Redis实战(黑马点评:短信登录)

1.基于Session实现发送短信验证码

UserController:


    /**
     * 发送手机验证码
     */
    @PostMapping("code")
    public Result sendCode(@RequestParam("phone") String phone, HttpSession session) {
        return userService.sedCode(phone,session);
    }

UserServiceImpl:

 @Override
    public Result sedCode(String phone, HttpSession session) {
        //1. 校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            //2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误");
        }

        //3. 符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4. 保存验证码到session
        //session.setAttribute("code",code);
        //4.以手机号为key保存验证码到redis中，key=login:code:13456789001
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone,code,LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //5. 发送验证码
        log.debug("发送短信验证码成功，验证码:{}",code);
        //返回ok
        return Result.ok();
    }

2.短信验证登录功能


    /**
     * 登录功能
     * @param loginForm 登录参数，包含手机号、验证码；或者手机号、密码
     */
    @PostMapping("/login")
    public Result login(@RequestBody LoginFormDTO loginForm, HttpSession session){
        // 实现登录功能
        return userService.login(loginForm, session);
    }

UserServiceImpl


    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1. 校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        //2. 校验验证码 从redis中取出验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if (cacheCode == null || !cacheCode.equals(code)){
            //3. 不一致，报错
            return Result.fail("验证码错误");
        }

        //4.一致，根据手机号查询用户
        User user = query().eq("phone", phone).one();

        //5. 判断用户是否存在
        if (user == null){
            //6. 不存在，创建新用户
            user = createUserWithPhone(phone);
        }
        //7.保存用户信息到redis中
        //7.1随机生成token，生成登录令牌
        String token  = UUID.randomUUID().toString(true);
        //7.2 将user对象转成HashMap存储
        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存储
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        //7.4 设置token有效期
        stringRedisTemplate.expire(tokenKey,LOGIN_USER_TTL,TimeUnit.MINUTES);
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        // 1.创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        // 2.保存用户
        save(user);
        return user;
    }

3.定义拦截器

Session

public class LoginInterceptor implements HandlerInterceptor {


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取session
        HttpSession session = request.getSession();

        //2.获取session中的用户
        Object user = session.getAttribute("user");

        //3.判断用户是否存在
        if(user == null){
            //4.不存在，拦截 返回401状态码
            response.setStatus(401);
            return false;
        }
        //5.存在，保存用户信息到ThreadLocal
        UserHolder.saveUser((User) user);
        return true;
    }
    
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除用户
        UserHolder.removeUser();
    }
}

让拦截器生效

public class MvcConfig implements WebMvcConfigurer {
    public void addInterceptors(InterceptorRegistry registry){
        registry.addInterceptor(new LoginInterceptor())
                //排除不需要拦截的请求
                .excludePathPatterns(
                        "/shop/**",
                        "/voucher/**",
                        "/shop-type/**",
                        "/blog/hot",
                        "/user/code",
                        "/user/login"
                );
    }
}

UserController

 @GetMapping("/me")
    public Result me(){
        //  获取当前登录的用户并返回
        UserDTO user = UserHolder.getUser();
        return  Result.ok(user);
    }

3.基于Redis实现共享session登录

UserServiceImpl

   @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合,返回错误信息
            return Result.fail("手机号格式错误!");
        }
        //3.符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4.保存验证码到session //set key value ex 120 
        //2, TimeUnit.MINUTES :设置有效期
//        session.setAttribute("code",code); 
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_USER_TTL, TimeUnit.MINUTES);
        //5.发送验证码
        log.debug("发送短信验证码成功,验证码:{}",code);

        //返回ok
        return Result.ok();
    }

  @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误!");
        }
        //2.从session中获取验证码
//        Object cacheCode = session.getAttribute("code");
        //从redis中获取验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
        String code = loginForm.getCode();

        if(cacheCode == null || !cacheCode.equals(code)){
            //3.不一致,报错
            return Result.fail("验证码错误!");
        }
        //4.一致，根据手机号查询用户  select * from tb_user where phone = ?
        User user = query().eq("phone", phone).one();
        //5.判断用户是否存在
        if(user == null){
            //6.不存在，创建新用户并保存
            user = createUserWithPhone(phone);
        }

        //7.保存用户信息到redis中
        //7.1 随机生成token，作为登录令牌
        String token = UUID.randomUUID().toString(true);
        //7.2将User对象转为Hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String,Object> userMap = BeanUtil.beanToMap(userDTO);
        //7.3 存储
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        //设置token有效期
        stringRedisTemplate.expire(tokenKey,LOGIN_USER_TTL,TimeUnit.MINUTES);
//        //7.保存用户信息到session中
//        session.setAttribute("user", BeanUtil.copyProperties(user, UserDTO.class));
        //返回token
        return Result.ok(token);
    }

修改拦截器

LoginInterceptor

 private StringRedisTemplate stringRedisTemplate
    public LoginInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        //1.获取session
//        HttpSession session =request.getSession();
//        ///2.获取session中的用户
//        Object user =session.getAttribute("user");
//        //3.判断用户是否存在
//        if(user == null){
//            //4.不存在，拦截，返回401状态码
//            response.setStatus(401);
//            return false;
//        }
//        //5.存在,保存用户信息到ThreadLocal
//        UserHolder.saveUser((UserDTO) user)
//        //6.放行
//        return true;
        //1.获取请求头中的token
        String token = request.getHeader("authorization");
        if(StrUtil.isBlank(token)){
            //不存在，拦截，返回401状态码
            response.setStatus(401);
            return false;
        }
        //2.基于token获取redis中的用户
        String key = LOGIN_USER_KEY + token;
        Map<Object,Object> userMap = stringRedisTemplate.opsForHash()
                        .entries(LOGIN_USER_KEY+token)
        //3.判断用户是否存在
        if(userMap.isEmpty()){
            //4.不存在，拦截，返回401状态码
            response.setStatus(401);
            return false;
        }
        //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
        UserHolder.saveUser(userDTO);
        //7.刷新token有效期
        stringRedisTemplate.expire(key,LOGIN_USER_TTL, TimeUnit.MINUTES);
        //8.放行
        return true;
    }

点击登录时，报服务异常，则进行如下修改:

//7.2将User对象转为HashMap存储
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()));

4.登录拦截器的优化

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.判断是否需要拦截(ThreadLocal中是否有用户)
        if(UserHolder.getUser() == null){
            //没有，需要拦截，设置状态码
            response.setStatus(401);
            //拦截
            return false;
        }
        //有用户，则放行
        return true;
    }
    
}

token刷新拦截器

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.获取请求头中的token
        String token = request.getHeader("authorization");
        if(StrUtil.isBlank(token)){

            return true;
        }
        //2.基于token获取redis中的用户
        String key = LOGIN_USER_KEY + token;
        Map<Object,Object> userMap = stringRedisTemplate.opsForHash()
                        .entries(LOGIN_USER_KEY+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
        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 {
        //移除用户
        UserHolder.removeUser();
    }
}

配置拦截器


@Configuration
public class MvcConfig implements WebMvcConfigurer {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    //order()中值越小，执行的优先级越高
    public void addInterceptors(InterceptorRegistry registry){
        //登录拦截器
        registry.addInterceptor(new LoginInterceptor())
                //排除不需要拦截的请求
                .excludePathPatterns(
                        "/shop/**",
                        "/voucher/**",
                        "/shop-type/**",
                        "/blog/hot",
                        "/user/code",
                        "/user/login"
                ).order(1);
        //token刷新拦截器
        registry.addInterceptor(new RefreshTokenInterceptor(stringRedisTemplate)).addPathPatterns("/**").order(0);
    }
}