图书管理系统 包括图书查询，借书，还书等

/*!Begin Snippet:file*/ import java.io.*; import java.util.*; /** * This class implements a library system. * * @author iCarnegie * @version 1.1.0 * @see CatalogItem * @see Book * @see Recording * @see Catalog * @see Borrower * @see BorrowedItems * @see BorrowerDatabase */ public class LibrarySystem { private static BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in)); private static PrintWriter stdOut = new PrintWriter(System.out, true); private static PrintWriter stdErr = new PrintWriter(System.err, true); private Catalog catalog; private BorrowerDatabase borrowerDB; /** * Loads the information of the library catalog and * borrowers database and starts the application. * * @param args String arguments. Not used. * @throws IOException if there are errors in the input. */ public static void main(String[] args) throws IOException { Catalog catalog = load(); LibrarySystem app = new LibrarySystem(catalog, load(catalog)); app.run(); } /* * Loads the information of a Catalog object. */ private static Catalog load () { Catalog catalog = new Catalog(); catalog.addItem(new Book("B001", "Effective Java Programming", 2001, "Joshua Bloch", 252)); catalog.addItem(new Book("B002", "Design Patterns", 1995, "Erich Gamma et al", 395)); catalog.addItem(new Book("B003", "Refactoring", 1999, "Martin Fowler", 431)); catalog.addItem(new Book("B004", "The Mythical Man-Month", 1995, "Frederick P. Brooks", 322)); catalog.addItem(new Book("B005", "Code Complete", 1993, "Steve C McConnell", 857)); catalog.addItem(new Book("B006", "The Psychology of Comp. Progr.", 1998, "Gerald M. Weinberg", 360)); catalog.addItem(new Book("B007", "Programming Pearls ", 1999, "Jon Bentley", 239)); catalog.addItem(new Book("B008", "The Practice of Programming", 1999, "Brian W. Kernighan", 257)); catalog.addItem(new Book("B009", "Peopleware", 1999, "Tom Demarco", 245)); catalog.addItem(new Book("B010", "The Java Programming Language", 2000, "Ken Arnold", 595)); catalog.addItem(new Book("B011", "Core J2EE Patterns", 2001, "Deepak Alur", 496)); catalog.addItem(new Book("B012", "Rapid Development", 1996, "Steve C McConnell", 680)); catalog.addItem(new Book("B013", "Applying UML and Patterns", 2001, "Craig Larman", 656)); catalog.addItem(new Book("B014", "The Little Schemer", 1995, "Daniel P. Friedman", 216)); catalog.addItem(new Book("B015", "Agile Software Development", 2001, "Alistair Cockburn", 256)); catalog.addItem(new Recording("R001", "Getz/Gilberto", 1963, "Stan Getz and Joao Gilberto", "CD")); catalog.addItem(new Recording("R002", "Kind of Blue", 1997, "Miles Davis", "CD")); catalog.addItem(new Recording("R003", "Supernatural", 1999, "Santana", "Tape")); catalog.addItem(new Recording("R004", "Private Collection", 1983, "Jon & Vangelis", "Tape")); catalog.addItem(new Recording("R005", "Abbey Road", 1969, "Beatles", "CD")); catalog.addItem(new Recording("R006", "Joshua Tree", 1990, "U2", "CD")); return catalog; } /* * Loads a BorrowerDatabase object. */ private static BorrowerDatabase load(Catalog catalog) { BorrowerDatabase borrowerDB = new BorrowerDatabase(); Borrower borrower = new Borrower("ID001", "James Addy"); borrower.getBorrowedItems().addItem(catalog.getItem("B003")); borrower.getBorrowedItems().addItem(catalog.getItem("R001")); borrower.getBorrowedItems().addItem(catalog.getItem("B012")); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID002", "John Doust"); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID003", "Constance Foster"); borrower.getBorrowedItems().addItem(catalog.getItem("B006")); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID004", "Harold Gurske"); borrower.getBorrowedItems().addItem(catalog.getItem("B002")); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID005", "Mary A. Rogers"); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID006", "Laura Novelle"); borrower.getBorrowedItems().addItem(catalog.getItem("B007")); borrower.getBorrowedItems().addItem(catalog.getItem("B009")); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID007", "David M. Prescott"); borrower.getBorrowedItems().addItem(catalog.getItem("B011")); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID008", "Francis Matthews"); borrower.getBorrowedItems().addItem(catalog.getItem("R003")); borrower.getBorrowedItems().addItem(catalog.getItem("B005")); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID009", "Thomas Ferris"); borrowerDB.addBorrower(borrower); borrower = new Borrower("ID010", "John Johnson"); borrower.getBorrowedItems().addItem(catalog.getItem("B004")); borrowerDB.addBorrower(borrower); return borrowerDB; } /* * Constructs a <code>LibrarySystem</code> object. * Initialize the catalog and the borrower database with * the values specified in the parameters. */ private LibrarySystem(Catalog initialCatalog, BorrowerDatabase initialBorrowerDB) { this.catalog = initialCatalog; this.borrowerDB = initialBorrowerDB; } /* * Presents the user with a menu of options and processes the selection. */ private void run() throws IOException { int choice = getChoice(); while (choice != 0) { if (choice == 1) { displayCatalog(); } else if (choice == 2) { displayCatalogItem(); } else if (choice == 3) { displayBorrowerDatabase(); } else if (choice == 4) { displayBorrower(); } else if (choice == 5) { checkOut(); } else if (choice == 6) { checkIn(); } choice = getChoice(); } } /* Validates the user's choice. */ private int getChoice() throws IOException { int input; do { try { stdErr.println(); stdErr.print("[0] Quit\n" + "[1] Display catalog\n" + "[2] Display catalog item\n" + "[3] Display borrowers\n" + "[4] Display borrowed items\n" + "[5] Check out\n" + "[6] Check in\n" + "choice> "); stdErr.flush(); input = Integer.parseInt(stdIn.readLine()); stdErr.println(); if (0 <= input && 6 >= input) { break; } else { stdErr.println("Invalid choice: " + input); } } catch (NumberFormatException nfe) { stdErr.println(nfe); } } while (true); return input; } /* * Displays the catalog. */ private void displayCatalog() { if (this.catalog.getNumberOfItems() == 0) { stdErr.println("The catalog is empty"); } else { for (CatalogItem item : this.catalog) { stdOut.println(item.getCode() + " " + item.getTitle() + " " + (item.isAvailable()? "(A)" : "(NA)")); } } } /* * Displays a catalog item. */ private void displayCatalogItem() throws IOException { CatalogItem item = readCatalogItem(); if (item != null) { stdOut.println(" Title: " + item.getTitle()); stdOut.println(" Year: " + item.getYear());