用java编写图书管理系统

一个简单的图书管理系统通常包含图书的增加、删除、查询和显示等基本功能。

以下是一个用 Java 编写的简单图书管理系统的示例代码。

import java.util.ArrayList;
import java.util.Scanner;

class Book {
    private String title;
    private String author;

    public Book(String title, String author) {
        this.title = title;
        this.author = author;
    }

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    @Override
    public String toString() {
        return "Title: " + title + ", Author: " + author;
    }
}

class Library {
    private ArrayList books;

    public Library() {
        this.books = new ArrayList<>();
    }

    public void addBook(Book book) {
        books.add(book);
        System.out.println("Book added successfully.");
    }

    public void removeBook(String title) {
        for (Book book : books) {
            if (book.getTitle().equalsIgnoreCase(title)) {
                books.remove(book);
                System.out.println("Book removed successfully.");
                return;
            }
        }
        System.out.println("Book not found.");
    }

    public void displayBooks() {
        if (books.isEmpty()) {
            System.out.println("No books in the library.");
        } else {
            System.out.println("Books in the library:");
            for (Book book : books) {
                System.out.println(book);
            }
        }
    }

    public Book findBook(String title) {
        for (Book book : books) {
            if (book.getTitle().equalsIgnoreCase(title)) {
                return book;
            }
        }
        return null;
    }
}

public class LibraryManagementSystem {
    public static void main(String[] args) {
        Library library = new Library();
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("\nLibrary Management System");
            System.out.println("1. Add Book");
            System.out.println("2. Remove Book");
            System.out.println("3. Display Books");
            System.out.println("4. Find Book");
            System.out.println("5. Exit");
            System.out.print("Enter your choice: ");

            int choice = scanner.nextInt();
            scanner.nextLine(); // Consume newline

            switch (choice) {
                case 1:
                    System.out.print("Enter book title: ");
                    String title = scanner.nextLine();
                    System.out.print("Enter book author: ");
                    String author = scanner.nextLine();
                    Book newBook = new Book(title, author);
                    library.addBook(newBook);
                    break;

                case 2:
                    System.out.print("Enter book title to remove: ");
                    String titleToRemove = scanner.nextLine();
                    library.removeBook(titleToRemove);
                    break;

                case 3:
                    library.displayBooks();
                    break;

                case 4:
                    System.out.print("Enter book title to find: ");
                    String titleToFind = scanner.nextLine();
                    Book foundBook = library.findBook(titleToFind);
                    if (foundBook != null) {
                        System.out.println("Book found: " + foundBook);
                    } else {
                        System.out.println("Book not found.");
                    }
                    break;

                case 5:
                    System.out.println("Exiting the program.");
                    System.exit(0);

                default:
                    System.out.println("Invalid choice. Please enter a valid option.");
            }
        }
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129

这个简单的图书管理系统允许用户添加书籍、删除书籍、显示所有书籍以及查找书籍。用户可以通过输入选项的数字来执行相应的操作。这只是一个基本示例，实际的系统可能需要更多功能和更复杂的设计。