Java图书推荐系统设计与实现

class Book {
    private String title;
    private String author;
    private String genre;
    private double rating;
    private int year;
<pre class="brush:java;toolbar:false;">public Book(String title, String author, String genre, double rating, int year) {
    this.title = title;
    this.author = author;
    this.genre = genre;
    this.rating = rating;
    this.year = year;
}

// 提供getter方法
public String getTitle() { return title; }
public String getAuthor() { return author; }
public String getGenre() { return genre; }
public double getRating() { return rating; }
public int getYear() { return year; }

@Override
public String toString() {
    return "\"" + title + "\" by " + author + " [" + genre + "] - " + rating + "/5 (" + year + ")";
}

}

import java.util.*;
<p>public class BookRecommender {
private List<book> bookList;</book></p><pre class="brush:java;toolbar:false;">public BookRecommender() {
    bookList = new ArrayList<>();
    // 初始化一些测试数据
    bookList.add(new Book("The Midnight Library", "Matt Haig", "Fiction", 4.2, 2020));
    bookList.add(new Book("Atomic Habits", "James Clear", "Self-Help", 4.8, 2018));
    bookList.add(new Book("Dune", "Frank Herbert", "Sci-Fi", 4.5, 1965));
    bookList.add(new Book("Educated", "Tara Westover", "Memoir", 4.7, 2018));
    bookList.add(new Book("The Psychology of Money", "Morgan Housel", "Finance", 4.6, 2020));
    bookList.add(new Book("Nineteen Eighty-Four", "George Orwell", "Dystopian", 4.4, 1949));
}

// 根据类型和最低评分推荐
public void recommendByGenreAndRating(String genre, double minRating) {
    System.out.println("推荐结果（类型: " + genre + ", 评分 ≥ " + minRating + "）：");
    boolean found = false;
    for (Book book : bookList) {
        if (book.getGenre().equalsIgnoreCase(genre) && book.getRating() >= minRating) {
            System.out.println("✅ " + book);
            found = true;
        }
    }
    if (!found) {
        System.out.println("未找到符合条件的书籍。");
    }
}

// 多条件组合筛选：类型、年份范围、最低评分
public void recommendWithFilters(String genre, int startYear, int endYear, double minRating) {
    System.out.println("高级推荐（类型: " + genre + ", 年份: " + startYear + "-" + endYear + ", 评分 ≥ " + minRating + "）：");
    List<Book> results = new ArrayList<>();
    for (Book book : bookList) {
        if (book.getGenre().equalsIgnoreCase(genre)
                && book.getYear() >= startYear
                && book.getYear() <= endYear
                && book.getRating() >= minRating) {
            results.add(book);
        }
    }
    if (results.isEmpty()) {
        System.out.println("没有匹配的书籍。");
    } else {
        results.forEach(System.out::println);
    }
}

}

public static void main(String[] args) {
    BookRecommender recommender = new BookRecommender();
<pre class="brush:java;toolbar:false;">// 示例1：推荐自我提升类且评分高于4.5的书
recommender.recommendByGenreAndRating("Self-Help", 4.5);

System.out.println(); // 分隔

// 示例2：推荐2010年后出版、评分4.5以上的传记类书籍
recommender.recommendWithFilters("Memoir", 2010, 2025, 4.5);

}