图书馆管理系统源码（Java）

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Book包->内含Book类与BookList类

Book类    用于初始化图书并对其进行操作

BookList类    用于存放多本图书

Book类

package Book;

public class Book {
    private String name;
    private String author;
    private int price;
    private String type;
    private boolean isBorrow;
    //写一个构造方法 初始化图书内容
    public Book(String name,String author,int price,String type) {
        this.author = author;
        this.name = name;
        this.type = type;
        this.price = price;
    }

    @Override
    public String toString() {
        return "Book{" +
                "name='" + name + '\'' +
                ", author='" + author + '\'' +
                ", price=" + price +
                ", type='" + type + '\'' +
                ",isBorrow='"+isBorrow()
                + '}';
    }

    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 isBorrow() {
        return isBorrow;
    }

    public void setBorrow(boolean borrow) {
        isBorrow = borrow;
    }
}

BookList类

package Book;

public class BookList {
    private Book[] books;
    private int usedSize;
    //假设书架的容量大小为十本书  usedSize是此时书架上有几本书
    //初始化几本书（可以自定义）
    public BookList() {
        this.books = new Book[10];
        books[0] = new Book("西游记","施耐庵",10,"小说");
        books[1] = new Book("红楼梦","曹雪芹",14,"小说");
        books[2] = new Book("三国演义","罗贯中",15,"小说");
        this.usedSize = 3;
    }

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

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

    public int getUsedSize() {
        return usedSize;
    }

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

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operatio包

Operation接口

package operation;

import Book.BookList;

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

AddOperation 类

package operation;

import Book.Book;
import Book.BookList;

import java.util.Scanner;

public class AddOperation implements Operation {
    @Override
    public void work(BookList bookList) {
        System.out.println("新增图书->");
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入书名->");
        String name = scan.next();
        System.out.println("请输入作者->");
        String author = scan.next();
        System.out.println("请输入价格->");
        int price = scan.nextInt();
        System.out.println("请输入类型->");
        String type = scan.next();
        Book book = new Book(name,author,price,type);
        bookList.setBooks(book,bookList.getUsedSize());
        System.out.println("添加图书成功！");
        bookList.setUsedSize(bookList.getUsedSize()+1);
    }
}

BorrowOperation 类

package operation;

import Book.Book;
import Book.BookList;

import java.util.Scanner;

public class BorrowOperation implements Operation {
    @Override
    public void work(BookList bookList) {
        Scanner scan = new Scanner(System.in);
        System.out.println("借阅图书->");
        System.out.println("请输入要借阅的书名->");
        String name = scan.next();
        int tmp =bookList.getUsedSize();
        for (int i = 0; i < tmp; i++) {
            Book book = bookList.getBooks(i);
            if(name.equals(book.getName())) {
                bookList.getBooks(i).setBorrow(false);
                System.out.println("借阅成功！");
                System.out.println(bookList.getBooks(i).toString());
                return;
            }
        }
        System.out.println("找不到这本书");
    }
}

ExitOperation 类

package operation;

import Book.BookList;

public class ExitOperation implements Operation {
    @Override
    public void work(BookList bookList) {
        System.out.println("退出系统->");
        System.exit(0);
    }
}

FindOperation 类

package operation;

import Book.BookList;
import Book.Book;
import java.util.Scanner;

public class FindOperation implements Operation {
    @Override
    public void work(BookList bookList) {
        System.out.println("查找图书->");
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入要查找的书名->");
        String name = scan.next();
        int tmp =bookList.getUsedSize();
        for (int i = 0; i < tmp; i++) {
            Book book = bookList.getBooks(i);
            if(name.equals(book.getName())) {
                System.out.println("找到这本书了，它的信息是->");
                System.out.println(book.toString());
                return;
            }
        }
        System.out.println("找不到这本书");
    }
}

RemoveOperation 类

package operation;

import Book.Book;
import Book.BookList;

import java.util.Scanner;

public class RemoveOperation implements Operation {
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书->");
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入要删除的书名->");
        String name = scan.next();
        int tmp = bookList.getUsedSize();
        int flag = -1;
        for (int i = 0; i < tmp; i++) {
            Book book = bookList.getBooks(i);
            if(name.equals(book.getName())) {
                flag = i;
            }
        }
        if(flag == -1) {
            System.out.println("没有这本书，删除失败！");
            return;
        }

        for (int i = flag; i < tmp-1; i++) {
            bookList.setBooks(bookList.getBooks(i+1),i);
        }
        bookList.setBooks(null, tmp-1);
        bookList.setUsedSize(tmp-1);
        System.out.println("删除成功！");
    }
}

ReturnOperation 类

package operation;

import Book.Book;
import Book.BookList;

import java.util.Scanner;

public class ReturnOperation implements Operation {
    @Override
    public void work(BookList bookList) {
        Scanner scan = new Scanner(System.in);
        System.out.println("归还图书->");
        System.out.println("请输入要归还的书名->");
        String name = scan.next();
        int tmp =bookList.getUsedSize();
        for (int i = 0; i < tmp; i++) {
            Book book = bookList.getBooks(i);
            if(name.equals(book.getName())) {
                bookList.getBooks(i).setBorrow(true);
                System.out.println("归还成功！");
                System.out.println(bookList.getBooks(i).toString());
                return;
            }
        }
        System.out.println("找不到这本书");
    }
}

ShowOperation 类

package operation;

import Book.BookList;

public class ShowOperation implements Operation {
    @Override
    public void work(BookList bookList) {
        System.out.println("显示图书->");
        int tmp = bookList.getUsedSize();
        for (int i = 0; i < tmp; i++) {
            System.out.println(bookList.getBooks(i).toString());
        }
    }
}

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User包 实现用户操作

User父类

package User;
import Book.BookList;
import operation.*;

public abstract class User {
    protected Operation[] operations;
    protected String name;
    public User(String name) {
        this.name = name;
    }
    public abstract void doOperation(int choice, BookList bookList);
    public abstract int menu();
}

AdminUser子类 实现管理员操作

package User;
import Book.BookList;
import operation.*;

import java.util.Scanner;

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

    }
    @Override
    public void doOperation(int choice, BookList bookList) {
        this.operations[choice].work(bookList);
    }
    @Override
    public int menu() {
        System.out.println("********管理人员菜单********");
        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("请输入您要进行的操作->");
        Scanner scan = new Scanner(System.in);
        int choice = scan.nextInt();
        return choice;
    }

}

NormalUser子类 实现普通用户操作

package User;

import Book.BookList;
import operation.*;

import java.util.Scanner;

public class NormalUser extends User {

    public NormalUser(String name) {
        super(name);
        this.operations = new Operation[] {
                new ExitOperation(),
                new FindOperation(),
                new BorrowOperation(),
                new ReturnOperation()
        };
    }

    @Override
    public void doOperation(int choice, BookList bookList) {
        this.operations[choice].work(bookList);
    }

    public int menu() {
        System.out.println("********读者菜单********");
        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("请输入您要进行的操作->");
        Scanner scan = new Scanner(System.in);
        int choice = scan.nextInt();
        return choice;
    }
}

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Main示例

{
    public static User login() {
        Scanner scan = new Scanner(System.in);
        System.out.println("您的姓名是->");
        String name = scan.next();
        System.out.println("请选择你要登录的系统->");
        System.out.println("1、管理员系统");
        System.out.println("2、读者系统");
        System.out.println("————————————————————");
        int choice = scan.nextInt();
        if(choice == 1) {
            return new AdminUser(name);
        }
        else {
            return new NormalUser(name);
        }
    }

    public static void main(String[] args) {
        BookList bookList = new BookList();
        User user = login();
        while (true) {
            int choice = user.menu();
            user.doOperation(choice,bookList);
        }
    }
}

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