JavaSE综合练习-图书系统1.0

Main

import book.BookList;
import user.AdminUser;
import user.NormalUser;
import user.User;
import java.util.Scanner;

//程序入口函数
public class Main {
    public static User login(){
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入你的姓名：");
        String name=scanner.nextLine();

        System.out.println("请输入你的身份，1：管理员  2：普通用户");

        int choice=scanner.nextInt();
        if(choice==1){
            AdminUser adminUser=new AdminUser(name);
            return adminUser;
        }else{
            NormalUser normalUser=new NormalUser(name);
            return normalUser;
        }
    }
    public static void main(String[] args) {
        BookList bookList = new BookList();
        //user有可能引用管理员用户 有可能引用普通用户
        User user = login();
        while (true) {
            int choice = user.menu();
            //伪代码 io[choice].work(书架);
            user.doIoperations(choice, bookList);
        }
    }
}

book

Book

package book;

public class Book {
    private String name;
    private String author;
    private int price;
    private String type;
    private boolean isLend;//是否被借出


    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 isLend() {
        return isLend;
    }

    public void setLend(boolean lend) {
        isLend = lend;
    }

    public Book(String name, String author, int price, String type) {
        this.name = name;
        this.author = author;
        this.price = price;
        this.type = type;
        //this.isLend = isLend;默认值false 未被借出
    }

    @Override
    public String toString() {
        return "Book{" +
                "name='" + name + '\'' +
                ", author='" + author + '\'' +
                ", price=" + price +
                ", type='" + type + '\'' +
                (isLend==true?" 已借出":" 未借出")+
                //", isLend=" + isLend +
                '}';
    }
}

BookList

package book;

//书架
public class BookList {
    private Book[] books = new Book[10];
    private int usedSize;//用来记录当前存放了多少书

    public BookList() {
        books[0] = new Book("三国演义", "罗贯中", 10, "小说");
        books[1] = new Book("西游记", "吴承恩", 12, "小说");
        books[2] = new Book("红楼梦", "曹雪芹", 11, "小说");
        this.usedSize = 3;
    }

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

    public void setBook(int pos,Book book){
        books[pos]=book;
    }

    public int getUsedSize() {
        return usedSize;
    }

    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }

    public boolean isFull() {
        if (this.usedSize == books.length) {
            return true;
        }
        else return false;
    }
}

operation

AddOperation

package operation;

import book.BookList;
import book.Book;

import java.util.Scanner;

public class AddOperation implements IOPeration {
    public void work(BookList bookList){
        System.out.println("新增图书......");

        if(bookList.isFull()){
            System.out.println("书架满了 不能新增了！");
            return;
        }

        System.out.println("请输入你要新增的图书的书名：");
        Scanner scanner=new Scanner(System.in);
        String bookName=scanner.nextLine();

        System.out.println("请输入你要新增的图书的作者：");
        String author=scanner.nextLine();

        System.out.println("请输入你要新增图书的价格：");
        int price=scanner.nextInt();

        System.out.println("请输入你要新增的图书的类型：");
        String type=scanner.nextLine();

        Book book=new Book(bookName,author,price,type);

        int currentSize=bookList.getUsedSize();

        bookList.setBook(currentSize,book);

        bookList.setUsedSize(currentSize+1);

        System.out.println("新增图书成功！");
    }
    //IOPeration[]
}

BorrowedOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class BorrowedOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("借阅图书.......");

        System.out.println("请输入你要借阅的图书的书名：");
        Scanner scanner=new Scanner(System.in);
        String bookName=scanner.nextLine();

        int currentSize=bookList.getUsedSize();
        for(int i=0;i<currentSize;i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(bookName)){
                book.setLend(true);
                System.out.println("借阅成功！");
                return;
            }
        }
        System.out.println("借阅失败！");
    }
}

DelOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("删除图书......");

        System.out.println("请输入你要删除的图书的书名：");
        Scanner scanner=new Scanner(System.in);
        String bookName=scanner.nextLine();

        int currentSize=bookList.getUsedSize();
        int pos=-1;
        int i;
        for(i=0;i<currentSize;i++) {
            Book book = bookList.getBook(i);
            if (book.getName().equals(bookName)) {
                //找到这本书了 记录下标
                pos=i;
                break;
            }
        }
        if(i>=currentSize){
            System.out.println("没有你要找的书！");
            return;
        }
        //开始删除
        for (int j = pos; j <currentSize-1 ; j++) {
            Book book=bookList.getBook(j+1);
            bookList.setBook(j,book);
        }
        bookList.setUsedSize(currentSize-1);

        bookList.setBook(currentSize-1,null);

        System.out.println("删除成功！");
    }
}

ExitOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("删除图书......");

        System.out.println("请输入你要删除的图书的书名：");
        Scanner scanner=new Scanner(System.in);
        String bookName=scanner.nextLine();

        int currentSize=bookList.getUsedSize();
        int pos=-1;
        int i;
        for(i=0;i<currentSize;i++) {
            Book book = bookList.getBook(i);
            if (book.getName().equals(bookName)) {
                //找到这本书了 记录下标
                pos=i;
                break;
            }
        }
        if(i>=currentSize){
            System.out.println("没有你要找的书！");
            return;
        }
        //开始删除
        for (int j = pos; j <currentSize-1 ; j++) {
            Book book=bookList.getBook(j+1);
            bookList.setBook(j,book);
        }
        bookList.setUsedSize(currentSize-1);

        bookList.setBook(currentSize-1,null);

        System.out.println("删除成功！");
    }
}

ReturnOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class ReturnOperation implements IOPeration {
    @Override
    public void work(BookList bookList) {
        System.out.println("归还图书......");

        System.out.println("请输入你要归还的图书的书名：");
        Scanner scanner = new Scanner(System.in);
        String bookName = scanner.nextLine();

        int currentSize = bookList.getUsedSize();

        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if (book.getName().equals(bookName)) {
                book.setLend(false);
                System.out.println("归还成功！");
                return;
            }
        }
        System.out.println("归还失败！");
    }
}

ShowOperation

package operation;
import book.Book;
import book.BookList;
public class ShowOperation implements IOPeration {
    public void work(BookList bookList) {
        System.out.println("显示图书.......");
        int currentSize = bookList.getUsedSize();

        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            System.out.println(book);
        }
    }
}

FindOperation

package operation;
import book.Book;
import book.BookList;

import java.util.Scanner;


public class FindOperation implements IOPeration {
    public void work(BookList bookList){
        System.out.println("查找图书......");
        System.out.println("请输入你要查找的图书名：");
        Scanner scanner=new Scanner(System.in);
        String bookName= scanner.nextLine();

        int currentSize= bookList.getUsedSize();

        for(int i=0;i<currentSize;i++){
            Book book=bookList.getBook(i);
            if(book.getName().equals(bookName)){
                System.out.println("找到了这本书：");
                System.out.println(book);
                return;
            }
        }
        System.out.println("没有你要找的书......");
    }
}

IOPration

package operation;
import book.Book;
import book.BookList;

import java.util.Scanner;


package operation;

import book.BookList;

public interface IOPeration {
     void work(BookList bookList);
}

user

AdminUser

package user;

import operation.*;

import java.util.Scanner;

public class AdminUser extends User{
    public AdminUser(String name) {
        super(name);
        this.ioPerations=new IOPeration[]{
                new ExitOperation(),
                new FindOperation(),
                new AddOperation(),
                new DelOperation(),
                new ShowOperation(),
        };
    }

    public int menu(){
        System.out.println("******管理员菜单******");
        System.out.println("1.查找图书");
        System.out.println("2.新增图书");
        System.out.println("3.删除图书");
        System.out.println("4.显示图书");
        System.out.println("0.退出系统");
        System.out.println("**********************");
        System.out.println("请输入你的操作：");
        Scanner scanner=new Scanner(System.in);
        int choice= scanner.nextInt();
        return choice;
    }
}

NormalUser

package user;

import operation.*;

import java.util.Scanner;

public class NormalUser extends User{
    public NormalUser(String name) {
        super(name);
        this.ioPerations=new IOPeration[]{
                new ExitOperation(),
                new FindOperation(),
                new BorrowedOperation(),
                new ReturnOperation(),
        };
    }
    public int menu(){
        System.out.println("******普通用户菜单******");
        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("0.退出系统");
        System.out.println("**********************");
        System.out.println("请输入你的操作：");
        Scanner scanner=new Scanner(System.in);
        int choice= scanner.nextInt();
        return choice;
    }
}

User

package user;
import book.BookList;
import operation.IOPeration;

import operation.IOPeration;
public abstract class User {
    protected String name;
    protected IOPeration[] ioPerations;
    public User(String name){
        this.name=name;
    }
    public abstract int menu();

    public void doIoperations(int choice,BookList bookList){
        this.ioPerations[choice].work(bookList);
    }
}