Java制作简单博客评论模块_对象封装与集合综合使用

public class Comment {
    private int id;
    private String author;
    private String content;
    private String createTime;

    public Comment() {}

    public Comment(int id, String author, String content, String createTime) {
        this.id = id;
        this.author = author;
        this.content = content;
        this.createTime = createTime;
    }

    // getter 和 setter 方法
    public int getId() { return id; }
    public void setId(int id) { this.id = id; }

    public String getAuthor() { return author; }
    public void setAuthor(String author) { this.author = author; }

    public String getContent() { return content; }
    public void setContent(String content) { this.content = content; }

    public String getCreateTime() { return createTime; }
    public void setCreateTime(String createTime) { this.createTime = createTime; }

    @Override
    public String toString() {
        return "Comment{" +
                "id=" + id +
                ", author='" + author + '\'' +
                ", content='" + content + '\'' +
                ", createTime='" + createTime + '\'' +
                '}';
    }
}

import java.util.ArrayList;
import java.util.List;

public class BlogCommentManager {
    private List<Comment> comments;

    public BlogCommentManager() {
        comments = new ArrayList<>();
    }

    // 添加评论
    public void addComment(Comment comment) {
        comments.add(comment);
        System.out.println("评论已添加：" + comment.getAuthor());
    }

    // 删除评论（按ID）
    public boolean deleteCommentById(int id) {
        for (Comment c : comments) {
            if (c.getId() == id) {
                comments.remove(c);
                System.out.println("已删除ID为 " + id + " 的评论");
                return true;
            }
        }
        System.out.println("未找到ID为 " + id + " 的评论");
        return false;
    }

    // 显示所有评论
    public void displayAllComments() {
        if (comments.isEmpty()) {
            System.out.println("暂无评论");
            return;
        }
        System.out.println("=== 所有评论 ===");
        for (Comment c : comments) {
            System.out.println(c);
        }
    }

    // 根据作者查找评论
    public void findCommentsByAuthor(String author) {
        System.out.println("查找作者为 '" + author + "' 的评论：");
        boolean found = false;
        for (Comment c : comments) {
            if (c.getAuthor().equals(author)) {
                System.out.println(c);
                found = true;
            }
        }
        if (!found) {
            System.out.println("未找到该作者的评论");
        }
    }
}

public class Main {
    public static void main(String[] args) {
        BlogCommentManager manager = new BlogCommentManager();

        // 创建几条评论
        Comment c1 = new Comment(1, "张三", "这篇文章写得很好！", "2025-04-01 10:00");
        Comment c2 = new Comment(2, "李四", "学习到了新知识，谢谢分享", "2025-04-01 10:30");
        Comment c3 = new Comment(3, "张三", "下次希望能更详细一点", "2025-04-01 11:00");

        // 添加评论
        manager.addComment(c1);
        manager.addComment(c2);
        manager.addComment(c3);

        // 显示全部
        manager.displayAllComments();

        // 按作者查询
        manager.findCommentsByAuthor("张三");

        // 删除一条评论
        manager.deleteCommentById(2);

        // 再次查看
        manager.displayAllComments();
    }
}