java课设通讯录（完整）

1、命令行运行
2、能建立、修改和增删通讯录
3、能导入导出通讯录
4、能按多种方式进行查询

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Scanner;
import java.io.File;
public class ContactBook {
    // 定义通讯录联系人类
    static class Contact {
        String name; // 联系人姓名
        String phoneNumber; // 联系人电话号码
        String gender;//联系人性别
        String email;//联系人邮箱
        public Contact(String name, String phoneNumber, String gender, String email) {
            this.name = name;
            this.phoneNumber = phoneNumber;
            this.gender = gender;
            this.email = email;
        }

        public String toString() {
            return "姓名：" + name + "\t电话号码：" + phoneNumber + "\t性别" + gender + "\t邮箱" + email;
        }
    }

    public static void main(String[] args) throws IOException {
        ArrayList<Contact> contacts = new ArrayList<>(); // 存放所有联系人信息的ArrayList

        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请选择要进行的操作：");
            System.out.println("1. 添加联系人");
            System.out.println("2. 修改联系人");
            System.out.println("3. 删除联系人");
            System.out.println("4. 查询联系人");
            System.out.println("5. 显示所有联系人");
            System.out.println("6. 导入通讯录");
            System.out.println("7. 导出通讯录");
            System.out.println("0. 退出程序");

            int choice = scanner.nextInt();
            
            switch (choice) {
                case 1:
                    addContact(contacts, scanner);
                    break;

                case 2:
                    modifyContact(contacts, scanner);
                    break;

                case 3:
                    deleteContact(contacts, scanner);
                    break;

                case 4:
                    searchContacts(contacts, scanner);
                    break;

                case 5:
                    showAllContacts(contacts);
                    break;

                case 6:
                    importContacts(contacts, scanner);
                    break;

                case 7:
                    exportContacts(contacts, scanner);
                    break;

                case 0:
                    System.out.println("程序已退出！");
                    return;
                    
                default:
                    System.out.println("输入错误，请重新输入！");
            }
        }
    }

    // 添加联系人
    public static void addContact(ArrayList<Contact> contacts, Scanner scanner) {
        System.out.print("请输入联系人姓名：");
        String name = scanner.next();
        System.out.print("请输入联系人电话号码：");
        String phoneNumber = scanner.next();
        System.out.print("请输入联系人性别：");
        String gender = scanner.next();
        System.out.print("请输入联系人邮箱：");
        String email = scanner.next();
        Contact contact = new Contact(name, phoneNumber,gender,email);
        contacts.add(contact); // 将新的联系人添加到ArrayList中
        System.out.println("添加成功！");
    }

    // 修改联系人
    public static void modifyContact(ArrayList<Contact> contacts, Scanner scanner) {
        if (contacts.size() == 0) {
            System.out.println("通讯录为空，无法修改！");
            return;
        }

        System.out.print("请输入要修改的联系人姓名：");
        String name = scanner.next();

        for (int i = 0; i < contacts.size(); i++) {
            if (name.equals(contacts.get(i).name)) { // 找到要修改的联系人
                System.out.print("请输入新的电话号码：");
                String phoneNumber = scanner.next();
                System.out.print("请输入新的性别：");
                String gender = scanner.next();
                System.out.print("请输入新的邮箱：");
                String email = scanner.next();
                Contact newContact = new Contact(name, phoneNumber,gender,email); // 创建一个新的联系人对象
                contacts.set(i, newContact); // 替换原来的联系人对象
                System.out.println("修改成功！");
                return;
            }
        }

        System.out.println("未找到要修改的联系人！");
    }

    // 删除联系人
    public static void deleteContact(ArrayList<Contact> contacts, Scanner scanner) {
        if (contacts.size() == 0) {
            System.out.println("通讯录为空，无法删除！");
            return;
        }

        System.out.print("请输入要删除的联系人姓名：");
        String name = scanner.next();

        for (int i = 0; i < contacts.size(); i++) {
            if (name.equals(contacts.get(i).name)) { // 找到要删除的联系人
                contacts.remove(i); // 删除该联系人
                System.out.println("删除成功！");
                return;
            }
        }

        System.out.println("未找到要删除的联系人！");
    }

    // 查询联系人
    public static void searchContacts(ArrayList<Contact> contacts, Scanner scanner) {
        if (contacts.size() == 0) {
            System.out.println("通讯录为空，无法查询！");
            return;
        }

        while (true) {
            System.out.println("请选择查询方式：");
            System.out.println("1. 按姓名查询");
            System.out.println("2. 按电话号码查询");
            System.out.println("3. 按邮箱查询");
            int choice = scanner.nextInt();
            
            switch (choice) {
                case 1:
                    searchByName(contacts, scanner);
                    return;

                case 2:
                    searchByPhoneNumber(contacts, scanner);
                    return;
                case 3:
                    searchByemail(contacts, scanner);
                    return;
                default:
                    System.out.println("输入错误，请重新输入！");
            }
        }
    }

    // 按姓名查询联系人
    public static void searchByName(ArrayList<Contact> contacts, Scanner scanner) {
        System.out.print("请输入要查询的联系人姓名：");
        String name = scanner.next();

        for (int i = 0; i < contacts.size(); i++) {
            if (name.equals(contacts.get(i).name)) { // 找到要查询的联系人
                System.out.println(contacts.get(i));
                return;
            }
        }

        System.out.println("未找到该联系人！");
    }

    // 按电话号码查询联系人
    public static void searchByPhoneNumber(ArrayList<Contact> contacts, Scanner scanner) {
        System.out.print("请输入要查询的电话号码：");
        String phoneNumber = scanner.next();

        for (int i = 0; i < contacts.size(); i++) {
            if (phoneNumber.equals(contacts.get(i).phoneNumber)) { // 找到要查询的联系人
                System.out.println(contacts.get(i));
                return;
            }
        }

        System.out.println("未找到该联系人！");
    }
    // 按邮箱查询联系人
    public static void searchByemail(ArrayList<Contact> contacts, Scanner scanner) {
        System.out.print("请输入要查询的联系人邮箱：");
        String email = scanner.next();

        for (int i = 0; i < contacts.size(); i++) {
            if (email.equals(contacts.get(i).email)) { // 找到要查询的联系人
                System.out.println(contacts.get(i));
                return;
            }
        }

        System.out.println("未找到该联系人！");
    }
    // 显示所有联系人
    public static void showAllContacts(ArrayList<Contact> contacts) {
        if (contacts.size() == 0) {
            System.out.println("通讯录为空！");
            return;
        }

        for (Contact contact : contacts) {
            System.out.println(contact);
        }
    }

    // 导入通讯录
    public static void importContacts(ArrayList<Contact> contacts, Scanner scanner) throws IOException {
        System.out.print("请输入导入文件的路径：");
        String filePath = scanner.next();
        
        File file = new File(filePath);
        if (!file.exists()) {
        	file.createNewFile();//如果文件不存在，则创建新文件
        }
        
        BufferedReader reader = new BufferedReader(new FileReader(filePath));
        
        String line;
        
        while ((line = reader.readLine()) != null) { // 逐行读取文件内容
            String[] parts = line.split(","); // 将一行内容按逗号分隔成四部分，分别为姓名 电话号码 性别 邮箱
            String name = parts[0];
            String phoneNumber = parts[1];
            String gender = parts[2];
            String email = parts[3];
            Contact contact = new Contact(name, phoneNumber,gender,email);
            contacts.add(contact); // 将新的联系人添加到ArrayList中
            System.out.print(name + "\t" + phoneNumber + "\t" + gender + "\t" + email);
        }
        
        reader.close();
        
        System.out.println("导入成功！");
    }

    // 导出通讯录
    public static void exportContacts(ArrayList<Contact> contacts, Scanner scanner) throws IOException {
        if (contacts.size() == 0) {
            System.out.println("通讯录为空，无法导出！");
            return;
        }

        System.out.print("请输入导出文件的路径：");
        String filePath = scanner.next();

        File file = new File(filePath);
        if (!file.exists()) {
        	file.createNewFile();
        }
        
        BufferedWriter writer = new BufferedWriter(new FileWriter(filePath));

        for (Contact contact : contacts) {
            writer.write(contact.name + "," + contact.phoneNumber + "," + contact.gender + "," + contact.email); // 将联系人信息按逗号分隔写入文件中
            writer.newLine(); // 换行
        }

        writer.close();

        System.out.println("导出成功！");
    }
}