Java----圖書館借閱系統

Main.java

package com.src1.booksystem;

import com.src1.booksystem.booklist.BookList;
import com.src1.booksystem.users.AdminUser;
import com.src1.booksystem.users.NormalUser;
import com.src1.booksystem.users.User;


import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		//1.準備書籍
		BookList bookList = new BookList();
		//2登錄
		User user = login();
		while ( true ) {
			int chioce = user.menu();
			//3.根據選擇調用方法
			user.doOperation(chioce, bookList);
		}
	}
	public static User login() {
		Scanner scanner = new Scanner(System.in);
		System.out.println("請輸入用戶名:");
		String name = scanner.nextLine();
		if ( "admin".equals(name) ) {
			System.out.println("請輸入管理員密碼:");
			String password = scanner.nextLine();
			if ( "admin".equals(password) ) {
				System.out.println("hello! 尊敬的管理員! 歡迎來到藏經閣");
				return new AdminUser(name);
			} else {
				System.out.println("密碼錯誤,進入用戶端!");
				System.out.println("hello! "+ name+" 歡迎來到藏經閣");
				return new NormalUser(name);
			}
		}else {
			System.out.println("hello! "+ name+" 歡迎來到藏經閣");
			return new NormalUser(name);
		}
	}
}

package user

AdminUser.java

package com.src1.booksystem.users;

import com.src1.booksystem.operation.*;

import java.util.Scanner;


public class AdminUser extends User {
	@Override
	public int menu() {
		Scanner scanner = new Scanner(System.in);


		System.out.println("1.查找圖書");
		System.out.println("2.新增書籍");
		System.out.println("3.刪除書籍");
		System.out.println("4.書籍列表");
		System.out.println("0.退出系統");

		int chioce = scanner.nextInt();
		return chioce;
	}

	public AdminUser(String name) {
		super(name);
		this.operations = new IOperation[] {
				new ExitOperation(),
				new FindOperation(),
				new AddOperation(),
				new DelOperation(),
				new DisplayOperation()
		};
	}
}

NormalUser.java

package com.src1.booksystem.users;

import com.src1.booksystem.operation.*;

import java.util.Scanner;

public class NormalUser extends User {
	@Override
	public int menu() {
		Scanner scanner = new Scanner(System.in);


		System.out.println("1.查找圖書");
		System.out.println("2.借閱書籍");
		System.out.println("3.歸還書籍");
		System.out.println("4.書籍列表");
		System.out.println("0.退出系統");

		int chioce = scanner.nextInt();
		return chioce;

	}

	public NormalUser(String name) {
		super(name);
		this.operations = new IOperation[] {
				new ExitOperation(),
				new FindOperation(),
				new BorrowOperation(),
				new ReturnOperation(),
				new DisplayOperation()
		};
	}
}

User.java

package com.src1.booksystem.users;

import com.src1.booksystem.booklist.BookList;
import com.src1.booksystem.operation.IOperation;

abstract public class User {
	public String name;
	public IOperation[] operations;
	/**
	 * 如果沒有menu 就不能通過user訪問
	 */
	public abstract int menu() ;
	public void doOperation(int chioce, BookList bookList){
		//數組當中元素的對象,通過.調用對應operation方法
		operations[chioce].work(bookList);
	}
	public User(String name) {
		this.name = name;
	}

}

package book

book.java

package com.src1.booksystem.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) {
		this.name = name;
		this.author = author;
		this.price = price;
	}




	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 boolean isBorrowed() {
		return isBorrowed;
	}

	public void setBorrowed(boolean borrowed) {
		isBorrowed = borrowed;
	}

	@Override
	public String toString() {
		return "[" +
				"書名:" + name +
				", 作者:" + author +
				", 價格:" + price + ","+
				(isBorrowed ? "已借出":"未借出")+"]";

	}
}

package booklist

BookList.java

package com.src1.booksystem.booklist;
import com.src1.booksystem.book.Book;
public class BookList {
	private   Book[] books;
	private int usedSize;

	public BookList() {
		this.books = new Book[10];
		this.books[0] = new Book("西遊記","吳承恩",13);
		this.books[1] = new Book("水滸傳","施耐庵",14);
		this.books[2] = new Book("三國演義","羅貫中",15);
		this.usedSize = 3;
	}

	public int getUsedSize() {
		return usedSize;
	}

	public  void setUsedSize(int usedSize) {
		this.usedSize = usedSize;
	}
	public Book getBook(int pos) {
		return books[pos];
	}

	public void setBooks(int pos,Book book) {
		this.books[pos] = book;
	}

}

package operation

AddOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.book.Book;
import com.src1.booksystem.booklist.BookList;

import java.util.Scanner;

public class AddOperation implements  IOperation{
	@Override
	public void work(BookList bookList) {
		Scanner scanner = new Scanner(System.in);
		System.out.println("請輸入書名");
		String name = scanner.nextLine();
		System.out.println("請輸入作者");
		String author = scanner.nextLine();

		System.out.println("請輸入價格");
		int price = scanner.nextInt();



			Book book = new Book(name, author, price);
			int curSize = bookList.getUsedSize();
			bookList.setBooks(curSize, book);
			bookList.setUsedSize(curSize + 1);
			System.out.println("新增成功");


	}
}

BorrowOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.book.Book;
import com.src1.booksystem.booklist.BookList;

import java.util.Scanner;


public class BorrowOperation implements IOperation {
	@Override
	public void work(BookList bookList) {
		System.out.println("借閱書籍");
		Scanner scanner = new Scanner(System.in);
		System.out.println("請輸入你要借閱的圖書：");
		String name = scanner.nextLine();

		for (int i = 0; i < bookList.getUsedSize(); i++) {
			Book book = bookList.getBook(i);
			if(book.getName().equals(name)) {
				if(book.isBorrowed()) {
					System.out.println("此書已經借出了！");
					return;
				}
				book.setBorrowed(true);
				System.out.println("借閱成功！");
				return;
			}
		}
		System.out.println("沒系統未收錄這本書！");
	}
}

DelOperation

未完善

package com.src1.booksystem.operation;

import com.src1.booksystem.booklist.BookList;

import java.util.Scanner;
import com.src1.booksystem.book.Book;

public class DelOperation implements IOperation{
	@Override
	public void work(BookList bookList) {
		System.out.println("請輸入要刪除的書名:");
		Scanner scanner = new Scanner(System.in);
		String delbook = scanner.nextLine();
		int size = bookList.getUsedSize();

		for (int i = 0; i < size; i++) {
			Book book = bookList.getBook(i);
			if(book.getName().equals(delbook)) {
				if(i+1<size) {
					bookList.setBooks(i, bookList.getBook(i + 1));
				}
				bookList.setUsedSize(size-1);
				if(i+2 < size) {
					bookList.setBooks(i+1, bookList.getBook(i + 2));
				}
			}
		}
		System.out.println("刪除成功!");
	}
}

修改

public class DelOperation implements IOperation{
	@Override
	public void work(BookList bookList) {
		System.out.println("請輸入要刪除的書名:");
		Scanner scanner = new Scanner(System.in);
		String delbook = scanner.nextLine();
		int size = bookList.getUsedSize();
		int pos = 0;
		int i = 0;
		for ( i = 0; i < size; i++) {
			Book book = bookList.getBook(i);
			if(book.getName().equals(delbook)) {
				pos = i;
				break;
			}
		}
		if(i == size){
			System.out.println("系統中沒有這本書");
			return;
		}
		for(int j = pos; j < size-1; j++) {
			bookList.setBooks(j, bookList.getBook(j + 1));
		}
		bookList.setUsedSize(size-1);
		System.out.println("刪除成功!");
	}
}

DisplayOperation

import com.src1.booksystem.booklist.BookList;

public class DisplayOperation implements IOperation{
	@Override
	public void work(BookList bookList) {
		for (int i = 0; i < bookList.getUsedSize(); i++) {
			System.out.println(bookList.getBook(i));
		}
	}
}

ExitOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.booklist.BookList;


public class ExitOperation implements IOperation {
	@Override
	public void work(BookList bookList) {
		System.exit(0);
	}
}

FindOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.book.Book;
import com.src1.booksystem.booklist.BookList;

import java.util.Scanner;


public class FindOperation implements IOperation{
	@Override
	public void work(BookList bookList) {
		Scanner scanner = new Scanner(System.in);
		System.out.println("請輸入要查找的書名");
		String name = scanner.nextLine();
		for( int i = 0; i < bookList.getUsedSize(); i++) {
			Book book = bookList.getBook(i);
			if(book.getName().equals(name)) {
				System.out.println(book);

				return;
			}

		}
	}
}

ReturnOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.book.Book;
import com.src1.booksystem.booklist.BookList;

import java.util.Scanner;

public class ReturnOperation implements IOperation {
	@Override
	public void work(BookList bookList) {
		Scanner scanner = new Scanner(System.in);
		System.out.println("請輸入你要歸還的書名：");
		String name = scanner.nextLine();

		for (int i = 0; i < bookList.getUsedSize(); i++) {
			Book book = bookList.getBook(i);
			if(book.getName().equals(name)) {
				//說明有這本書
				book.setBorrowed(false);
				System.out.println("歸還成功！");
				return;
			}
		}
		System.out.println("系統未找到本書的相關信息！");
	}
}

接口 IOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.booklist.BookList;


public interface IOperation {
	 void work(BookList bookList);
}