1.书类

package book;public class Book {private String name;private String author;private int price;private String type;private boolean isBorrowed;public Book(String name, String author, int price, String type) {this.name = name;this.author = author;this.price = price;this.type = type;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAuthor() {return author;}public void setAuthor(String author) {this.author = author;}public int getPrice() {return price;}public void setPrice(int price) {this.price = price;}public String getType() {return type;}public void setType(String type) {this.type = type;}public boolean isBorrowed() {return isBorrowed;}public void setBorrowed(boolean borrowed) {isBorrowed = borrowed;}@Overridepublic String toString() {return "book{" +"name='" + name + '\'' +", author='" + author + '\'' +", price=" + price +", type='" + type + '\'' +(isBorrowed == true ? " 已借出 ":" 未借出 ")+'}';}
}

2.图书列表

package book;public class BookList {public Book[] bookList = new Book[10];private int usedSize;//当前书架上书的数目public BookList() {bookList[0] = new Book("三国演义","罗贯中",18,"小说");bookList[1] = new Book("水浒传","施耐庵",48,"小说");bookList[2] = new Book("西游记","吴承恩",28,"小说");this.usedSize = 3;}public int getUsedSize() {return usedSize;}public void setUsedSize(int usedSize) {this.usedSize = usedSize;}//把书放到pos位置public void setBookList(int pos,Book book) {bookList[pos] = book;}//获取pos位置的书public Book getBook(int pos) {return bookList[pos];}//这里本质上是可以写借阅书籍等操作的
}

3.新增图书

package operation;import book.Book;
import book.BookList;import java.util.Scanner;public class AddOperation implements IOperation {public void work(BookList bookList) {System.out.println("新增图书！");Scanner scanner = new Scanner(System.in);System.out.println("输入你要新增书籍的名字：");String name = scanner.nextLine();System.out.println("输入你要新增书籍的作者：");String author = scanner.nextLine();System.out.println("输入你要新增书籍的类型：");String type = scanner.nextLine();System.out.println("输入你要查找新增书籍的价格：");int price = scanner.nextInt();Book book = new Book(name,author,price,type);int currentSize = bookList.getUsedSize();bookList.setBookList(currentSize,book);bookList.setUsedSize(currentSize + 1);//放入一本书System.out.println("新增成功");}
}

4.借阅图书

package operation;import book.Book;
import book.BookList;import java.util.Scanner;public class BorrowOperation implements IOperation {public void work(BookList bookList) {System.out.println("借阅图书！");Scanner scanner = new Scanner(System.in);System.out.println("输入你要借阅的书籍：");String name = scanner.nextLine();int currentSize = bookList.getUsedSize();for (int i = 0; i < currentSize; i++) {Book book = bookList.getBook(i);if (book.getName().equals(name)) {book.setBorrowed(true);System.out.println("借阅成功，借阅书籍信息如下：");System.out.println(book);return;}}System.out.println("借阅失败，没有这本书籍！");}
}

5.删除图书

package operation;import book.Book;
import book.BookList;import java.util.Scanner;public class DelOperation implements IOperation {public void work(BookList bookList) {System.out.println("删除图书！");Scanner scanner = new Scanner(System.in);System.out.println("输入你要删除书籍：");String name = scanner.nextLine();int currentSize = bookList.getUsedSize();int index = -1;for (int i = 0; i < currentSize; i++) {Book book = bookList.getBook(i);if (book.getName().equals(name)) {index = i;break;}}//如果index==-1，说明没有这本书if (index == -1) {System.out.println("没有你要删除的图书");return;}//从这里开始删除for (int i = 0; i < currentSize-1; i++) {Book book = bookList.getBook(i + 1);bookList.setBookList(i,book);}bookList.setUsedSize(currentSize - 1);}
}

6.显示图书

package operation;import book.Book;
import book.BookList;public class DisplayOperation implements IOperation {public void work(BookList bookList) {System.out.println("显示图书！");int currentSize = bookList.getUsedSize();for (int i = 0; i < currentSize; i++) {Book book = bookList.getBook(i);System.out.println(book);}}
}

7.退出系统

package operation;import book.BookList;public class ExitOperation implements IOperation{public void work(BookList bookList){//可以对书架进行手动清空System.out.println("退出系统！");System.exit(0);}
}

8.查找图书

package operation;import book.Book;
import book.BookList;import java.util.Scanner;public class FindOperation implements IOperation {public void work(BookList bookList) {System.out.println("查找图书！");Scanner scanner = new Scanner(System.in);System.out.println("输入你要查找的书籍：");String name = scanner.nextLine();int size = bookList.getUsedSize();for (int i = 0; i < size; i++) {Book book = bookList.getBook(i);if (book.getName().equals(name)) {System.out.println("找到了这本书");System.out.println(book);return;}}System.out.println("没有这本书");}
}

9.接口

package operation;import book.BookList;public interface IOperation {void work(BookList bookList);
}

10.归还图书

package operation;import book.Book;
import book.BookList;import java.util.Scanner;public class ReturnOperation implements IOperation {public void work(BookList bookList) {System.out.println("归还图书！");Scanner scanner = new Scanner(System.in);System.out.println("输入你要归还的书籍：");String name = scanner.nextLine();int currentSize = bookList.getUsedSize();for (int i = 0; i < currentSize; i++) {Book book = bookList.getBook(i);if (book.getName().equals(name)) {book.setBorrowed(false);System.out.println("归还成功，归还书籍信息如下：");System.out.println(book);return;}}System.out.println("归还失败，没有这本书籍！");}
}

11.管理员菜单

package user;import operation.*;import java.util.Scanner;public class AdiminUser extends User {public AdiminUser(String name) {super(name);this.iOperations = new IOperation[] {new ExitOperation(),new FindOperation(),new AddOperation(),new DelOperation(),new DisplayOperation()};}public int menu() {System.out.println("==============管理员菜单===========");System.out.println("hello "+this.name+" 欢迎来到图书小练习 ");System.out.println("1.查找图书");System.out.println("2.新增图书");System.out.println("3.删除图书");System.out.println("4.显示图书");System.out.println("0.退出系统");System.out.println("=================================");Scanner scanner = new Scanner(System.in);int choice = scanner.nextInt();return choice;}
}

12.普通用户菜单

package user;import operation.*;import java.util.Scanner;public class NormaUser extends User {public NormaUser(String name) {super(name);this.iOperations = new IOperation[] {new ExitOperation(),new FindOperation(),new BorrowOperation(),new ReturnOperation()};}public int menu() {System.out.println("==============普通用户菜单===========");System.out.println("hello "+this.name+" 欢迎来到图书小练习 ");System.out.println("1.查找图书");System.out.println("2.借阅图书");System.out.println("3.归还图书");System.out.println("0.退出系统");System.out.println("请输入你的操作：");Scanner scanner = new Scanner(System.in);int choice = scanner.nextInt();return choice;}
}

13.用户类

package user;import book.BookList;
import operation.IOperation;public abstract class User {protected String name;protected IOperation[] iOperations;public User(String name) {this.name = name;}public abstract int menu();public void doOperation(int choice, BookList bookList) {this.iOperations[choice].work(bookList);}
}

14.主函数

import book.BookList;
import user.AdiminUser;
import user.NormaUser;
import user.User;import java.util.Scanner;public class Main {public static User login() {System.out.println("请输入你的姓名：");Scanner scanner = new Scanner(System.in);String name  = scanner.nextLine();System.out.println("请输入你的身份：1：管理员 0：普通用户");int choice = scanner.nextInt();if (choice == 1) {return new AdiminUser(name);}else{return new NormaUser(name);}}public static void main(String[] args) {BookList bookList = new BookList();User user = login();//User user = AdiminUser(name);//User user = NormaUser(name);while (true){int choice = user.menu();user.doOperation(choice,bookList);}}
}