Java联系人分组管理实战教程

public class Contact {
    private String name;
    private String phone;
    private String email;
public Contact(String name, String phone, String email) {
    this.name = name;
    this.phone = phone;
    this.email = email;
}

// Getter 和 Setter 方法
public String getName() { return name; }
public void setName(String name) { this.name = name; }

public String getPhone() { return phone; }
public void setPhone(String phone) { this.phone = phone; }

public String getEmail() { return email; }
public void setEmail(String email) { this.email = email; }

@Override
public String toString() {
    return "姓名：" + name + " | 电话：" + phone + " | 邮箱：" + email;
}
}

import java.util.ArrayList;
public class ContactGroup {
private String groupName;
private ArrayList contacts;
public ContactGroup(String groupName) {
    this.groupName = groupName;
    this.contacts = new ArrayList<>();
}

public void addContact(Contact contact) {
    contacts.add(contact);
}

public boolean removeContact(String name) {
    return contacts.removeIf(contact -> contact.getName().equals(name));
}

public Contact findContactByName(String name) {
    for (Contact c : contacts) {
        if (c.getName().equals(name)) {
            return c;
        }
    }
    return null;
}

public void displayContacts() {
    System.out.println("【" + groupName + "】分组中的联系人：");
    if (contacts.isEmpty()) {
        System.out.println("  （空）");
    } else {
        for (Contact c : contacts) {
            System.out.println("  " + c);
        }
    }
}

public String getGroupName() {
    return groupName;
}
}

import java.util.ArrayList;
import java.util.Scanner;
public class ContactManager {
private ArrayList groups;
private Scanner scanner;
public ContactManager() {
    this.groups = new ArrayList<>();
    this.scanner = new Scanner(System.in);
}

public void createGroup(String name) {
    groups.add(new ContactGroup(name));
    System.out.println("✅ 分组【" + name + "】创建成功！");
}

public ContactGroup findGroup(String name) {
    for (ContactGroup group : groups) {
        if (group.getGroupName().equals(name)) {
            return group;
        }
    }
    return null;
}

public void addContactToGroup() {
    System.out.print("请输入分组名：");
    String groupName = scanner.nextLine();
    ContactGroup group = findGroup(groupName);

    if (group == null) {
        System.out.println("❌ 找不到该分组，是否创建？(y/n)");
        if (scanner.nextLine().equalsIgnoreCase("y")) {
            group = new ContactGroup(groupName);
            groups.add(group);
            System.out.println("✅ 已创建新分组【" + groupName + "】");
        } else {
            return;
        }
    }

    System.out.print("姓名："); String name = scanner.nextLine();
    System.out.print("电话："); String phone = scanner.nextLine();
    System.out.print("邮箱："); String email = scanner.nextLine();

    Contact contact = new Contact(name, phone, email);
    group.addContact(contact);
    System.out.println("✅ 联系人已添加到【" + groupName + "】");
}

public void displayAllGroups() {
    if (groups.isEmpty()) {
        System.out.println("? 当前没有分组。");
        return;
    }
    for (ContactGroup group : groups) {
        group.displayContacts();
        System.out.println();
    }
}

public void searchContact() {
    System.out.print("请输入要查找的姓名：");
    String name = scanner.nextLine();
    boolean found = false;

    for (ContactGroup group : groups) {
        Contact contact = group.findContactByName(name);
        if (contact != null) {
            System.out.println("? 在【" + group.getGroupName() + "】中找到：");
            System.out.println("  " + contact);
            found = true;
        }
    }
    if (!found) {
        System.out.println("❌ 未找到该联系人。");
    }
}

public void run() {
    System.out.println("? 欢迎使用联系人分组管理系统！");
    while (true) {
        System.out.println("\n--- 功能菜单 ---");
        System.out.println("1. 创建分组");
        System.out.println("2. 添加联系人");
        System.out.println("3. 查看所有联系人");
        System.out.println("4. 搜索联系人");
        System.out.println("5. 退出");
        System.out.print("请选择操作：");

        String choice = scanner.nextLine();
        switch (choice) {
            case "1":
                System.out.print("输入分组名称：");
                createGroup(scanner.nextLine());
                break;
            case "2":
                addContactToGroup();
                break;
            case "3":
                displayAllGroups();
                break;
            case "4":
                searchContact();
                break;
            case "5":
                System.out.println("? 系统已退出，再见！");
                return;
            default:
                System.out.println("❌ 无效选择，请重试。");
        }
    }
}
}

public class Main {
    public static void main(String[] args) {
        ContactManager manager = new ContactManager();
        manager.run();
    }
}