Java里如何开发简易任务管理工具_任务管理工具项目实战解析

public class Task {
    private int id;
    private String title;
    private String description;
    private String dueDate;
    private boolean completed;
<pre class='brush:java;toolbar:false;'>public Task(int id, String title, String description, String dueDate) {
    this.id = id;
    this.title = title;
    this.description = description;
    this.dueDate = dueDate;
    this.completed = false;
}

// Getter 和 Setter 方法
public int getId() { return id; }
public String getTitle() { return title; }
public String getDescription() { return description; }
public String getDueDate() { return dueDate; }
public boolean isCompleted() { return completed; }

public void setCompleted(boolean completed) {
    this.completed = completed;
}

@Override
public String toString() {
    return "ID: " + id + " | " + title + " | " + description +
           " | 截止: " + dueDate + " | 状态: " + (completed ? "已完成" : "未完成");
}

import java.util.ArrayList;
import java.util.Scanner;
<p>public class TaskManager {
private ArrayList<Task> tasks;
private int nextId;</p><pre class='brush:java;toolbar:false;'>public TaskManager() {
    tasks = new ArrayList<>();
    nextId = 1;
}

public void addTask(String title, String description, String dueDate) {
    Task task = new Task(nextId++, title, description, dueDate);
    tasks.add(task);
    System.out.println("任务已添加，ID: " + task.getId());
}

public void viewTasks() {
    if (tasks.isEmpty()) {
        System.out.println("暂无任务");
        return;
    }
    for (Task task : tasks) {
        System.out.println(task);
    }
}

public void markTaskAsCompleted(int id) {
    for (Task task : tasks) {
        if (task.getId() == id) {
            task.setCompleted(true);
            System.out.println("任务 '" + task.getTitle() + "' 已标记为完成");
            return;
        }
    }
    System.out.println("未找到ID为 " + id + " 的任务");
}

public void deleteTask(int id) {
    boolean removed = tasks.removeIf(task -> task.getId() == id);
    if (removed) {
        System.out.println("任务已删除");
    } else {
        System.out.println("未找到该任务");
    }
}

public class Main {
    public static void main(String[] args) {
        TaskManager manager = new TaskManager();
        Scanner scanner = new Scanner(System.in);
        boolean running = true;
<pre class='brush:java;toolbar:false;'>    while (running) {
        System.out.println("\n--- 任务管理系统 ---");
        System.out.println("1. 添加任务");
        System.out.println("2. 查看所有任务");
        System.out.println("3. 标记任务为完成");
        System.out.println("4. 删除任务");
        System.out.println("5. 退出");
        System.out.print("请选择操作: ");

        int choice = scanner.nextInt();
        scanner.nextLine(); // 消费换行符

        switch (choice) {
            case 1:
                System.out.print("请输入任务标题: ");
                String title = scanner.nextLine();
                System.out.print("请输入任务描述: ");
                String desc = scanner.nextLine();
                System.out.print("请输入截止日期 (如 2025-04-01): ");
                String date = scanner.nextLine();
                manager.addTask(title, desc, date);
                break;

            case 2:
                manager.viewTasks();
                break;

            case 3:
                System.out.print("请输入要完成的任务ID: ");
                int completeId = scanner.nextInt();
                manager.markTaskAsCompleted(completeId);
                break;

            case 4:
                System.out.print("请输入要删除的任务ID: ");
                int deleteId = scanner.nextInt();
                manager.deleteTask(deleteId);
                break;

            case 5:
                running = false;
                System.out.println("再见！");
                break;

            default:
                System.out.println("无效选择，请重试");
        }
    }
    scanner.close();
}