帮我用Java写一个简单的图书功能，要求：统计最受欢迎的水和借阅最少的书

好的，我可以帮你实现这个功能。首先，我们需要定义一个Book类来表示图书，包含书名、作者、出版社、借阅次数等属性。接下来，我们可以使用一个HashMap来存储图书信息，其中键为书名，值为Book对象。

以下是代码示例：

import java.util.*;

public class Book {
    private String title;
    private String author;
    private String publisher;
    private int borrowCount;

    public Book(String title, String author, String publisher) {
        this.title = title;
        this.author = author;
        this.publisher = publisher;
        this.borrowCount = 0;
    }

    // getter 和 setter 方法省略

    // 借阅次数加1
    public void borrow() {
        this.borrowCount++;
    }
}

public class Library {
    private HashMap<String, Book> bookMap;

    public Library() {
        bookMap = new HashMap<>();
    }

    // 添加图书
    public void addBook(String title, String author, String publisher) {
        Book book = new Book(title, author, publisher);
        bookMap.put(title, book);
    }

    // 借阅图书
    public void borrowBook(String title) {
        Book book = bookMap.get(title);
        if (book != null) {
            book.borrow();
        }
    }

    // 统计最受欢迎的书
    public String getMostPopularBook() {
        String mostPopularBook = "";
        int maxBorrowCount = -1;
        for (Map.Entry<String, Book> entry : bookMap.entrySet()) {
            Book book = entry.getValue();
            if (book.getBorrowCount() > maxBorrowCount) {
                mostPopularBook = book.getTitle();
                maxBorrowCount = book.getBorrowCount();
            }
        }
        return mostPopularBook;
    }

    // 统计借阅最少的书
    public String getLeastBorrowedBook() {
        String leastBorrowedBook = "";
        int minBorrowCount = Integer.MAX_VALUE;
        for (Map.Entry<String, Book> entry : bookMap.entrySet()) {
            Book book = entry.getValue();
            if (book.getBorrowCount() < minBorrowCount) {
                leastBorrowedBook = book.getTitle();
                minBorrowCount = book.getBorrowCount();
            }
        }
        return leastBorrowedBook;
    }
}

使用示例：

public static void main(String[] args) {
    Library library = new Library();
    library.addBook("Java编程思想", "Bruce Eckel", "机械工业出版社");
    library.addBook("深入浅出设计模式", "程杰", "电子工业出版社");
    library.addBook("算法导论", "Thomas H. Cormen", "机械工业出版社");

    library.borrowBook("Java编程思想");
    library.borrowBook("Java编程思想");
    library.borrowBook("深入浅出设计模式");

    System.out.println("最受欢迎的书：" + library.getMostPopularBook());
    System.out.println("借阅最少的书：" + library.getLeastBorrowedBook());
}

输出结果：

最受欢迎的书：Java编程思想
借阅最少的书：算法导论