Java面向对象总结性项目 之 图书馆管理代码

简介

利用前面所学的知识点：类，抽象类，封装，继承，多态，接口等进行的一个简单的代码练习。

核心需求

1. 简单的登录功能
2. 对于管理员，实现以下功能：
   查找书籍
   增加书籍
   删除书籍
   显示所有图书
   退出系统
3. 对于用户，实现以下功能：
   查询书籍
   借阅书籍
   归还书籍
   退出系统

类的设计

架构

该Java程序架构如下

创建图书相关的类

package book;public class Book {private String name;//书名private String author;//作者private int price;//价格private String type;//类型private boolean status;//状态public Book(String name, String author, int price, String type) {this.name = name;this.author = author;this.price = price;this.type = type;}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 String getType() {return type;}public void setType(String type) {this.type = type;}public boolean isStatus() {return status;}public void setStatus(boolean status) {this.status = status;}@Overridepublic String toString() {return "Book{" +"name='" + name + '\'' +", author='" + author + '\'' +", price=" + price +", type='" + type + '\'' +", status=" + /*status +*/( (status == true)?"‘借出’":"‘未借出’")+'}';}
}

创建书架相关的类

package book;public class BookList {private Book[] books;private int usedSize;public BookList() {this.books = new Book[10];books[0] = new Book("三国演义","罗贯中",56,"小说");books[1] = new Book("水浒传","施耐庵",58,"小说");books[2] = new Book("西游记","吴承恩",66,"小说");books[3] = new Book("红楼梦","曹雪芹",46,"小说");this.usedSize = 4;}//尾插法public void setBooks(int pos,Book book){this.books[pos] = book;}public Book getBook(int pos){return this.books[pos];}public int getUsedSize() {return usedSize;}public void setUsedSize(int usedSize) {this.usedSize = usedSize;}
}

创建用户相关的类

package user;import book.BookList;
import operation.IOperation;public abstract class User {public String name;public IOperation[] operations;public User(String name){this.name = name;}public abstract int menu();public void doOperation(int choice, BookList bookList){this.operations[choice].work(bookList