用户登录

# 用户登录

接口：

@PostMapping("/api/short-link/admin/v1/user/login")
public Result<UserLoginRespDTO> login(@RequestBody UserLoginReqDTO requestParam) {
    return Results.success(userService.login(requestParam));
}

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@Override
public UserLoginRespDTO login(UserLoginReqDTO requestParam) {
    LambdaQueryWrapper<UserDO> queryWrapper = Wrappers.lambdaQuery(UserDO.class)
            .eq(UserDO::getUsername, requestParam.getUsername())
            .eq(UserDO::getPassword, requestParam.getPassword())
            .eq(UserDO::getDelFlag, 0);
    UserDO userDO = baseMapper.selectOne(queryWrapper);
    if(userDO==null){
        throw new ClientException("用户不存在");
    }
    // 防止重复登录
    Map<Object ,Object> hasLoginMap = stringRedisTemplate.opsForHash().entries("login_" + requestParam.getUsername());
    if(CollUtil.isNotEmpty(hasLoginMap)){
        String token = hasLoginMap.keySet().stream()
                .findFirst()
                .map(Object::toString)
                .orElseThrow(()->new ClientException("用户登录错误"));
        return new UserLoginRespDTO(token);
    }
    /**
     * Hash
     * Key：login_用户名
     * Value：
     *  Key：token标识
     *  Val：JSON 字符串（用户信息）
     */
    String uuid = UUID.randomUUID().toString();
    stringRedisTemplate.opsForHash().put("login_" + requestParam.getUsername(), uuid, JSON.toJSONString(userDO));
    stringRedisTemplate.expire("login_" + requestParam.getUsername(), 30L, TimeUnit.MINUTES);
    return new UserLoginRespDTO(uuid);
}

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# 检查用户是否登录

接口：

@GetMapping("/api/short-link/admin/v1/user/check-login")
public Result<Boolean> checkLogin(@RequestParam("username") String username, @RequestParam("token") String token) {
    return Results.success(userService.checkLogin(username, token));
}

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@Override
public Boolean checkLogin(String username, String token) {
    return stringRedisTemplate.opsForHash().get("login_" + username, token) != null;
}

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# 退出登录

接口：

@DeleteMapping("/api/short-link/admin/v1/user/logout")
public Result<Void> logout(@RequestParam("username") String username, @RequestParam("token") String token) {
    userService.logout(username, token);
    return Results.success();
}

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@Override
public void logout(String username, String token) {
    if (checkLogin(username, token)) {
        stringRedisTemplate.delete("login_" + username);
        return;
    }
    throw new ClientException("用户Token不存在或用户未登录");
}

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