Java开发日程管理器实战教程

public class Event {
    private String title;
    private LocalDateTime dateTime;
    private String description;
public Event(String title, LocalDateTime dateTime, String description) {
    this.title = title;
    this.dateTime = dateTime;
    this.description = description;
}

// Getter方法（可生成setter根据需要）
public String getTitle() { return title; }
public LocalDateTime getDateTime() { return dateTime; }
public String getDescription() { return description; }

@Override
public String toString() {
    return "[" + dateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm")) 
           + "] " + title + " - " + description;
}
}

public class ScheduleManager {
    private List events = new ArrayList<>();
public void addEvent(Event event) {
    events.add(event);
    events.sort((e1, e2) -> e1.getDateTime().compareTo(e2.getDateTime())); // 自动排序
}

public void listAllEvents() {
    if (events.isEmpty()) {
        System.out.println("当前没有日程安排。");
        return;
    }
    for (int i = 0; i < events.size(); i++) {
        System.out.println((i+1) + ". " + events.get(i));
    }
}

public void deleteEvent(int index) {
    if (index >= 1 && index <= events.size()) {
        events.remove(index - 1);
        System.out.println("已删除第" + index + "项日程。");
    } else {
        System.out.println("无效的序号！");
    }
}

public void findEventsByDate(LocalDate date) {
    List<Event> filtered = events.stream()
        .filter(e -> e.getDateTime().toLocalDate().equals(date))
        .collect(Collectors.toList());

    if (filtered.isEmpty()) {
        System.out.println("该日期无日程安排。");
    } else {
        System.out.println("【" + date + " 的日程】");
        for (Event e : filtered) {
            System.out.println("- " + e);
        }
    }
}
}

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        ScheduleManager manager = new ScheduleManager();
    while (true) {
        System.out.println("\n--- 日程管理器 ---");
        System.out.println("1. 添加日程  2. 查看全部  3. 删除日程  4. 查询某日  5. 退出");
        System.out.print("请选择操作：");
        int choice = sc.nextInt();
        sc.nextLine(); // 消费换行

        switch (choice) {
            case 1:
                System.out.print("标题："); String t = sc.nextLine();
                System.out.print("时间(yyyy-MM-dd HH:mm)："); 
                LocalDateTime dt = LocalDateTime.parse(sc.nextLine(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm"));
                System.out.print("描述："); String d = sc.nextLine();
                manager.addEvent(new Event(t, dt, d));
                System.out.println("添加成功！");
                break;
            case 2:
                manager.listAllEvents();
                break;
            case 3:
                manager.listAllEvents();
                System.out.print("请输入要删除的序号：");
                int idx = sc.nextInt();
                manager.deleteEvent(idx);
                break;
            case 4:
                System.out.print("输入日期(yyyy-MM-dd)：");
                LocalDate date = LocalDate.parse(sc.nextLine());
                manager.findEventsByDate(date);
                break;
            case 5:
                System.out.println("再见！");
                sc.close();
                return;
            default:
                System.out.println("无效选择！");
        }
    }
}
}