//图书实体类
public class Book {
    private String id;                  // 图书ID
    private String title;               // 标题
    private String author;              // 作者
    private String publisher;           // 出版社
    private int publicationYear;        // 出版年份
    private String category;            // 类别
    private boolean isAvailable;        // 是否可借阅
    private String borrowDate;          // 借阅日期（临时存储，用于显示）
    private String dueDate;             // 应还日期（临时存储，用于显示）

    //构造方法
    public Book(String id, String title, String author, String publisher,
                int publicationYear, String category, boolean isAvailable) {
        this.id = id;
        this.title = title;
        this.author = author;
        this.publisher = publisher;
        this.publicationYear = publicationYear;
        this.category = category;
        this.isAvailable = isAvailable;
        this.borrowDate = "";
        this.dueDate = "";
    }

    public String getId() {
        return id;
    }

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public String getPublisher() {
        return publisher;
    }

    public int getPublicationYear() {
        return publicationYear;
    }

    public String getCategory() {
        return category;
    }

    public boolean isAvailable() {
        return isAvailable;
    }

    public void setAvailable(boolean available) {
        isAvailable = available;
    }

    public String getBorrowDate() {
        return borrowDate;
    }

    public void setBorrowDate(String borrowDate) {
        this.borrowDate = borrowDate;
    }

    public String getDueDate() {
        return dueDate;
    }

    public void setDueDate(String dueDate) {
        this.dueDate = dueDate;
    }
}