java单链表实现书籍管理系统

为了实现“java单链表实现书籍管理系统”，我们需要完成以下步骤：

1. 定义Book类，包括属性：书名、作者、出版社、ISBN编号等
2. 定义Node类，包括属性：存储的Book对象、指向下一个节点的引用Next等
3. 定义LinkedList类，包括属性：链表长度、头节点引用head等
4. 实现LinkedList类的各种操作方法，例如增加、删除、修改、查找、遍历等

下面是简单的代码示例：

Book类定义

public class Book {
    private String name;
    private String author;
    private String press;
    private String isbn;

    public Book(String name, String author, String press, String isbn) {
        this.name = name;
        this.author = author;
        this.press = press;
        this.isbn = isbn;
    }

    // Getter and Setter methods omitted for brevity
}

Node类定义

public class Node {
    private Book book;
    private Node next;

    public Node(Book book) {
        this.book = book;
        this.next = null;
    }

    // Getter and Setter methods omitted for brevity
}

LinkedList类定义

public class LinkedList {
    private Node head;
    private int length;

    public LinkedList() {
        this.head = null;
        this.length = 0;
    }

    // Getter and Setter methods omitted for brevity

    // Add a book to the linked list
    public void addBook(Book book) {
        Node newNode = new Node(book);
        if (head == null) {
            head = newNode;
        } else {
            Node current = head;
            while (current.getNext() != null) {
                current = current.getNext();
            }
            current.setNext(newNode);
        }
        length++;
    }

    // Remove a book from the linked list
    public void removeBook(Book book) {
        if (head == null) {
            return;
        }
        if (head.getBook().equals(book)) {
            head = head.getNext();
            length--;
            return;
        }
        Node current = head;
        while (current.getNext() != null && !current.getNext().getBook().equals(book)) {
            current = current.getNext();
        }
        if (current.getNext() != null) {
            current.setNext(current.getNext().getNext());
            length--;
        }
    }

    // Find a book in the linked list
    public Book findBook(String name) {
        if (head == null) {
            return null;
        }
        Node current = head;
        while (current != null) {
            if (current.getBook().getName().equals(name)) {
                return current.getBook();
            }
            current = current.getNext();
        }
        return null;
    }

    // Print the linked list
    public void printLinkedList() {
        Node current = head;
        while (current != null) {
            System.out.println(current.getBook().getName());
            current = current.getNext();
        }
    }
}

示例1：添加书籍，删除书籍，打印链表

// 创建一个成员为头节点为空链表的单链表对象
LinkedList bookList = new LinkedList();

// 添加3本书
Book book1 = new Book("Java从入门到精通", "张三", "清华大学出版社", "978-7-302-39108-1");
Book book2 = new Book("Java编程思想", "Bruce Eckel", "机械工业出版社", "978-7-111-52404-9");
Book book3 = new Book("Java并发编程实战", "Brian Goetz", "机械工业出版社", "978-7-111-39728-0");
bookList.addBook(book1);
bookList.addBook(book2);
bookList.addBook(book3);

// 遍历链表并打印书籍名
bookList.printLinkedList();
// 输出：
// Java从入门到精通
// Java编程思想
// Java并发编程实战

// 删除一本书，并再次打印链表
bookList.removeBook(book2);
bookList.printLinkedList();
// 输出：
// Java从入门到精通
// Java并发编程实战

示例2：查找一本书

// 创建一个成员为头节点为空链表的单链表对象
LinkedList bookList = new LinkedList();

// 添加3本书
Book book1 = new Book("Java从入门到精通", "张三", "清华大学出版社", "978-7-302-39108-1");
Book book2 = new Book("Java编程思想", "Bruce Eckel", "机械工业出版社", "978-7-111-52404-9");
Book book3 = new Book("Java并发编程实战", "Brian Goetz", "机械工业出版社", "978-7-111-39728-0");
bookList.addBook(book1);
bookList.addBook(book2);
bookList.addBook(book3);

// 查找一本书
Book book = bookList.findBook("Java编程思想");
System.out.println(book.getAuthor());
// 输出：Bruce Eckel