Java实现图书馆借阅系统

Java实现图书馆借阅系统

本文实例为大家分享了java实现图书馆借阅系统的具体代码，供大家参考，具体内容如下

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.准备书籍

BookList bookList = new BookList();

//2登录

User user = login();

while ( true ) {

int chioce = user.menu();

//3.根据选择调用方法

user.doOperation(chioce, bookList);

}

}

public static User login() {

Scanner scanner = new Scanner(System.in);

System.out.println("请输入用户名:");

String name = scanner.nextLine();

if ( "admin".equals(name) ) {

System.out.println("请输入管理员密码:");

String password = scanner.nextLine();

if ( "admin".equals(password) ) {

System.out.println("hello! 尊敬的管理员! 欢迎来到藏经阁");

return new AdminUser(name);

} else {

System.out.println("密码错误,进入用户端!");

System.out.println("hello! "+ name+" 欢迎来到藏经阁");

return new NormalUser(name);

}

}else {

System.out.println("hello! "+ name+" 欢迎来到藏经阁");

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 Shttp://canner(System.in);

System.out.println("1.查找图书");

System.out.println("2.新增书籍");

System.out.println("3.删除书籍");

System.out.println("4.书籍列表");

System.out.println("0.退出系统");

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.查找图书");

System.out.println("2.借阅书籍");

System.out.println("3.归还书籍");

System.out.println("4.书籍列表");

System.out.println("0.退出系统");

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;

/**

* 如果没有menu 就不能通过user访问

*/

public abstract int menu() ;

public void doOperation(int chioce, BookList bookList){

//数组当中元素的对象,通过.调用对应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;

}

puFIEjyshblic 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 "[" +

"书名:" + name +

", 价格:" + 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("西游记","吴承恩",13);

this.books[1] = new Book("水浒传","施耐庵",14);

this.books[2] = new Book("三国演义","罗贯中",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("请输入书名");

String name = scanner.nextLine();

String author = scanner.nextLine();

System.out.println("请输入价格");

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("借阅书籍");

Scanner scanner = new Scanner(System.in);

System.out.println("请输入你要借阅的图书：");

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("此书已经借出了！");

return;

}

book.setBorrowed(true);

System.out.println("借阅成功！");

return;

}

}

System.out.println("没系统未收录这本书！");

}

}

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("请输入要删除的书名:");

Scanner scanner = new FIEjyshScanner(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

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("删除成功!");

}

}

修改

public class DelOperation implements IOperation{

@Override

public void work(BookList bookList) {

System.out.println("请输入要删除的书名:");

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("系统中没有这本书");

return;

}

for(int j = pos; j < size-1; j++) {

bookList.setBooks(j, bookList.getBook(j + 1));

}

bookList.setUsedSize(size-1);

System.out.println("删除成功!");

}

}

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("请输入要查找的书名");

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("请输入你要归还的书名：");

String name = scanner.nextLine();

for (int i = 0; i < bookList.getUsedSize(); i++) {

Book book = bookList.getBook(i);

if(book.getName().equals(name)) {

//说明有这本书

book.setBorrowed(false);

System.out.println("归还成功！");

return;

}

}

System.out.println("系统未找到本书的相关信息！");

}

}

接口 IOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.booklist.BookList;

public interface IOperation {

void work(BookList bookList);

}

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("删除成功!");

}

}

修改

public class DelOperation implements IOperation{

@Override

public void work(BookList bookList) {

System.out.println("请输入要删除的书名:");

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("系统中没有这本书");

return;

}

for(int j = pos; j < size-1; j++) {

bookList.setBooks(j, bookList.getBook(j + 1));

}

bookList.setUsedSize(size-1);

System.out.println("删除成功!");

}

}

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("请输入要查找的书名");

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("请输入你要归还的书名：");

String name = scanner.nextLine();

for (int i = 0; i < bookList.getUsedSize(); i++) {

Book book = bookList.getBook(i);

if(book.getName().equals(name)) {

//说明有这本书

book.setBorrowed(false);

System.out.println("归还成功！");

return;

}

}

System.out.println("系统未找到本书的相关信息！");

}

}

接口 IOperation

package com.src1.booksystem.operation;

import com.src1.booksystem.booklist.BookList;

public interface IOperation {

void work(BookList bookList);

}

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