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来源#xff1a;黑马教程 使用Redis中BitMap数据结构使用签到功能和连续签到功能 学习产出#xff1a; 解决方案#xff1a;
1. 准备pom环境 dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-b…学习目标
来源黑马教程 使用Redis中BitMap数据结构使用签到功能和连续签到功能 学习产出 解决方案
1. 准备pom环境 dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-data-redis/artifactId/dependencydependencygroupIdorg.apache.commons/groupIdartifactIdcommons-pool2/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependencydependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdscoperuntime/scopeversion5.1.47/version/dependencydependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdoptionaltrue/optional/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactIdscopetest/scope/dependencydependencygroupIdcom.baomidou/groupIdartifactIdmybatis-plus-boot-starter/artifactIdversion3.4.3/version/dependency!--hutool--dependencygroupIdcn.hutool/groupIdartifactIdhutool-all/artifactIdversion5.7.17/version/dependencydependencygroupIdorg.redisson/groupIdartifactIdredisson/artifactIdversion3.23.1/version/dependency2. 配置ThreadLocal和过滤器
public class UserHolder {private static final ThreadLocalUserDTO tl new ThreadLocal();public static void saveUser(UserDTO user){tl.set(user);}public static UserDTO getUser(){return tl.get();}public static void removeUser(){tl.remove();}
}Configuration
public class MvcConfig implements WebMvcConfigurer {Autowiredprivate StringRedisTemplate redis;Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new LoginInterceptor()).excludePathPatterns(/user/code,/user/login,/blog/hot,/shop/**,/shop-type/**,/voucher/**).order(2);registry.addInterceptor(new RefreshTokenInterceptor(redis)).addPathPatterns(/**).order(1);}
}
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Slf4j
public class LoginInterceptor implements HandlerInterceptor {//controller执行之前Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//1.判断是否需要拦截ThreadLocalif (UserHolder.getUser()null) {response.setStatus(401);return false;}//7.放行return true;}//渲染后返回给前台数据前Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {//移除用户避免内存泄露UserHolder.removeUser();}
}
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Slf4j
public class RefreshTokenInterceptor implements HandlerInterceptor {//这个对象不是由spring管理的所以不能用注解自动注入private StringRedisTemplate redis;public RefreshTokenInterceptor(StringRedisTemplate redis) {this.redis redis;}//controller执行之前Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//1.获取请求头中的tokenString token request.getHeader(authorization);if (StrUtil.isBlank(token)) {return true;}//2.基于token获取redis中的用户//通过key取到hash中的map集合数据MapObject, Object userMap redis.opsForHash().entries(login:token: token);//3.判断用户是否存在if (userMap.isEmpty()) {return true;}//5.将查询到的hash数据转为userDto对象UserDTO userDTO BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);//6.存在保存用户信息到ThreadLocal中UserHolder.saveUser(userDTO);//7.刷新token有效期redis.expire(LOGIN_USER_KEY token, 30, TimeUnit.MINUTES);log.info(我是第一个拦截器当前拦截所有请求的用户为线程为{},{},UserHolder.getUser(),Thread.currentThread());//8.放行return true;}3. Controller层负责接收请求和向下分配
RestController
RequestMapping(/user)
public class UserController{Resourceprivate IUserService userService;PostMapping(/sign)public Result sign(){return userService.sign();}
}4. Service层负责业务的处理逻辑签到功能
Service
Slf4j
public class UserServiceImpl extends ServiceImplUserMapper, User implements IUserService {private static final ObjectMapper mapper new ObjectMapper();Resourceprivate StringRedisTemplate redis;Overridepublic Result sign() {//1. 获取当前登录用户IdLong userId UserHolder.getUser().getId();//2.获取日期Redis中的offset偏移量是从0开始算偏移量n代表的这个月的第n1天int offset LocalDateTime.now().getDayOfMonth() - 1;//3.拼接key存入RedisLocalDateTime now LocalDateTime.now();String keySuffix now.format(DateTimeFormatter.ofPattern(:yyyyMM));String key sign: userId keySuffix;//true代表的是存入BitMap中的二进制是1redis.opsForValue().setBit(key, offset, true);return Result.ok();}
}5. Service层实现连续签到功能
java
Service
Slf4j
public class UserServiceImpl extends ServiceImplUserMapper, User implements IUserService {private static final ObjectMapper mapper new ObjectMapper();Resourceprivate StringRedisTemplate redis;Overridepublic Result signCount() {//1.获取当前登录用户Long userId UserHolder.getUser().getId();//2.获取日期LocalDateTime nowTime LocalDateTime.now();//3.拼接keyString keySuffix nowTime.format(DateTimeFormatter.ofPattern(:yyyyMM));String key sign: userId keySuffix;//4.获取今天是第几天int day nowTime.getDayOfMonth();//5.获取本月截至今天为止所有的签到记录返回的是一个十进制数字ListLong result redis.opsForValue().bitField(key,BitFieldSubCommands.create().get(BitFieldSubCommands.BitFieldType.unsigned(day)).valueAt(0));if (result.isEmpty() || result null) {return Result.ok(0);}Long signCount result.get(0);if (signCount null || signCount 0) {return Result.ok(0);}//6.遍历int count0;while (true) {if ((signCount 1) 0) {//不为0跳出循环break;} else {count;signCount signCount 1;}}//7.签到记录返回的十进制数字与1做 与运算return Result.ok(count);}
}
