JAVA超简易图书管理系统,一看就懂,超简单仅使用条件控制语句和变量完成------JAVA入门基础教程

图书类

package Libary;

public class Book
{
    String ISBN;
    String bookName;
    String author;
    String publisher;
    double price;

    public Book( String isbn ,String name ,String author ,String publisher ,double price)
    {
        ISBN = isbn;
        bookName = name;
        author = author;
        publisher = publisher;
        price = price;
    }
    public String getISBN()
    {
        return ISBN;
    }

    public String getBookName()
    {
        return bookName;
    }

    public String getauthor()
    {
        return author;
    }

    public String getPublisher()
    {
        return publisher;
    }

    public double getPrice()
    {
        return price;
    }

    public void setISBN(String ISBN)
    {
        this.ISBN = ISBN;
    }

    public void setBookName(String bookName)
    {
        this.bookName = bookName;
    }

    public void setAuthor(String author)
    {
        this.author = author;
    }

    public void setPublisher(String publisher)
    {
        this.publisher = publisher;
    }

    public void setPrice(double price)
    {
        this.price = price;
    }

    @Override
    public String toString()
    {
        return "Book{" +
                "ISBN='" + ISBN + '\'' +
                ", bookName='" + bookName + '\'' +
                ", author='" + author + '\'' +
                ", publisher='" + publisher + '\'' +
                ", price=" + price +
                '}';
    }
}

package Libary;

public class Book
{
    String ISBN;
    String bookName;
    String author;
    String publisher;
    double price;

    public Book( String isbn ,String name ,String author ,String publisher ,double price)
    {
        ISBN = isbn;
        bookName = name;
        author = author;
        publisher = publisher;
        price = price;
    }
    public String getISBN()
    {
        return ISBN;
    }

    public String getBookName()
    {
        return bookName;
    }

    public String getauthor()
    {
        return author;
    }

    public String getPublisher()
    {
        return publisher;
    }

    public double getPrice()
    {
        return price;
    }

    public void setISBN(String ISBN)
    {
        this.ISBN = ISBN;
    }

    public void setBookName(String bookName)
    {
        this.bookName = bookName;
    }

    public void setAuthor(String author)
    {
        this.author = author;
    }

    public void setPublisher(String publisher)
    {
        this.publisher = publisher;
    }

    public void setPrice(double price)
    {
        this.price = price;
    }

    @Override
    public String toString()
    {
        return "Book{" +
                "ISBN='" + ISBN + '\'' +
                ", bookName='" + bookName + '\'' +
                ", author='" + author + '\'' +
                ", publisher='" + publisher + '\'' +
                ", price=" + price +
                '}';
    }
}

读者类 

package Libary;

public class Reader
{
    private String Password;
    private int ID;
    private String Name;
    double Balance;
    private static int nextReaderID;

    static
    {
        nextReaderID = 10000001;
    }

    public int GetID1()
    {
        System.out.println("您的账号初始ID为"+ID);
        return ID;
    }

    public int GetID2()
    {
        System.out.println("您的账号ID为"+ID);
        return ID;
    }

    public void setPassword(String password)
    {
        this.Password = password;
    }

    public void setID(int id)
    {
        this.ID = id;
    }

    public void setName(String name)
    {
        this.Name = name;
    }

    public void setBalance(double balance)
    {
        Balance = balance + Balance;
        System.out.println("充值成功");
    }

    public void SpentBalance(double balance)
    {
        Balance = balance - Balance;
        System.out.println("消费成功");
    }

    public String GetPassword()
    {
        System.out.print("您设置的密码是:");
        return Password;
    }

    public String GetName()
    {
        System.out.print("您设置的用户名是:");
        return Name;
    }

    public double GetBalance()
    {
        System.out.print("您当前的余额为:");
        return Balance;
    }

    public Reader()
    {
        ID = nextReaderID++;
        Name = "";
        Password = "66666666";
        Balance = 0;
    }

    Reader(String name)
    {
        this();
        this.Name = name;
    }

    @Override
    public String toString()
    {
        return "Reader{" +
                "Password='" + Password + '\'' +
                ", ID=" + ID +
                ", Name='" + Name + '\'' +
                ", Balance=" + Balance +
                '}';
    }
}

package Libary;

public class Reader
{
    private String Password;
    private int ID;
    private String Name;
    double Balance;
    private static int nextReaderID;

    static
    {
        nextReaderID = 10000001;
    }

    public int GetID1()
    {
        System.out.println("您的账号初始ID为"+ID);
        return ID;
    }

    public int GetID2()
    {
        System.out.println("您的账号ID为"+ID);
        return ID;
    }

    public void setPassword(String password)
    {
        this.Password = password;
    }

    public void setID(int id)
    {
        this.ID = id;
    }

    public void setName(String name)
    {
        this.Name = name;
    }

    public void setBalance(double balance)
    {
        Balance = balance + Balance;
        System.out.println("充值成功");
    }

    public void SpentBalance(double balance)
    {
        Balance = balance - Balance;
        System.out.println("消费成功");
    }

    public String GetPassword()
    {
        System.out.print("您设置的密码是:");
        return Password;
    }

    public String GetName()
    {
        System.out.print("您设置的用户名是:");
        return Name;
    }

    public double GetBalance()
    {
        System.out.print("您当前的余额为:");
        return Balance;
    }

    public Reader()
    {
        ID = nextReaderID++;
        Name = "";
        Password = "66666666";
        Balance = 0;
    }

    Reader(String name)
    {
        this();
        this.Name = name;
    }

    @Override
    public String toString()
    {
        return "Reader{" +
                "Password='" + Password + '\'' +
                ", ID=" + ID +
                ", Name='" + Name + '\'' +
                ", Balance=" + Balance +
                '}';
    }
}

系统类

package Libary;

import java.util.Scanner;
public class LibarySystem
{
    static int num = 0;
    static Scanner in = new Scanner(System.in);

    private static void Welcome()
    {
        System.out.println("欢迎来到图书馆");
        System.out.println("1.创建个人账号");
        System.out.println("2.我要借书");
    }

    private static void Done()
    {
        System.out.println("--------------");
        System.out.println("您的设置完成");
        System.out.println("--------------");
    }

    private static void Password()
    {
        System.out.println("设置您的密码");
    }

    private static void Hello()
    {
        System.out.println("由于本馆数据库系统尚未部署完成,目前仅支持内部借书服务");
        System.out.println("您现在正以管理员的身份进行操作");
    }

    private static void Error()
    {
        System.out.println("您的输入有误");
    }

    public static void main(String args[])
    {
        boolean run = true;
        while(run == true)
        {
            Welcome();
            int choice = in.nextInt();
            switch(choice)
            {
                case 1:
                {
                    Reader R = new Reader();
                    R.GetID1();
                    Password();
                    String password = in.next();
                    if(password.length() <= 7)
                    {
                        System.out.println("密码长度不得少于8位");
                        Password();
                        password = in.next();
                    }
                    R.setPassword(password);
                    Done();
                    System.out.println("选择一个你喜欢的名字吧");
                    String name = in.next();
                    R.setName(name);
                    Done();
                    System.out.println(R.GetBalance());
                    System.out.println(R.GetName());
                    System.out.println(R.GetPassword());
                    break;
                }

                case 2:
                {
                    Hello();
                    Reader r = new Reader();
                    r.setName("郭靖");
                    Book sdyxz = new Book("001","射雕英雄传","金庸","商务印书馆",27.99);
                    Book sdxl = new Book("002","神雕侠侣","金庸","商务印书馆",27.99);
                    Book sjecl = new Book("003","书剑恩仇录","金庸","商务印书馆",27.99);
                    Book tlbb = new Book("004","天龙八部","金庸","商务印书馆",27.99);
                    Book yttlj = new Book("005","倚天屠龙记","金庸","商务印书馆",27.99);
                    System.out.println(r.GetBalance());
                    System.out.println("您是否要充值账户,确认需要充值输入1,否输入2");
                    int decision = in.nextInt();
                    switch(decision)
                    {
                        case 1:
                        {
                            System.out.println("您充值的金额是:");
                            double Balance = in.nextDouble();
                            if(Balance < 0)
                            {
                                System.out.print("充值金额不能为负数,");
                                System.out.println("您充值的金额是:");
                                Balance = in.nextDouble();
                            }
                            r.setBalance(Balance);
                            break;
                        }

                        case 2:
                        {
                            System.out.println("金额不足将无法借书");
                            break;
                        }

                        default:
                        {
                            Error();
                            break;
                        }
                    }
                    System.out.print("馆内现藏的书有");
                    System.out.println(sdyxz);
                    System.out.println(sdxl);
                    System.out.println(sjecl);
                    System.out.println(tlbb);
                    System.out.println(yttlj);
                    System.out.println("请输入您要借的书的编号");
                    int num = in.nextInt();
                    double price = 0.0;
                    if(num == 001)
                    {
                        price = sdyxz.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(sdyxz);
                    }
                    else if(num == 002)
                    {
                        price = sdxl.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(sdxl);
                    }
                    else if(num == 003)
                    {
                        price = sjecl.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(sjecl);
                    }
                    else if(num == 004)
                    {
                        price = tlbb.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(tlbb);
                    }
                    else if(num == 005)
                    {
                        price = yttlj.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(yttlj);
                    }
                    else
                    {
                        Error();
                    }
                    break;
                }

                default:
                {
                    Error();
                    break;
                }
            }
        }
    }
}

package Libary;

import java.util.Scanner;
public class LibarySystem
{
    static int num = 0;
    static Scanner in = new Scanner(System.in);

    private static void Welcome()
    {
        System.out.println("欢迎来到图书馆");
        System.out.println("1.创建个人账号");
        System.out.println("2.我要借书");
    }

    private static void Done()
    {
        System.out.println("--------------");
        System.out.println("您的设置完成");
        System.out.println("--------------");
    }

    private static void Password()
    {
        System.out.println("设置您的密码");
    }

    private static void Hello()
    {
        System.out.println("由于本馆数据库系统尚未部署完成,目前仅支持内部借书服务");
        System.out.println("您现在正以管理员的身份进行操作");
    }

    private static void Error()
    {
        System.out.println("您的输入有误");
    }

    public static void main(String args[])
    {
        boolean run = true;
        while(run == true)
        {
            Welcome();
            int choice = in.nextInt();
            switch(choice)
            {
                case 1:
                {
                    Reader R = new Reader();
                    R.GetID1();
                    Password();
                    String password = in.next();
                    if(password.length() <= 7)
                    {
                        System.out.println("密码长度不得少于8位");
                        Password();
                        password = in.next();
                    }
                    R.setPassword(password);
                    Done();
                    System.out.println("选择一个你喜欢的名字吧");
                    String name = in.next();
                    R.setName(name);
                    Done();
                    System.out.println(R.GetBalance());
                    System.out.println(R.GetName());
                    System.out.println(R.GetPassword());
                    break;
                }

                case 2:
                {
                    Hello();
                    Reader r = new Reader();
                    r.setName("郭靖");
                    Book sdyxz = new Book("001","射雕英雄传","金庸","商务印书馆",27.99);
                    Book sdxl = new Book("002","神雕侠侣","金庸","商务印书馆",27.99);
                    Book sjecl = new Book("003","书剑恩仇录","金庸","商务印书馆",27.99);
                    Book tlbb = new Book("004","天龙八部","金庸","商务印书馆",27.99);
                    Book yttlj = new Book("005","倚天屠龙记","金庸","商务印书馆",27.99);
                    System.out.println(r.GetBalance());
                    System.out.println("您是否要充值账户,确认需要充值输入1,否输入2");
                    int decision = in.nextInt();
                    switch(decision)
                    {
                        case 1:
                        {
                            System.out.println("您充值的金额是:");
                            double Balance = in.nextDouble();
                            if(Balance < 0)
                            {
                                System.out.print("充值金额不能为负数,");
                                System.out.println("您充值的金额是:");
                                Balance = in.nextDouble();
                            }
                            r.setBalance(Balance);
                            break;
                        }

                        case 2:
                        {
                            System.out.println("金额不足将无法借书");
                            break;
                        }

                        default:
                        {
                            Error();
                            break;
                        }
                    }
                    System.out.print("馆内现藏的书有");
                    System.out.println(sdyxz);
                    System.out.println(sdxl);
                    System.out.println(sjecl);
                    System.out.println(tlbb);
                    System.out.println(yttlj);
                    System.out.println("请输入您要借的书的编号");
                    int num = in.nextInt();
                    double price = 0.0;
                    if(num == 001)
                    {
                        price = sdyxz.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(sdyxz);
                    }
                    else if(num == 002)
                    {
                        price = sdxl.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(sdxl);
                    }
                    else if(num == 003)
                    {
                        price = sjecl.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(sjecl);
                    }
                    else if(num == 004)
                    {
                        price = tlbb.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(tlbb);
                    }
                    else if(num == 005)
                    {
                        price = yttlj.getPrice();
                        r.SpentBalance(price);
                        System.out.print("借阅成功,您借到的书籍信息如下");
                        System.out.println(yttlj);
                    }
                    else
                    {
                        Error();
                    }
                    break;
                }

                default:
                {
                    Error();
                    break;
                }
            }
        }
    }
}

VIP读者类

package Libary;

public class VIPReader extends Reader
{
    private String ReaderGrade;
    private double percent;
    private int bonusPoints;

    public VIPReader(String name,String grade)
    {
        super(name);
        ReaderGrade = grade;
        bonusPoints = 0;
        SetPercent();
    }

    public void SetReaderGrade(String grade)
    {
        ReaderGrade = grade;
        SetPercent();
    }

    public String GetReaderGrade(String garde)
    {
        return ReaderGrade;
    }

    public void SetPercent()
    {
        if(ReaderGrade.equals("VIP"))
        {
            percent = 0.8;
        }
        else if (ReaderGrade.equals("普通会员"))
        {
            percent = 0.9;
        }
        else
        {
            percent = 1;
        }
    }

    public double GetPercent()
    {
        return percent;
    }

    public void SetBonusPoints(int point)
    {
        bonusPoints += point;
    }

    public double GetBonusPoints()
    {
        return bonusPoints;
    }

    public boolean PayRent(double rent)
    {
        if(Balance >= rent)
        {
            Balance = Balance - rent;
            return true;
        }
        else
        {
            return false;
        }
    }
    public String toString()
    {
        return super.toString() + "身份:" + ReaderGrade + "当前积分:" + bonusPoints + "享有折扣率:" + percent;
    }
}

package Libary;

public class VIPReader extends Reader
{
    private String ReaderGrade;
    private double percent;
    private int bonusPoints;

    public VIPReader(String name,String grade)
    {
        super(name);
        ReaderGrade = grade;
        bonusPoints = 0;
        SetPercent();
    }

    public void SetReaderGrade(String grade)
    {
        ReaderGrade = grade;
        SetPercent();
    }

    public String GetReaderGrade(String garde)
    {
        return ReaderGrade;
    }

    public void SetPercent()
    {
        if(ReaderGrade.equals("VIP"))
        {
            percent = 0.8;
        }
        else if (ReaderGrade.equals("普通会员"))
        {
            percent = 0.9;
        }
        else
        {
            percent = 1;
        }
    }

    public double GetPercent()
    {
        return percent;
    }

    public void SetBonusPoints(int point)
    {
        bonusPoints += point;
    }

    public double GetBonusPoints()
    {
        return bonusPoints;
    }

    public boolean PayRent(double rent)
    {
        if(Balance >= rent)
        {
            Balance = Balance - rent;
            return true;
        }
        else
        {
            return false;
        }
    }
    public String toString()
    {
        return super.toString() + "身份:" + ReaderGrade + "当前积分:" + bonusPoints + "享有折扣率:" + percent;
    }
}

借书类

package Libary;

public class RentBook extends Book
{
    private String BookNo;
    private boolean state;

    public RentBook(String isbn ,String name ,String author ,String publisher ,double price,String no)
    {
        super(isbn,name,author,publisher,price);
        BookNo = no;
        state = true;
    }

    public void SetBookNo(String no)
    {
        BookNo = no;
    }

    public String GetBookNo()
    {
        return BookNo;
    }

    public void SetState(boolean state)
    {
        this.state = state;
    }

    public boolean GetState()
    {
        return state;
    }

    public String toString()
    {
        return super.toString() + "入库号" + GetBookNo() + "是否可借" + GetState();
    }
}

package Libary;

public class RentBook extends Book
{
    private String BookNo;
    private boolean state;

    public RentBook(String isbn ,String name ,String author ,String publisher ,double price,String no)
    {
        super(isbn,name,author,publisher,price);
        BookNo = no;
        state = true;
    }

    public void SetBookNo(String no)
    {
        BookNo = no;
    }

    public String GetBookNo()
    {
        return BookNo;
    }

    public void SetState(boolean state)
    {
        this.state = state;
    }

    public boolean GetState()
    {
        return state;
    }

    public String toString()
    {
        return super.toString() + "入库号" + GetBookNo() + "是否可借" + GetState();
    }
}