修改的书籍："); int choose = MyScanner.getInt(); choose = getLegalChoose(0, books.size()-1, choose); Book book = books.get(choose); System.out.println("你选择了书籍："+book.getName()); System.out.println("1.修改书名"); System.out.println("2.修改作者"); System.out.println("3.修改价格"); choose = MyScanner.getInt(); choose = getLegalChoose(1, 3, choose); switch (choose) { case 1: System.out.println("请输入新的书名："); String name = MyScanner.getStr(); book.setName(name); break; case 2: System.out.println("请输入新的作者："); String author = MyScanner.getStr(); book.setAuthor(author); break; case 3: System.out.println("请输入新的价格："); double price = MyScanner.getDouble(); book.setPrice(price); break; default: break; } } //删除书籍 private void removeBook(){ showBooks(); System.out.println("选择你要删除的书籍："); int choose = MyScanner.getInt(); books.remove(getLegalChoose(0, books.size()-1, choose)); } //添加一个用户到书城 public boolean addUser(User user){ // users.add(user); if(!userMap.containsKey(user.getName())){ userMap.put(user.getName(), user); return true; }else{ return false; } } //运行书城 public void run(){ int choose=0; do { choose = getChoose(); } while (!executeDefaultFunction(choose)); System.out.println("感谢使用本书城，再见"); } private int getChoose(){ System.out.println("1.登录"); System.out.println("2.注册"); System.out.println("3.退出"); System.out.println("请选择："); int choose = MyScanner.getInt(); return getLegalChoose(1, 3, choose); } private int getLegalChoose(int begin,int end,int choose){ while (choose>end||choose<begin){ System.out.println("超出范围"); System.out.println("请重新选择："); choose = MyScanner.getInt(); } return choose; } //执行用户未登录操作，返回ture时，程序终止执行。 private boolean executeDefaultFunction(int choose){ switch (choose) { case 1: if(!doLogin()){ System.out.println("登录失败,将回到主页面"); return false; }else{ System.out.println("欢迎登录本书城"); //操作 while(!userOperation()){ //用户不退出登录操作将一直循环。 } // return false; } case 2: doRegister(); return false; case 3: return true; default: break; } return false; } private void doRegister() { String name,password; System.out.println("输入用户名："); name = MyScanner.getStr(); System.out.println("输入密码："); password = MyScanner.getStr(); // addUser(new User(users.size(), name, password,Privileges.普通用户)); if(addUser(new User(userMap.size(), name, password,Privileges.普通用户))){ System.out.println("用户注册成功,将返回首页"); }else{ System.out.println("抱歉！该用户名已被注册"); } } private boolean doLogin() { String name,password; System.out.println("输入用户名："); name = MyScanner.getStr(); System.out.println("输入密码："); password = MyScanner.getStr(); // System.out.println("name:"+name+"password:"+password); // for (User user : users) { // if(user.getName().equals(name)&& // user.getPassword().equals(password)){ // this.user = user; // return true; // } // } if(userMap.containsKey(name)){ User user = userMap.get(name); if(password.equals(user.getPassword())){ this.user = user; return true; }else{ return false; } } return false; } //登录用户可执行的操作 private boolean userOperation(){ System.out.println("1.查看本书城所有书籍"); System.out.println("2.在本书城中查找书籍"); System.out.println("3.从本书城中订阅书籍"); System.out.println("4.查看我已订阅的书籍"); System.out.println("5.取消我已订阅的书籍"); System.out.println("6.从本书城中删除书籍"); System.out.println("7.从本书城中修改书籍"); System.out.println("8.从本书城中添加书籍"); System.out.println("9.退出登录"); System.out.println("请选择功能:"); int choose = MyScanner.getInt(); return excuteUserOperation(getLegalChoose(0, 9, choose)); } //查看商城中所有的书 public void showBooks(){ System.out.println(String.format("%-3s %-15s %-15s %-15s","编号","书名","作者名","订阅价格")); for (int i = 0; i < books.size(); i++) { System.out.print(String.format("%-3d", i)); books.get(i).show(); } System.out.println("---------------------------------"); } //用户订阅图书 private void orderBook(){ showBooks(); System.out.println("请选择你要订阅的书籍："); int choose = MyScanner.getInt(); user.addBook(books.get(getLegalChoose(0, books.size()-1, choose))); System.out.println("订阅成功"); } //用户查看已经订阅的图书 private void showOrderBook(){ if(user==null){ System.out.println("用户没有登录"); }else{ user.showBookMarket(); } } //用户取消订阅 private void cancelBook(){ showOrderBook(); System.out.println("请选择你要取消订阅的书籍："); int choose=0; choose = MyScanner.getInt(); int size = user.getUserBookMarket().getBooks().size(); user.getUserBookMarket().getBooks().remove(getLegalChoose(0, size-1, choose)); System.out.println("取消订阅成功"); } //查找书籍 private void findBook(){ System.out.println("请输入书名："); String name = MyScanner.getStr(); List<Book> booksTemp = new ArrayList<>(); for (Book book : books) { if(name.equals(book.getName())){ booksTemp.add(book); } } if(booksTemp.size()==0){ System.out.println("书城中没有该书，联系管理员进行添加吧"); }else{ System.out.println("查询结果如下"); System.out.println(String.format("%-3s %-15s %-15s %-15s","编号","书名","作者名","订阅价格")); for (int i = 0; i < booksTemp.size(); i++) { System.out.print(String.format("%-3d", i)); booksTemp.get(i).show(); } orderBook(); } } //执行用户登录后的操作,返回true时终止执行 private boolean excuteUserOperation(int choose){ if(choose==1){ showBooks(); return false; } if(choose==2){ findBook(); return false; } if(choose==3){ orderBook(); return false; } if(choose==4){ showOrderBook(); return false; } if(choose==5){ cancelBook(); return false; } if(choose==6){ if(user.getPrivileges()==Privileges.超级用户){ removeBook(); }else{ System.out.println("你的权限不够"); } return false; } if(choose==7){ if(user.getPrivileges()==Privileges.超级用户){ modifyBook(); }else{ System.out.println("你的权限不够"); } return false; }