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book - Book

package book;public class Book {private String name; //书的名字private String author;//书的作者private double price;//书的价格private String type;//书的类型private boolean isBorrowed;//书是否被借出public Book(String name, String author, double 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 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 isBorrowed;}public void setBorrowed(boolean borrowed) {isBorrowed = borrowed;}@Overridepublic String toString() {return "Book{" +"name='" + name + '\'' +", author='" + author + '\'' +", price=" + price +", type='" + type + '\'' +", isBorrowed=" + (isBorrowed == true ?  "已借出" : "未借出") +'}';}
}

book - BookList

package book;public class BookList {private Book[] books;private int usedSize; //表示当前暑假有几本书public BookList(){this.books = new Book[10];books[0] = new Book("三国演义","罗贯中",6,"小说");books[1] = new Book("西游记","吴承恩",8,"小说");books[2] = new Book("红楼梦","曹雪芹",10,"小说");this.usedSize = 3;}public Book getBook(int pos){return this.books[pos];}public  void setBook(Book book,int pos){books[pos] = book;}public int getUsedSize() {return usedSize;}public void setUsedSize(int usedSize) {this.usedSize = usedSize;}}

opera - IOPeration

package opera;import book.BookList;
public interface IOPeration {void work(BookList bookList);
}

opera - AddOperation

package opera;import book.BookList;
import book.Book;import java.util.Scanner;public class AddOperation implements IOPeration {@Overridepublic void work(BookList bookList) {System.out.println("新增图书");Scanner scanner = new Scanner(System.in);System.out.print("请输入新增图书的名字：");String name = scanner.nextLine();System.out.print("请输入新增图书的作者：");String author = scanner.nextLine();System.out.println("请输入新增图书价格：");int price = scanner.nextInt();System.out.println("请输入新增图书的类型");scanner.nextLine();String type = scanner.nextLine();Book book = new Book(name,author,price,type);int currentSize = bookList.getUsedSize();for (int i = 0; i < currentSize; i++) {Book tmp = bookList.getBook(i);if(tmp.getName().equals(name)){System.out.println("已经有这本书");}}bookList.setBook(book,currentSize);bookList.setUsedSize(currentSize+1);}
}

opera - BorrowOperation

package opera;import book.Book;
import book.BookList;import java.util.Scanner;public class BorrowOperation implements IOPeration{@Overridepublic void work(BookList bookList) {System.out.println("借阅图书");System.out.println("请输入你想要借阅的图书名字：");Scanner scanner = new Scanner(System.in);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");break;}System.out.println("没有你想要借阅的图书"+ name);}}
}

opera - DelOperation

package opera;import book.Book;
import book.BookList;import java.util.Scanner;public class DelOperation implements IOPeration{@Overridepublic void work(BookList bookList) {System.out.println("删除图书");System.out.println("请输入想要删除的图书的名字：");Scanner scanner = new Scanner(System.in);String name = scanner.nextLine();int currentSize = bookList.getUsedSize();int flag = 0;for (int i = 0; i < currentSize; i++) {Book tmp = bookList.getBook(i);if(tmp.getName().equals(name)){flag = i;break;}}for (int j = 0; j < currentSize - 1; j++) {Book book = bookList.getBook(j+1);bookList.setBook(book,j);}bookList.setUsedSize(currentSize - 1);bookList.setBook(null,currentSize - 1);}
}

opera - ExitOperation

package opera;import book.BookList;public class ExitOperation implements IOPeration{@Overridepublic void work(BookList bookList) {System.out.println("退出系统");System.exit(0); //用于终结程序}
}

opera - FindOperation

package opera;import book.BookList;
import book.Book;import java.util.Scanner;public class FindOperation implements IOPeration {@Overridepublic void work(BookList bookList) {System.out.println("查找图书");System.out.print("请输入想要查找的图书的名字：");Scanner scanner = new Scanner(System.in);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)){System.out.println("查到了");System.out.println(book);}else {System.out.println("没有这本书");}}}
}

opera - ReturnOpertion

package opera;import book.Book;
import book.BookList;import java.util.Scanner;public class ReturnOpertion implements IOPeration{@Overridepublic void work(BookList bookList) {System.out.println("归还图书");System.out.println("请输入你想要归还的图书名字：");Scanner scanner = new Scanner(System.in);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");}System.out.println("没有你想要归还的图书"+ name);}}
}

opera - ShowOperation

package opera;import book.BookList;public class ShowOperation implements IOPeration{@Overridepublic void work(BookList bookList) {System.out.println("显示图书");int currentSize = bookList.getUsedSize();for (int i = 0; i < currentSize; i++) {System.out.println(bookList.getBook(i));}}
}

user - AdminUser

package user;import opera.*;import java.util.Scanner;
public class AdminUser extends User{public AdminUser(String name) {super(name);this.ioPeration =new IOPeration[]{new ExitOperation(),new FindOperation(),new AddOperation(),new DelOperation(),new ShowOperation()};}@Overridepublic int menu(){System.out.println("____________________________________");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");Scanner scanner = new Scanner(System.in);int choice= scanner.nextInt();return choice;}
}

user - NormalUser

package user;
import book.BookList;
import opera.*;import java.util.Scanner;public class NormalUser extends User{public NormalUser(String name) {super(name);this.ioPeration = new IOPeration[]{new FindOperation(),new BorrowOperation(),new ReturnOpertion(),new ExitOperation()};}@Overridepublic int menu(){System.out.println("_________________");System.out.println("hello,"+name+"~");System.out.println("0.查找图书！");System.out.println("1.借阅图书！");System.out.println("2.归还图书！");System.out.println("3.退出系统！");Scanner scanner = new Scanner(System.in);int choice= scanner.nextInt();return choice;}
}

user - User

package user;import book.BookList;
import opera.IOPeration;public abstract class User {protected String name;protected IOPeration[] ioPeration;public User(String name) {this.name = name;}public abstract int menu();public void doWork(int choice, BookList bookList){this.ioPeration[choice].work(bookList);}}

Main

import book.BookList;

import user.NormalUser;
import user.AdminUser;
import user.User;

import java.util.Scanner;

public class Main {
public static User login(){
System.out.print(“请输入姓名：”);
Scanner scanner = new Scanner(System.in);
String name = scanner.nextLine();
System.out.println(“请选择你的身份：1->管理员，2->用户”);
int choice = scanner.nextInt();
if(choice == 1 ){
return new AdminUser(name);
} else {
return new NormalUser(name);
}
}
public static void main(String[] args) {
User user = login();
BookList bookList = new BookList();
while (true){
int choice = user.menu();
user.doWork(choice,bookList);
}
}
}