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目录
一.短信登录
1.1 导入项目
1.2 Session 实现短信登录
1.3 集群的 Session 共享问题
1.4 基于 Redis 实现共享 Session 登录
一.短信登录
1.1 导入项目
数据库准备
-- 创建用户表
CREATE TABLE `user` (`id` BIGINT AUTO_INCREMENT PRIMARY KEY COMMENT '用户ID',`phone` VARCHAR(20) NOT NULL UNIQUE COMMENT '手机号',`nick_name` VARCHAR(50) COMMENT '昵称',`create_time` DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间'
) COMMENT='用户表';
导入项目
cd nginx目录
start nginx.exe
1.2 Session 实现短信登录
发送验证码
@Override
public Result sendCode(String phone, HttpSession session) {// 校验手机号格式是否正确if (RegexUtils.isPhoneInvalid(phone)) {return Result.fail("手机号格式不正确!");}// 生成6位随机数字验证码String code = RandomUtil.randomNumbers(6);// 将验证码保存到session中session.setAttribute("code", code);// 日志记录验证码（实际开发中应发送短信）log.info("验证码为: " + code);return Result.ok();
}
登录功能
@Override
public Result login(LoginFormDTO loginForm, HttpSession session) {// 获取手机号String phone = loginForm.getPhone();// 校验手机号格式if (RegexUtils.isPhoneInvalid(phone)) {return Result.fail("手机号格式错误!");}// 从session中获取验证码Object cacheCode = session.getAttribute("code");String code = loginForm.getCode();// 校验验证码是否正确if (code == null || !cacheCode.toString().equals(code)) {return Result.fail("验证码错误!");}// 根据手机号查询用户User user = query().eq("phone", phone).one();if (user == null) {// 如果用户不存在，则自动注册user = new User();user.setPhone(phone);user.setNickName("user_" + RandomUtil.randomString(10));save(user);}// 将用户信息存入sessionsession.setAttribute("user", user);return Result.ok();
}
拦截器 LoginInterceptor
public class LoginInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {// 获取sessionHttpSession session = request.getSession();// 从session中获取用户信息Object user = session.getAttribute("user");// 判断用户是否存在if (user == null) {// 用户未登录，返回401状态码response.setStatus(401);response.getWriter().write("用户未登录!");return false;}// 用户已登录，放行return true;}
}
在MvcConfig加上拦截器
@Configuration
public class MvcConfig implements WebMvcConfigurer {@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new LoginInterceptor()).excludePathPatterns("/user/code", // 验证码接口"/user/login", // 登录接口"/blog/hot", // 热门博客"/shop/**", // 商户信息"/shop-type/**", // 商户类型"/upload/**", // 文件上传"/voucher/**" // 优惠券);}
}
1.3 集群的 Session 共享问题
多台Tomcat不共享session存储空间，当请求切换到不同的tomcat服务时导致数据丢失的问题
所以我们把数据存入Redis，集群的Redis可以替代session
1.4 基于 Redis 实现共享 Session 登录
我们应该选择String类型存验证码即可，value:验证码，但是key要区分开来
选择Hash存储用户信息，因为每个字段独立，比较好去DRUD,内存占用少，key用token即可(随机字符串)
之前的session的话，tomcat会自动把session的Id存入Cookie,每次请求都会携带Cookie,所以我们需要手动把token返回给客户端，每次请求客户端都会携带着token
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {@Autowiredprivate StringRedisTemplate stringRedisTemplate;@Overridepublic Result sendCode(String phone, HttpSession session) {// 校验手机号格式是否正确if (RegexUtils.isPhoneInvalid(phone)) {return Result.fail("手机号格式不正确!");}// 生成6位随机数字验证码String code = RandomUtil.randomNumbers(6);// 将验证码保存到Redis中，设置过期时间为2分钟stringRedisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY + phone, code, RedisConstants.LOGIN_CODE_TTL, TimeUnit.MINUTES);// 日志记录验证码（实际开发中应发送短信）log.info("验证码为: " + code);return Result.ok();}
}@Override
public Result login(LoginFormDTO loginForm, HttpSession session) {// 获取手机号String phone = loginForm.getPhone();// 校验手机号格式if (RegexUtils.isPhoneInvalid(phone)) {return Result.fail("手机号格式错误!");}// 从Redis中获取验证码String cacheCode = stringRedisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY + phone);String code = loginForm.getCode();// 校验验证码是否正确if (cacheCode == null || !cacheCode.equals(code)) {return Result.fail("验证码错误!");}// 根据手机号查询用户User user = query().eq("phone", phone).one();if (user == null) {// 如果用户不存在，则自动注册user = new User();user.setPhone(phone);user.setNickName("user_" + RandomUtil.randomString(10));save(user);}// 生成唯一的TokenString token = UUID.randomUUID().toString(true);// 将用户信息转换为UserDTOUserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);// 将用户信息以Hash类型存储到Redis中，设置过期时间为36000分钟stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY + token, BeanUtil.beanToMap(userDTO));stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY + token, RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);// 返回Tokenreturn Result.ok(token);
}
MvcConfig注入stringRedisTemplate,然后传给LoginInterceptor,因为LoginInterceptor不是bean不能用spring注入其他bean
@Configuration
public class MvcConfig implements WebMvcConfigurer {@Resourceprivate StringRedisTemplate stringRedisTemplate;@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new LoginInterceptor(stringRedisTemplate)).excludePathPatterns("/user/code","/user/login","/blog/hot","/shop/**","/shop-type/**","/upload/**","/voucher/**");}
}LoginInterceptor
public class LoginInterceptor implements HandlerInterceptor{private final StringRedisTemplate stringRedisTemplate;public LoginInterceptor(StringRedisTemplate stringRedisTemplate){this.stringRedisTemplate = stringRedisTemplate;}@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)){//不存在，拦截 设置响应状态吗为401（未授权）response.setStatus(401);return false;}//2.基于token获取redis中用户String key=RedisConstants.LOGIN_USER_KEY + token;Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);//3.判断用户是否存在if (userMap.isEmpty()){//4.不存在则拦截，设置响应状态吗为401（未授权）response.setStatus(401);return false;}//5.将查询到的Hash数据转化为UserDTO对象UserDTO userDTO=new UserDTO();BeanUtil.fillBeanWithMap(userMap,userDTO, false);//6.保存用户信息到ThreadLocalUserHolder.saveUser(userDTO);//7.更新token的有效时间，只要用户还在访问我们就需要更新token的存活时间stringRedisTemplate.expire(key, RedisConstants.LOGIN_USER_TTL, TimeUnit.SECONDS);//8.放行return true;}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {//销毁，以免内存泄漏UserHolder.removeUser();}
}用户请求进去拦截器，我们试着去获取请求头内的token，根据token去查询用户信息，判断是否拦截，保存在ThreadLocal,刷新token的有效期
但是，这个拦截器是拦截需要登录之后才需要进行请求的路径，那我如果一直在访问的是不需要拦截的页面的话，我还是会过期？这就不合理。所以我们需要在这个拦截器前面再加个拦截器，然后在新增拦截器上进行保存ThreadLocal和刷新有效期，不理解其他
其实就是对之前的拦截器进行功能拆分
MvcConfig
@Configuration
public class MvcConfig implements WebMvcConfigurer {@Resourceprivate StringRedisTemplate stringRedisTemplate;@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new LoginInterceptor()).excludePathPatterns("/user/code","/user/login","/blog/hot","/shop/**","/shop-type/**","/upload/**","/voucher/**").order(1);//RefreshTokenInterceptor 先于 LoginInterceptor 执行registry.addInterceptor(new RefreshTokenInterceptor(stringRedisTemplate)).order(0);//默认拦截所有请求}}
RefreshTokenInterceptor
public class RefreshTokenInterceptor implements HandlerInterceptor {private final StringRedisTemplate stringRedisTemplate;public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {this.stringRedisTemplate = stringRedisTemplate;}@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {// 从请求头中获取TokenString token = request.getHeader("authorization");if (StrUtil.isBlank(token)) {// 如果Token为空，直接放行return true;}// 构造Redis中的KeyString key = RedisConstants.LOGIN_USER_KEY + token;// 从Redis中获取用户信息Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);if (userMap.isEmpty()) {// 如果用户信息为空，直接放行return true;}// 将用户信息转换为UserDTO对象UserDTO userDTO = new UserDTO();BeanUtil.fillBeanWithMap(userMap, userDTO, false);// 将用户信息保存到ThreadLocal中UserHolder.saveUser(userDTO);// 刷新Token的有效期stringRedisTemplate.expire(key, RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);return true;}
}
LoginInterceptor
public class LoginInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {// 从ThreadLocal中获取用户信息UserDTO user = UserHolder.getUser();if (user == null) {// 如果用户未登录，返回401状态码response.setStatus(401);response.getWriter().write```