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Java實現圖書館借閱系統(tǒng)

 更新時間：2022年03月11日 08:35:31   作者：twelve1959  
這篇文章主要為大家詳細介紹了Java實現圖書館借閱系統(tǒng)，文中示例代碼介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們可以參考一下

本文實例為大家分享了Java實現圖書館借閱系統(tǒng)的具體代碼，供大家參考，具體內容如下

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(tǒng)");

?? ??? ?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(tǒng)");

?? ??? ?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("西游記","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(tǒng)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(tǒng)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(tǒng)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);
}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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