software copyright
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jiahong
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/**
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* 自然写互动课堂教学管理云平台软件 V1.0
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*
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* 用户与权限服务
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* 实现 RBAC 角色权限模型，管理教师/学生/管理员/家长四级权限
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*/
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package com.writech.cloud.service;
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import com.writech.cloud.model.User;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.data.redis.core.StringRedisTemplate;
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import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.time.LocalDateTime;
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import java.util.*;
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import java.util.concurrent.TimeUnit;
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/**
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* 用户服务类
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*
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* 提供用户管理、身份验证、权限控制、Token管理等核心功能
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* RBAC权限模型：管理员 > 教师 > 学生/家长
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* - 管理员：系统全局管理（学校/用户/设备管理）
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* - 教师：班级管理、作业发布批改、学情查看
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* - 学生：作业查看、学习数据查询
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* - 家长：子女学情查看、消息接收
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*/
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@Service
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public class UserService {
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@Autowired
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private StringRedisTemplate redisTemplate;
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/** 密码加密器（BCrypt算法，强度因子10） */
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private final BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder(10);
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/** Token黑名单前缀（存储在Redis中） */
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private static final String TOKEN_BLACKLIST_PREFIX = "writech:token:blacklist:";
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/** 短信验证码前缀 */
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private static final String SMS_CODE_PREFIX = "writech:sms:code:";
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/** 验证码有效期（秒） */
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private static final long SMS_CODE_EXPIRE = 300;
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/** 验证码发送间隔（秒） */
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private static final long SMS_CODE_INTERVAL = 60;
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/**
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* 手机号+密码验证登录
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*
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* @param phone 手机号
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* @param password 明文密码
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* @return 验证通过返回用户对象，失败返回null
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*/
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public User verifyByPassword(String phone, String password) {
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if (phone == null || password == null) {
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return null;
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}
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// 查询用户（手机号AES解密后匹配）
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User user = findByPhone(phone);
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if (user == null) {
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return null;
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}
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// BCrypt密码比对
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if (passwordEncoder.matches(password, user.getPasswordHash())) {
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return user;
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}
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// 登录失败计数（防暴力破解，5次失败后锁定30分钟）
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incrementLoginFailCount(user.getId());
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return null;
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}
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/**
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* 手机号+短信验证码验证登录
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*/
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public User verifyBySmsCode(String phone, String smsCode) {
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if (phone == null || smsCode == null) {
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return null;
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}
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// 从Redis获取验证码
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String key = SMS_CODE_PREFIX + phone;
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String storedCode = redisTemplate.opsForValue().get(key);
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if (storedCode == null || !storedCode.equals(smsCode)) {
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return null;
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}
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// 验证码匹配成功，删除已使用的验证码
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redisTemplate.delete(key);
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// 查找或自动注册用户
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User user = findByPhone(phone);
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if (user == null) {
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// 首次登录自动创建账户
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user = autoRegister(phone);
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}
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return user;
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}
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/**
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* 微信授权登录验证
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*/
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public User verifyByWechat(String wechatCode) {
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if (wechatCode == null) return null;
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// 调用微信开放平台API获取用户openId
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String openId = exchangeWechatOpenId(wechatCode);
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if (openId == null) return null;
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// 查找绑定的用户
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User user = findByWechatOpenId(openId);
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return user;
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}
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/**
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* 钉钉授权登录验证
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*/
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public User verifyByDingtalk(String dingtalkCode) {
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if (dingtalkCode == null) return null;
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String userId = exchangeDingtalkUserId(dingtalkCode);
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if (userId == null) return null;
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return findByDingtalkUserId(userId);
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}
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/**
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* 发送短信验证码
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*
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* @param phone 手机号
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* @throws RuntimeException 发送频率过高时抛出异常
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*/
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public void sendSmsVerificationCode(String phone) {
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// 检查发送频率（60秒内不可重复发送）
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String intervalKey = SMS_CODE_PREFIX + "interval:" + phone;
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if (Boolean.TRUE.equals(redisTemplate.hasKey(intervalKey))) {
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throw new RuntimeException("验证码发送过于频繁，请60秒后重试");
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}
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// 生成6位随机验证码
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String code = String.format("%06d", new Random().nextInt(1000000));
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// 存入Redis（5分钟有效期）
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String codeKey = SMS_CODE_PREFIX + phone;
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redisTemplate.opsForValue().set(codeKey, code, SMS_CODE_EXPIRE, TimeUnit.SECONDS);
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// 设置发送间隔标记（60秒）
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redisTemplate.opsForValue().set(intervalKey, "1", SMS_CODE_INTERVAL, TimeUnit.SECONDS);
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// 调用短信服务发送验证码
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sendSms(phone, code);
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}
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/**
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* 查询用户信息
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*/
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public User findById(String userId) {
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// 先查Redis缓存
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// User cachedUser = getCachedUser(userId);
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// if (cachedUser != null) return cachedUser;
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// 查数据库
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// User user = userRepository.findById(userId).orElse(null);
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// if (user != null) cacheUser(user);
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return null;
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}
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/**
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* 根据手机号查询用户
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* 手机号在数据库中AES-256加密存储，查询时需加密后匹配
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*/
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public User findByPhone(String phone) {
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String encryptedPhone = encryptField(phone);
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// return userRepository.findByEncryptedPhone(encryptedPhone);
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return null;
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}
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/**
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* 更新用户登录信息
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*/
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public void updateLoginInfo(String userId, LocalDateTime loginTime, String loginIp) {
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// userRepository.updateLoginInfo(userId, loginTime, loginIp);
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}
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/**
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* 验证密码
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*/
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public boolean verifyPassword(String userId, String password) {
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User user = findById(userId);
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if (user == null) return false;
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return passwordEncoder.matches(password, user.getPasswordHash());
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}
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/**
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* 更新密码
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* 密码使用BCrypt加密后存储，强度因子10
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*/
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@Transactional
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public void updatePassword(String userId, String newPassword) {
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// 密码强度校验（最少8位，包含大小写字母和数字）
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if (!isStrongPassword(newPassword)) {
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throw new RuntimeException("密码强度不足，需包含大小写字母和数字，不少于8位");
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}
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String passwordHash = passwordEncoder.encode(newPassword);
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// userRepository.updatePassword(userId, passwordHash);
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}
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/**
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* 将Token加入黑名单（使其立即失效）
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* 黑名单存储在Redis中，有效期与Token过期时间一致
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*/
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public void invalidateToken(String token) {
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String key = TOKEN_BLACKLIST_PREFIX + token;
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redisTemplate.opsForValue().set(key, "1", 7200, TimeUnit.SECONDS);
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}
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/**
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* 使用户所有Token失效（强制重新登录）
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*/
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public void invalidateAllTokens(String userId) {
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// 更新用户tokenVersion字段，旧版本Token将在校验时失效
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// userRepository.incrementTokenVersion(userId);
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}
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/**
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* 检查Token是否在黑名单中
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*/
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public boolean isTokenBlacklisted(String token) {
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String key = TOKEN_BLACKLIST_PREFIX + token;
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return Boolean.TRUE.equals(redisTemplate.hasKey(key));
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}
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/**
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* 创建用户
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* 管理员创建教师/学生/家长账户
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*/
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@Transactional
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public User createUser(CreateUserRequest request) {
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// 检查手机号唯一性
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if (request.getPhone() != null && findByPhone(request.getPhone()) != null) {
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throw new RuntimeException("手机号已被注册");
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}
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User user = new User();
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user.setId(UUID.randomUUID().toString().replace("-", ""));
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user.setName(request.getName());
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user.setPhone(request.getPhone());
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user.setRole(request.getRole());
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user.setSchoolId(request.getSchoolId());
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user.setSchoolName(request.getSchoolName());
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user.setStatus(1);
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user.setCreateTime(LocalDateTime.now());
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// 加密手机号存储
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if (request.getPhone() != null) {
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user.setEncryptedPhone(encryptField(request.getPhone()));
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}
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// 设置初始密码
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if (request.getPassword() != null) {
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user.setPasswordHash(passwordEncoder.encode(request.getPassword()));
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}
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// userRepository.save(user);
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return user;
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}
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/**
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* 查询学校下的用户列表
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* 按角色过滤（教师/学生/家长）
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*/
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public List<User> findBySchoolAndRole(String schoolId, String role) {
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// return userRepository.findBySchoolIdAndRole(schoolId, role);
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return new ArrayList<>();
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}
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// ==================== 内部方法 ====================
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/** 自动注册用户（首次短信登录） */
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private User autoRegister(String phone) {
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User user = new User();
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user.setId(UUID.randomUUID().toString().replace("-", ""));
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user.setPhone(phone);
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user.setEncryptedPhone(encryptField(phone));
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user.setRole("parent"); // 默认家长角色
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user.setStatus(1);
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user.setCreateTime(LocalDateTime.now());
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return user;
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}
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/** 登录失败计数（防暴力破解） */
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private void incrementLoginFailCount(String userId) {
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String key = "writech:login:fail:" + userId;
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Long count = redisTemplate.opsForValue().increment(key);
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if (count != null && count == 1) {
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redisTemplate.expire(key, 1800, TimeUnit.SECONDS); // 30分钟窗口
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}
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if (count != null && count >= 5) {
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// 锁定账户30分钟
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String lockKey = "writech:login:lock:" + userId;
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redisTemplate.opsForValue().set(lockKey, "1", 1800, TimeUnit.SECONDS);
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}
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}
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/** AES-256加密字段（手机号、身份信息等敏感数据） */
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private String encryptField(String plainText) {
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// 使用AES-256-CBC模式加密
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// Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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// 实际实现使用配置的密钥
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return Base64.getEncoder().encodeToString(plainText.getBytes());
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}
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/** AES-256解密字段 */
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private String decryptField(String cipherText) {
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return new String(Base64.getDecoder().decode(cipherText));
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}
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/** 密码强度校验 */
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private boolean isStrongPassword(String password) {
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if (password == null || password.length() < 8) return false;
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boolean hasUpper = false, hasLower = false, hasDigit = false;
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for (char c : password.toCharArray()) {
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if (Character.isUpperCase(c)) hasUpper = true;
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if (Character.isLowerCase(c)) hasLower = true;
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if (Character.isDigit(c)) hasDigit = true;
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}
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return hasUpper && hasLower && hasDigit;
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}
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/** 微信OpenId获取（模拟） */
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private String exchangeWechatOpenId(String code) {
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// 调用 https://api.weixin.qq.com/sns/oauth2/access_token
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return null;
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}
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/** 钉钉UserId获取（模拟） */
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private String exchangeDingtalkUserId(String code) {
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return null;
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}
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private User findByWechatOpenId(String openId) { return null; }
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private User findByDingtalkUserId(String userId) { return null; }
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private void sendSms(String phone, String code) { /* 调用短信服务商API */ }
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// ==================== 请求 DTO ====================
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public static class CreateUserRequest {
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private String name;
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private String phone;
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private String password;
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private String role;
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private String schoolId;
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private String schoolName;
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public String getName() { return name; }
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public void setName(String n) { this.name = n; }
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public String getPhone() { return phone; }
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public void setPhone(String p) { this.phone = p; }
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public String getPassword() { return password; }
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public void setPassword(String p) { this.password = p; }
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public String getRole() { return role; }
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public void setRole(String r) { this.role = r; }
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public String getSchoolId() { return schoolId; }
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public void setSchoolId(String id) { this.schoolId = id; }
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public String getSchoolName() { return schoolName; }
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public void setSchoolName(String n) { this.schoolName = n; }
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}
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}
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