基于阿里巴巴的fastjson框架搭建的JavaEE版本的图书管理系统，项目架构如下：
fastjson包的阿里云下载镜像如下：
Central Repository: com/alibaba/fastjson2/fastjson2/2.0.8
运行效果：
Bean
Book.java
package Bean;public class Book {private String title;// 书名private String author;// 作者名private double price;// 价格private String type;// 书籍类型private boolean borrowed;// 借阅状态,默认为falsepublic Book(String title, String author, double price, String type) {this.title = title;this.author = author;this.price = price;this.type = type;this.borrowed = false;// 默认为false}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getAuthor() {return author;}public void setAuthor(String author) {this.author = author;}public double getPrice() {return price;}public void setPrice(double price) {this.price = price;}public String getType() {return type;}public void setType(String type) {this.type = type;}public boolean isBorrowed() {return borrowed;}public void setBorrowed(boolean borrowed) {this.borrowed = borrowed;}@Overridepublic String toString() {return "Book{" + "title='" + title + '\'' + ", author='" + author + '\'' + ", price=" + price + ", type='"+ type + '\'' + ", borrowed=" + borrowed + '}';}
}
Book.java
package Bean;public class User {private String username;// 用户名private String password;// 密码private String role;// 角色public String getUsername() {return username;}public User(String username, String password, String role) {this.username = username;this.password = password;this.role = role;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getRole() {return role;}public void setRole(String role) {this.role = role;}
}
Dao
BookDao
package Dao;import Bean.Book;
import java.util.List;public interface BookDao {// 读取json文件信息List<Book> getAllBooks();// 保存图书信息void saveBooks(List<Book> books);// 添加图书void addBook(Book book);// 删除图书void removeBook(String title);// 查找图书Book findBook(String title);// 更新图书借阅状态void updateBookStatus(String title, boolean borrowed);// 更新图书信息void updateBookDetails(String newTitle, String newAuthor, double newPrice, String newType);
}
UserDao
package Dao;import Bean.User;
import java.util.List;public interface UserDao {// 读取文件信息List<User> getAllUsers();// 添加用户void addUser(User user);// 查找用户User findUser(String username);
}
Dao.Impl
BookDaoImpl.java
package Dao.Impl;import Bean.Book;
import Dao.BookDao;
import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONObject;import java.io.*;
import java.util.ArrayList;
import java.util.List;public class BookDaoImpl implements BookDao {private static final String PATH = "books.txt";/*** @author Stringzhua* @exception 将books通过json解析为List集合中的数据*/@Overridepublic List<Book> getAllBooks() {StringBuilder jsonString = new StringBuilder();try (BufferedReader reader = new BufferedReader(new FileReader(PATH))) {String line;while ((line = reader.readLine()) != null) {jsonString.append(line);}} catch (IOException e) {e.printStackTrace();return new ArrayList<>();}// 从一个json数组字符串中解析出多个jsonObjects，并将存储在一个 List<JSONObject> 中List<JSONObject> jsonObjects = JSON.parseArray(jsonString.toString(), JSONObject.class);List<Book> books = new ArrayList<>();// 遍历list集合for (JSONObject jsonObject : jsonObjects) {Book book = new Book(jsonObject.getString("title"), jsonObject.getString("author"),jsonObject.getDoubleValue("price"), jsonObject.getString("type"));book.setBorrowed(jsonObject.getBooleanValue("borrowed"));books.add(book);}return books;}/*** @author Stringzhua* @exception 保存集合中的所有图书信息到json文件中*/@Overridepublic void saveBooks(List<Book> books) {List<JSONObject> jsonObjects = new ArrayList<>();for (Book book : books) {JSONObject jsonObject = new JSONObject();jsonObject.put("title", book.getTitle());jsonObject.put("author", book.getAuthor());jsonObject.put("price", book.getPrice());jsonObject.put("type", book.getType());jsonObject.put("borrowed", book.isBorrowed());jsonObjects.add(jsonObject);}try (Writer writer = new FileWriter(PATH)) {writer.write(JSON.toJSONString(jsonObjects));} catch (IOException e) {e.printStackTrace();}}// 添加图书方法@Overridepublic void addBook(Book book) {List<Book> books = getAllBooks();books.add(book);saveBooks(books);}// 删除图书@Overridepublic void removeBook(String title) {List<Book> books = getAllBooks();books.removeIf(book -> book.getTitle().equals(title));saveBooks(books);}// 查找图书@Overridepublic Book findBook(String title) {for (Book book : getAllBooks()) {if (book.getTitle().equals(title)) {return book;}}return null;
// return getAllBooks().stream().filter(book -> book.getTitle().equals(title)).findFirst().orElse(null);}// 借书@Overridepublic void updateBookStatus(String title, boolean borrowed) {List<Book> books = getAllBooks();for (Book book : books) {if (book.getTitle().equals(title)) {book.setBorrowed(borrowed);break;}}// 借书后保存信息到json文件中saveBooks(books);}// 更新图书@Overridepublic void updateBookDetails(String title, String newAuthor, double newPrice, String newType) {List<Book> books = getAllBooks();for (Book book : books) {if (book.getTitle().equals(title)) {book.setAuthor(newAuthor);book.setPrice(newPrice);book.setType(newType);break;}}// 更新后保存到json文件中saveBooks(books);}
}
UserDaoImpl.java
package Dao.Impl;import Bean.User;
import Dao.UserDao;import java.io.*;
import java.util.ArrayList;
import java.util.List;public class UserDaoImpl implements UserDao {private static final String PATH = "users.txt";/*** @author Stringzhua* @exception 将txt文件中的数据添加到users集合中*/@Overridepublic List<User> getAllUsers() {List<User> users = new ArrayList<>();try (BufferedReader reader = new BufferedReader(new FileReader(PATH))) {String line;while ((line = reader.readLine()) != null) {String[] userInfo = line.split(",");if (userInfo.length == 3) {users.add(new User(userInfo[0], userInfo[1], userInfo[2]));}}} catch (IOException e) {e.printStackTrace();}return users;}/*** @author Stringzhua* @exception 将新注册的用户信息写入到books.txt文件中*/@Overridepublic void addUser(User user) {try (BufferedWriter writer = new BufferedWriter(new FileWriter(PATH, true))) {writer.write(user.getUsername() + "," + user.getPassword() + "," + user.getRole());writer.newLine();} catch (IOException e) {e.printStackTrace();}}/*** @author Stringzhua* @exception 根据username去遍历集合中符合条件的user对象,返回该对象*/@Overridepublic User findUser(String username) {for (User user : getAllUsers()) {if (user.getUsername().equals(username)) {return user;}}// 没有找到return null;
// return getAllUsers().stream().filter(user -> user.getUsername().equals(username)).findFirst().orElse(null);}
}
Service
BookService.java
package Service;import Bean.Book;
import java.util.List;//TODO:同名的一本书借书的问题
public interface BookService {// 读取json文件信息List<Book> getAllBooks();// 添加图书void addBook(Book book);// 删除图书void removeBook(String title);// 查找图书Book findBook(String title);// 更新图书借阅状态void updateBookStatus(String title, boolean borrowed);// 更新图书信息void updateBookDetails(String title, String newAuthor, double newPrice, String newType);
}
UserService.java
package Service;import Bean.User;
import java.util.List;public interface UserService {// 读取文件信息List<User> getAllUsers();// 添加用户void addUser(User user);// 查找用户User findUser(String username);
}
Service.Impl
BookServiceImpl.java
package Service.Impl;import Bean.Book;
import Dao.BookDao;
import Service.BookService;
import java.util.List;public class BookServiceImpl implements BookService {private BookDao bookDao;// 有参构造方法public BookServiceImpl(BookDao bookDao) {this.bookDao = bookDao;}// 读取json文件信息@Overridepublic List<Book> getAllBooks() {return bookDao.getAllBooks();}// 添加图书@Overridepublic void addBook(Book book) {bookDao.addBook(book);}// 删除图书@Overridepublic void removeBook(String title) {bookDao.removeBook(title);}// 查找图书@Overridepublic Book findBook(String title) {return bookDao.findBook(title);}// 更新图书借阅状态@Overridepublic void updateBookStatus(String title, boolean borrowed) {bookDao.updateBookStatus(title, borrowed);}// 更新图书信息@Overridepublic void updateBookDetails(String newtitle, String newAuthor, double newPrice, String newType) {bookDao.updateBookDetails(newtitle, newAuthor, newPrice, newType);}
}
UserServiceImpl.java
package Service.Impl;import Bean.User;
import Dao.UserDao;
import Service.UserService;
import java.util.List;public class UserServiceImpl implements UserService {private UserDao userDao;// 有参构造方法public UserServiceImpl(UserDao userDao) {this.userDao = userDao;}// 读取文件信息@Overridepublic List<User> getAllUsers() {return userDao.getAllUsers();}// 添加用户@Overridepublic void addUser(User user) {userDao.addUser(user);}// 查找用户@Overridepublic User findUser(String username) {return userDao.findUser(username);}
}
Utils
package Utils;import java.text.SimpleDateFormat;
import java.util.Date;public class Message {// 展示用户名和当前时间public static void WelcomeMessage(String username) {SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String currentTime = formatter.format(new Date());System.out.println("欢迎 " + username + "! 当前时间: " + currentTime);}
}
View
View.Impl
AdminMenu.java
package View.Impl;import Bean.Book;
import Service.BookService;import java.util.Scanner;public class AdminMenu {public static void adminMenu(Scanner sc, BookService bookService) {while (true) {System.out.println("图书管理员系统菜单");System.out.println("1. 添加图书");System.out.println("2. 删除图书");System.out.println("3. 编辑图书");System.out.println("4. 查询图书");System.out.println("5. 退出图书管理员系统");System.out.print("请输入选择: ");int choice = sc.nextInt();sc.nextLine(); // 换行switch (choice) {case 1:addBook(sc, bookService);break;case 2:removeBook(sc, bookService);break;case 3:editBook(sc, bookService);break;case 4:searchBook(sc, bookService);break;case 5:return;default:System.out.println("无效的选择，请重新选择！");}}}private static void addBook(Scanner sc, BookService bookService) {System.out.println("============添加书籍============");System.out.print("请输入书名: ");String title = sc.nextLine();System.out.print("请输入作者: ");String author = sc.nextLine();System.out.print("请输入价格: ");double price = sc.nextDouble();sc.nextLine(); // 换行System.out.print("请输入类型: ");String type = sc.nextLine();Book book = new Book(title, author, price, type);bookService.addBook(book);System.out.println(book.getTitle() + "图书添加成功！");}private static void removeBook(Scanner sc, BookService bookService) {System.out.println("============删除书籍============");System.out.print("请输入要删除的书名: ");String title = sc.nextLine();bookService.removeBook(title);System.out.println("图书删除成功！");}private static void editBook(Scanner sc, BookService bookService) {System.out.println("============修改书籍============");System.out.print("请输入要编辑的书名: ");String title = sc.nextLine();Book book = bookService.findBook(title);if (book != null) {System.out.print("请输入新的作者:( 原书作者" + book.getAuthor() + ")");String newAuthor = sc.nextLine();System.out.print("请输入新的价格: (原书价格" + book.getPrice() + ")");double newPrice = sc.nextDouble();sc.nextLine(); // 换行System.out.print("请输入新的类型:(原书类型" + book.getType() + ")");String newType = sc.nextLine();bookService.updateBookDetails(title, newAuthor, newPrice, newType);System.out.println(title + "图书信息更新成功！");} else {System.out.println("书库中未找到这本《" + title + "》,请确认书名是否正确！");}}static void searchBook(Scanner sc, BookService bookService) {System.out.println("查询图书菜单");System.out.println("1. 查询全部图书");System.out.println("2. 按书名查询");System.out.println("3. 按作者查询");System.out.println("4. 按类型查询");System.out.print("请输入选择: ");int choice = sc.nextInt();sc.nextLine(); // 换行switch (choice) {case 1:System.out.println("===========查找所有书籍=============");for (Book book : bookService.getAllBooks()) {System.out.println(book);}break;case 2:System.out.println("===========根据书名查找书籍=============");System.out.print("请输入书名: ");String title = sc.nextLine();for (Book book : bookService.getAllBooks()) {//根据书名查找集合中的book对象if (book.getTitle().contains(title)) {System.out.println(book);}}break;case 3:System.out.println("===========根据作者名查找书籍=============");System.out.print("请输入作者: ");String author = sc.nextLine();for (Book book : bookService.getAllBooks()) {if (book.getAuthor().contains(author)) {//根据作者查找集合中的book对象System.out.println(book);}}break;case 4:System.out.println("===========根据书籍类型名查找书籍=============");System.out.print("请输入类型: ");String type = sc.nextLine();for (Book book : bookService.getAllBooks()) {if (book.getType().contains(type)) {//根据书籍类型查找集合中的book对象System.out.println(book);}}break;default:System.out.println("无效的选择，请重新选择！");}}
}
BorrowMenu.java
package View.Impl;import Bean.Book;
import Service.BookService;import java.util.Scanner;public class BorrowMenu {public static void userMenu(Scanner sc, BookService bookService) {while (true) {System.out.println("图书借阅系统菜单");System.out.println("1. 借阅图书");System.out.println("2. 归还图书");System.out.println("3. 查询图书");System.out.println("4. 退出图书借阅系统");System.out.print("请输入选择: ");int choice = sc.nextInt();sc.nextLine(); // 换行switch (choice) {case 1:borrowBook(sc, bookService);break;case 2:returnBook(sc, bookService);break;case 3:AdminMenu.searchBook(sc, bookService);break;case 4:return;default:System.out.println("无效的选择，请重新选择！");}}}private static void borrowBook(Scanner sc, BookService bookService) {System.out.println("============借阅书籍============");System.out.print("请输入要借阅的书名: ");String title = sc.nextLine();Book book = bookService.findBook(title);if (book != null && !book.isBorrowed()) {bookService.updateBookStatus(title, true);System.out.println(title + "图书借阅成功！");} else if (book != null && book.isBorrowed()) {System.out.println(title + "该图书已被借阅！");} else {System.out.println("书库中未找到这本《" + title + "》,请确认书名是否正确！");}}private static void returnBook(Scanner sc, BookService bookService) {System.out.println("============归还书籍============");System.out.print("请输入要归还的书名: ");String title = sc.nextLine();Book book = bookService.findBook(title);if (book != null && book.isBorrowed()) {bookService.updateBookStatus(title, false);System.out.println(title + "图书归还成功！");} else if (book != null && !book.isBorrowed()) {System.out.println(title + "该图书未被借阅！");} else {System.out.println("书库中未找到这本《" + title + "》,请确认书名是否正确！");}}
}
MainMenu.java
package View.Impl;public class MainMenu {public static void MainMenu() {System.out.println("欢迎使用图书管理系统！");System.out.println("1. 登录");System.out.println("2. 注册");System.out.println("3. 退出");System.out.print("请输入选择: ");}
}
启动类：Application.java
package View;import java.util.Scanner;import Bean.User;
import Dao.Impl.BookDaoImpl;
import Dao.Impl.UserDaoImpl;
import Service.BookService;
import Service.UserService;
import Service.Impl.BookServiceImpl;
import Service.Impl.UserServiceImpl;
import Utils.Message;
import View.Impl.AdminMenu;
import View.Impl.BorrowMenu;
import View.Impl.MainMenu;public class Application {private static BookService bookService = new BookServiceImpl(new BookDaoImpl());private static UserService userService = new UserServiceImpl(new UserDaoImpl());private static User user;public static void main(String[] args) {Scanner sc = new Scanner(System.in);while (true) {MainMenu.MainMenu();int choice = sc.nextInt();sc.nextLine(); // 换行switch (choice) {case 1:login(sc);break;case 2:register(sc);break;case 3:System.out.println("正在退出系统中........");try {Thread.sleep(1000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println();System.out.println("已退出系统，感谢您的使用！再见！");return;default:System.out.println("无效的选择，请重新选择！");}}}private static void login(Scanner sc) {System.out.println("============登录============");System.out.println("管理员用户请使用管理员账户登录");System.out.println("普通用户请使用个人账户登录");System.out.println("==========================");System.out.print("请输入用户名: ");String username = sc.nextLine();System.out.print("请输入密码: ");String password = sc.nextLine();User user = userService.findUser(username);if (user != null && user.getPassword().equals(password)) {user = user;Message.WelcomeMessage(username);// 判断是管理员还是普通用户if ("admin".equals(user.getRole())) {AdminMenu.adminMenu(sc, bookService);} else if ("user".equals(user.getRole())) {BorrowMenu.userMenu(sc, bookService);}} else {System.out.println("用户名或密码错误，请重试！");}}// 用户注册private static void register(Scanner scanner) {System.out.println("============注册============");System.out.print("请输入用户名: ");String username = scanner.nextLine();System.out.print("请输入密码: ");String password = scanner.nextLine();User user = new User(username, password, "user"); // 默认角色是普通用户userService.addUser(user);System.out.println(username + "注册成功，请登录！");}
}
Books.txt
[{"title":"三国演义","author":"罗贯中","price":89.9,"type":"小说","borrowed":false},{"title":"红楼梦","author":"曹雪芹","price":49.8,"type":"小说","borrowed":false},{"title":"java从入门到放弃","author":"黑马程序员","price":90.6,"type":"科学与技术","borrowed":true},{"title":"测试","author":"我","price":96.8,"type":"测试","borrowed":false},{"title":"4","author":"4","price":4.0,"type":"4","borrowed":false},{"title":"1","author":"1","price":1.0,"type":"1","borrowed":true},{"title":"1","author":"1","price":1.0,"type":"1","borrowed":false}]Users.txt
admin,admin,admin
user,user,user
1,1,user
2,2,user
3,3,user
4,4,user
1,1,user
