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java如何实现手机验证码

2026-03-17 20:01:58Java

实现手机验证码功能

生成随机验证码

使用Java的Random类或SecureRandom类生成随机数字验证码，通常为4-6位数字。

import java.util.Random;

public class VerificationCodeGenerator {
    public static String generateCode(int length) {
        Random random = new Random();
        StringBuilder code = new StringBuilder();
        for (int i = 0; i < length; i++) {
            code.append(random.nextInt(10));
        }
        return code.toString();
    }
}

存储验证码

将生成的验证码与手机号关联存储，可使用缓存如Redis，设置合理的过期时间（如5分钟）。

import redis.clients.jedis.Jedis;

public class CodeStorage {
    private static final int EXPIRE_TIME = 300; // 5分钟

    public static void storeCode(String phone, String code) {
        try (Jedis jedis = new Jedis("localhost")) {
            jedis.setex(phone, EXPIRE_TIME, code);
        }
    }
}

发送短信验证码

集成短信服务商API（如阿里云、腾讯云短信服务），通过HTTP请求发送验证码短信。

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

public class SmsSender {
    public static void sendSms(String phone, String code) {
        try (CloseableHttpClient client = HttpClients.createDefault()) {
            HttpPost post = new HttpPost("https://sms.api.url");
            post.setHeader("Content-Type", "application/json");

            String json = String.format("{\"phone\":\"%s\",\"code\":\"%s\"}", phone, code);
            post.setEntity(new StringEntity(json));

            HttpResponse response = client.execute(post);
            // 处理响应结果
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

验证码校验

用户提交验证码后，从缓存中取出存储的验证码进行比对。

import redis.clients.jedis.Jedis;

public class CodeVerifier {
    public static boolean verifyCode(String phone, String inputCode) {
        try (Jedis jedis = new Jedis("localhost")) {
            String storedCode = jedis.get(phone);
            return inputCode != null && inputCode.equals(storedCode);
        }
    }
}

完整流程示例

将以上组件整合实现完整验证码流程。

java如何实现手机验证码

public class SmsVerificationService {
    public void sendVerificationCode(String phone) {
        String code = VerificationCodeGenerator.generateCode(6);
        CodeStorage.storeCode(phone, code);
        SmsSender.sendSms(phone, code);
    }

    public boolean verify(String phone, String code) {
        return CodeVerifier.verifyCode(phone, code);
    }
}