java實(shí)現(xiàn)圖書館管理系統(tǒng)

更新時(shí)間：2019年10月25日 14:54:29 作者：lijiangjiajun

這篇文章主要為大家詳細(xì)介紹了java實(shí)現(xiàn)圖書館管理系統(tǒng)，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了java實(shí)現(xiàn)圖書館管理系統(tǒng)的具體代碼，供大家參考，具體內(nèi)容如下

思路：所有包都在book_manage包里

利用面向?qū)ο蟮亩鄳B(tài)特性去除了很多if-else的判斷，不同的子類在父類所對應(yīng)的方法不同。

1.首先建立一個(gè)book包

包里面有2個(gè)類，一個(gè)是Book,這個(gè)類里面包含一本書的全部信息
另外一個(gè)類是BookList，這個(gè)類是用來管理每一個(gè)書，通過這個(gè)類來尋找每一本書。
private Book[] books = new Book[100];
Book數(shù)組里面存放所有的書。

2.再建立一個(gè)包Operation 這個(gè)類里面有一個(gè)OI接口，通過對接口里面的Work方法重寫，來實(shí)現(xiàn)管理員身份和普通用戶身份的不同操作。

3.最后建立一個(gè)User包，里面有三個(gè)類，User，Admin,NormalUser

Admin和NormalUser都繼承自User.
User里秒你有一個(gè)數(shù)組
protected IO[] operation;
這個(gè)數(shù)組里面包含了用戶或者管理員所具備的操作。
通過對數(shù)組的索引來確定具體需要調(diào)用的操作方法。

下面來看看代碼吧：

book包

Book類

package book_manager.book;

public class Book {
 private String name;
 private String id;
 private String author;
 private int price;
 private String type;
 private boolean isBorrow;

 public Book(String name, String id, String author, int price,
 String type, boolean isBorrow) {
 this.name = name;
 this.id = id;
 this.author = author;
 this.price = price;
 this.type = type;
 this.isBorrow = isBorrow;
 }

 @Override //Object中內(nèi)置的類，用來格式化打印book的信息
 public String toString() {
 return "Book{" +
 "name='" + name + '\'' +
 ", id='" + id + '\'' +
 ", author='" + author + '\'' +
 ", price=" + price +
 ", type='" + type + '\'' +
 ", isBorrow=" + isBorrow +
 '}';
 }

 public String getName(){
 return name;
 }

 public boolean isBorrow(){
 return isBorrow;
 }

 public void setBorrow(boolean bool){
 this.isBorrow=bool;
 }

 public String getId(){
 return id;
 }
}

BookList類

package book_manager.book;

import java.util.Arrays;

public class BookList {
 private Book[] books = new Book[100];
 private int size;
 public BookList(){
 books[0] = new Book("金瓶梅",
  "001", "蘭陵笑笑生", 100,
  "古典名著", false);
 books[1] = new Book("水滸傳",
  "002", "施耐庵", 100,
  "古典名著", false);
 books[2] = new Book("西游記",
  "003", "吳承恩", 100,
  "古典名著", false);
 size = 3;
 }

 public int getSize(){
  return size;
 }

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

 public void setSize(int size){
  this.size=size;
 }

 public Book getBook(int index){
  return books[index];
 }
}

Operation包：

ADD類

package book_manager.Operation;

import book_manager.book.*;

import java.util.Scanner;

public class ADD implements IO{

 @Override
 public void work(BookList bookList) {
 Scanner scanner = new Scanner(System.in);
 System.out.println("請輸入書名");
 String name =scanner.next();
 System.out.println("請輸入序號");
 String id = scanner.next();
 System.out.println("請輸入作者");
 String author =scanner.next();
 System.out.println("請輸入價(jià)格");
 int price = scanner.nextInt();
 System.out.println("請輸入類型");
 String type = scanner.next();
 Book book = new Book(name, id,
  author, price, type, false);
 bookList.setBooks(bookList.getSize(),book);
 bookList.setSize(bookList.getSize()+1);
 System.out.println("添加成功");
 }
}

Borrow類

package book_manager.Operation;

import book_manager.book.Book;
import book_manager.book.BookList;

import java.util.Scanner;

public class Borrow implements IO{
 @Override
 public void work(BookList bookList) {
 int i=0;
 int flag=0;
 Scanner scan = new Scanner(System.in);

 System.out.println("請輸入需要借閱的書名");
 String name = scan.next();
 for(;i<bookList.getSize();i++){
  if(name.equals(bookList.getBook(i).getName())){
  if(bookList.getBook(i).isBorrow()==false){
   System.out.println("借閱成功");
   flag=1;
   bookList.getBook(i).setBorrow(true);
  }

  }
  }
 if(flag==0){
  System.out.println("不好意思，借閱失敗");
 }

 }
}

Delete類

package book_manager.Operation;

import book_manager.book.BookList;

import java.util.Scanner;

public class Delete implements IO{

 public void work(BookList bookList){
 Scanner scanner = new Scanner(System.in);
 System.out.println("請輸入想要?jiǎng)h除的編號");
 String id = scanner.next();
 for(int i=0;i<bookList.getSize();i++){
  if(bookList.getBook(i).getId().equals(id)){
  bookList.setBooks(i,bookList.getBook(bookList.getSize()));
  bookList.setSize(bookList.getSize()-1);
  System.out.println("刪除成功");
  }
  else{
  System.out.println("刪除失敗");
  }
 }
 }
}

Exit類

package book_manager.Operation;

import book_manager.book.BookList;

public class Exit implements IO{
 @Override
 public void work(BookList bookList) {
 System.out.println("退出成功");
 System.exit(0);
 }
}

Find類

package book_manager.Operation;

import book_manager.book.BookList;

import java.util.Scanner;

public class Find implements IO{
 @Override
 public void work(BookList bookList) {
 int i=0;
 int count=0;
 Scanner scan = new Scanner(System.in);

 System.out.println("請輸入需要查找的書名");
 String name = scan.next();
 for(;i<bookList.getSize();i++){
  if(name.equals(bookList.getBook(i).getName())){
  count++;
  }
 }
 if(count==0){
  System.out.println("不好意思，沒有找到");
 }
 else{
  System.out.println("找到了，共計(jì)"+count+"本");
 }
 }
}

IO接口

package book_manager.Operation;

import book_manager.book.BookList;

public interface IO {
 abstract public void work(BookList bookList);
}

PrintAll類

package book_manager.Operation;

import book_manager.book.BookList;

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

}

Return類

package book_manager.Operation;

import book_manager.book.BookList;

import java.util.Scanner;

public class Return implements IO{
 @Override
 public void work(BookList bookList) {
 int i=0;
 int flag=0;
 Scanner scan = new Scanner(System.in);

 System.out.println("請輸入需要?dú)w還的ID");
 String id = scan.next();
 for(;i<bookList.getSize();i++){
  if(id.equals(bookList.getBook(i).getId())){
  if(bookList.getBook(i).isBorrow()==true){
   System.out.println("歸還成功");
   bookList.getBook(i).setBorrow(false);
   flag=1;
  }
  else{
   System.out.println("歸還失敗");
  }
  }

 }
 if(flag==0){
  System.out.println("不好意思，沒有此書");
 }

 }
}

user包:

User類

package book_manager.user;

import book_manager.Operation.*;
import book_manager.Operation.IO;
import book_manager.book.BookList;

abstract public class User {
 String name;
 protected IO[] operation;

 public User(String name){
 this.name=name;
 }

 abstract public int menu();//該方法被重寫
 public void doOperation(int choice, BookList bookList) {
 operation[choice].work(bookList);
 }
}

Admin類

package book_manager.user;

import book_manager.Operation.*;

import java.util.Scanner;

public class Admin extends User{
 public Admin(String name){
 super(name);
 operation=new IO[]{
  new Exit(),
  new Find(),
  new ADD(),
  new Delete(),
  new PrintAll(),
 };

 }


 public int menu() {
 System.out.println("============");
 System.out.println("hello " + name);
 System.out.println("1. 查找書籍");
 System.out.println("2. 增加書籍");
 System.out.println("3. 刪除書籍");
 System.out.println("4. 打印所有信息");
 System.out.println("0. 退出");
 System.out.println("============");
 System.out.println("請輸入您的選擇: ");
 Scanner scanner = new Scanner(System.in);
 int choice = scanner.nextInt();
 return choice;
 }
 
}

NormalUser

package book_manager.user;

import book_manager.Operation.*;

import java.util.Scanner;

public class NormalUser extends User{
 public NormalUser(String name){
 super(name);
 operation=new IO[]{
  new Exit(),
  new Find(),
  new Borrow(),
  new Return(),
  new PrintAll()
 };
 }
 public int menu() {
 System.out.println("============");
 System.out.println("hello " + name);
 System.out.println("1. 查找圖書");
 System.out.println("2. 借閱圖書");
 System.out.println("3. 歸還圖書");
 System.out.println("4. 查看全部書籍");
 System.out.println("0. 退出");
 System.out.println("============");
 System.out.println("請輸入您的選擇: ");
 Scanner scanner = new Scanner(System.in);
 int choice = scanner.nextInt();
 // close 本質(zhì)上是在關(guān)閉 System.in
 // 由于后面還需要用到 System.in, 此處不能盲目關(guān)閉.
 // scanner.close();
 return choice;
 }

}

最后還有一個(gè)Test類，里面放了main函數(shù)

package book_manager;

import book_manager.book.BookList;
import book_manager.user.Admin;
import book_manager.user.NormalUser;
import book_manager.user.User;

import java.util.Scanner;

public class Test {
 public static void main(String[] args) {
 BookList list = new BookList();
 User user = login();
 //通過不同的choice和身份調(diào)用不同的Operation方法
  while(true){
  int choice = user.menu();
  user.doOperation(choice, list);
 }
 }

 public static User login(){
 Scanner scanner = new Scanner(System.in);
 System.out.println("請輸入你的姓名");
 String name = scanner.next();
 System.out.println("請輸入你的身份");
 System.out.println("1.普通用戶 2.管理員");
 int role= scanner.nextInt();
 if(role==1){
  return new NormalUser(name);
 }
 else{
  return new Admin(name);
 }

 }
}

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以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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