图书管理系统

本文主要是介绍图书管理系统，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

主要实现类

该项目主要采用的技术：面向对象编程思想、数组、接口、if、for循环、方法重载等，非常适合新手学习。

1.Book类图书类

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中内置的类，用来格式化打印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;
   }
}
2.Booklist类图书存放类

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", "兰陵笑笑生", 100, "古典名著", false);
       books[1] = new Book("水浒传", "002", "施耐庵", 100, "古典名著", false);
       books[2] = new Book("西游记", "003", "吴承恩", 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];
   }
}
3.Io接口

package book_manager.book;

public interface IO {

}

4.ADD类添加图书

package book_manager.Operation;
import book_manager.book.*;
import java.util.Scanner;

public class ADD implements IO {

   public void work(BookList bookList) {
       Scanner scanner = new Scanner(System.in);
       System.out.println("请输入书名");
       String name = scanner.next();
       System.out.println("请输入序号");
       String id = scanner.next();
       System.out.println("请输入作者");
       String author = scanner.next();
       System.out.println("请输入价格");
       int price = scanner.nextInt();
       System.out.println("请输入类型");
       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");
   }
}
5.Borrow类借书

package book_manager.Operation;

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

import java.util.Scanner;

public class Borrow implements IO {

   public void work(BookList bookList) {
       int i = 0;
       int flag = 0;
       Scanner scan = new Scanner(System.in);

       System.out.println("请输入需要借阅的书名:");
       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("借阅成功");
                   flag = 1;
                   bookList.getBook(i).setBorrow(true);
               }

           }
       }
       if (flag == 0) {
           System.out.println("不好意思，借阅失败");
       }

}
}
6.Delete类删除图书

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("请输入想要删除的编号");
       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("删除成功");
           } else {
               System.out.println("删除失败");
           }
       }
   }
}
7.exit类退出

package book_manager.Operation;

import book_manager.book.BookList;

public class Exit implements IO{

public void work(BookList bookList) {
System.out.println("退出成功");
System.exit(0);
}
}
8.Find 类查找图书

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("请输入需要查找的书名");
       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，没有找到");
       } else {
           System.out.println("找到了，共计" + count + "本");
       }
   }
}
9.IO类

package book_manager.Operation;

import book_manager.book.BookList;

public interface IO {
abstract public void work(BookList bookList);
}
10.PrintAll类打印图书信息

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));
}
}
}
11.Return类归还图书

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("请输入需要归还的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("归还成功");
bookList.getBook(i).setBorrow(false);
flag=1;
}
else{
System.out.println("归还失败");
}
}

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

}
}
12.Admin 管理员用户

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. 查找书籍");
System.out.println("2. 增加书籍");
System.out.println("3. 删除书籍");
System.out.println("4. 打印所有信息");
System.out.println("0. 退出");
System.out.println("============");
System.out.println("请输入您的选择: ");
Scanner scanner = new Scanner(System.in);
int choice = scanner.nextInt();
return choice;
}

}
13.NormalUser类普通用户

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. 查找图书");
       System.out.println("2. 借阅图书");
       System.out.println("3. 归还图书");
       System.out.println("4. 查看全部书籍");
       System.out.println("0. 退出");
       System.out.println("============");
       System.out.println("请输入您的选择: ");
       Scanner scanner = new Scanner(System.in);
       int choice = scanner.nextInt();
       // close 本质上是在关闭 System.in
       // 由于后面还需要用到 System.in, 此处不能盲目关闭.
       // scanner.close();
       return choice;
   }
}
14.User类用户类

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();//该方法被重写
public void doOperation(int choice, BookList bookList) {
operation[choice].work(bookList);
}
}
15.Test类测试类，主程序入口

package book_manager.user;

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();
//通过不同的choice和身份调用不同的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("请输入你的姓名");
String name = scanner.next();
System.out.println("请输入你的身份");
System.out.println("1.普通用户 2.管理员");
int role= scanner.nextInt();
if(role==1){
return new NormalUser(name);
}
else{
return new Admin(name);
}
}
}

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