<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;
import static com.hmdp.utils.RedisConstants.LOGIN_USER_TTL;

public class RefreshTokenInterceptor implements HandlerInterceptor {

    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.獲取請(qǐng)求頭中的token
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)) {
            return true;
        }
        // 2.基于TOKEN獲取redis中的用戶
        String key  = LOGIN_USER_KEY + token;
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);
        // 3.判斷用戶是否存在
        if (userMap.isEmpty()) {
            return true;
        }
        // 5.將查詢到的hash數(shù)據(jù)轉(zhuǎn)為UserDTO
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        // 6.存在，保存用戶信息到 ThreadLocal
        UserHolder.saveUser(userDTO);
        // 7.刷新token有效期
        stringRedisTemplate.expire(key, LOGIN_USER_TTL, TimeUnit.MINUTES);
        // 8.放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 移除用戶
        UserHolder.removeUser();
    }
}

package com.hmdp.utils;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.判斷是否需要攔截（ThreadLocal中是否有用戶）
        if (UserHolder.getUser() == null) {
            // 沒有，需要攔截，設(shè)置狀態(tài)碼
            response.setStatus(401);
            // 攔截
            return false;
        }
        // 有用戶，則放行
        return true;
    }
}

package com.hmdp.config;

import com.hmdp.utils.LoginInterceptor;
import com.hmdp.utils.RefreshTokenInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.annotation.Resource;

@Configuration
public class MvcConfig implements WebMvcConfigurer {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 登錄攔截器
        registry.addInterceptor(new LoginInterceptor())
                .excludePathPatterns(
                        "/shop/**",
                        "/voucher/**",
                        "/shop-type/**",
                        "/upload/**",
                        "/blog/hot",
                        "/user/code",
                        "/user/login"
                ).order(1);
        // token刷新的攔截器
        registry.addInterceptor(new RefreshTokenInterceptor(stringRedisTemplate)).addPathPatterns("/**").order(0);
    }
}

@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 1.校驗(yàn)手機(jī)號(hào)
        if (RegexUtils.isPhoneInvalid(phone)) {
            // 2.如果不符合，返回錯(cuò)誤信息
            return Result.fail("手機(jī)號(hào)格式錯(cuò)誤！");
        }
        // 3.符合，生成驗(yàn)證碼
        String code = RandomUtil.randomNumbers(6);

        // 4.保存驗(yàn)證碼到 redis
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);

        // 5.發(fā)送驗(yàn)證碼
        log.debug("發(fā)送短信驗(yàn)證碼成功，驗(yàn)證碼：{}", code);
        // 返回ok
        return Result.ok();
    }
}

@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        // 1.校驗(yàn)手機(jī)號(hào)
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            // 2.如果不符合，返回錯(cuò)誤信息
            return Result.fail("手機(jī)號(hào)格式錯(cuò)誤！");
        }
        // 3.從redis獲取驗(yàn)證碼并校驗(yàn)
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if (cacheCode == null || !cacheCode.equals(code)) {
            // 不一致，報(bào)錯(cuò)
            return Result.fail("驗(yàn)證碼錯(cuò)誤");
        }

        // 4.一致，根據(jù)手機(jī)號(hào)查詢用戶 select * from tb_user where phone = ?
        User user = query().eq("phone", phone).one();

        // 5.判斷用戶是否存在
        if (user == null) {
            // 6.不存在，創(chuàng)建新用戶并保存
            user = createUserWithPhone(phone);
        }

        // 7.保存用戶信息到 redis中
        // 7.1.隨機(jī)生成token，作為登錄令牌
        String token = UUID.randomUUID().toString(true);
        // 7.2.將User對(duì)象轉(zhuǎn)為HashMap存儲(chǔ)
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
        // 7.3.存儲(chǔ)
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
        // 7.4.設(shè)置token有效期
        stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);

        // 8.返回token
        return Result.ok(token);
    }
    
    private User createUserWithPhone(String phone) {
        // 1.創(chuàng)建用戶
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        // 2.保存用戶
        save(user);
        return user;
    }
    
}