1、单点登录解决方案

• 多个系统只有一个登录服务

1.1、后端保存登录状态

1.2、token模式

2、user服务-登录接口

2.1、UserController

	@Operation( summary = "用户登录接口")
    @PostMapping("/login")
    public Result login(@RequestBody UserInfo userInfo) {
        String token = userInfoService.login(userInfo);
        return Result.ok(token);
    }

2.2、UserInfoServiceImpl

    @Override
    public String login(UserInfo userInfo) {
        //1、校验参数
        String username = userInfo.getUsername();
        String password = userInfo.getPassword();
        if (StringUtils.isEmpty(username) || StringUtils.isEmpty(password)) {
            throw new SpzxException(ResultCodeEnum.LOGIN_PARAMS_ERROR, null);
        }
        //2、根据账号查询用户信息
        UserInfo dbUserInfo = this.getOne(Wrappers.lambdaQuery(UserInfo.class).eq(UserInfo::getUsername, username));

        if (dbUserInfo == null) {
            throw new SpzxException(ResultCodeEnum.LOGIN_USERNAME_ERROR, null);
        }
        //判断用户状态，用户状态校验
        if (dbUserInfo.getStatus() != 1) {
            throw new SpzxException(ResultCodeEnum.LOGIN_USER_STATUS_ERROR, null);
        }
        //3、账号存在，校验密码
        //使用明文密码 和 盐 采用注册的加密方式加密 和数据库密文比较
        String encodePwd = DigestUtils.md5DigestAsHex((
                DigestUtils.md5DigestAsHex(password.getBytes()) + dbUserInfo.getSalt()).getBytes());
        if (!encodePwd.equals(dbUserInfo.getPassword())) {
            throw new SpzxException(ResultCodeEnum.LOGIN_PASSWORD_ERROR, null);
        }
        //密码正确
        //4、生成token 缓存到redis中
        String token = IdUtil.getSnowflake(1, 1).nextIdStr();
        // 将用户密码重置为null，表示清除密码信息
        dbUserInfo.setPassword(null);
        // 将用户盐值重置为null，配合密码重置，确保安全性和一致性
        dbUserInfo.setSalt(null);

        redisTemplate.opsForValue().set("spzx:user:login:" + token, dbUserInfo, 7, TimeUnit.DAYS);

        //登录成功：更新用户最后一次登录的时间 和 ip地址
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();

        HttpServletRequest request = requestAttributes.getRequest();


        return token;
    }

2.3、载荷

{
  "username": "18947628476",
  "password": "123456"
}

2.4、响应

{"code":200,"message":"SUCCESS","data":"1801188891328385024"}

2.5、Redis Desktop Manager

{
    "@class": "com.atguigu.spzx.model.entity.h5.UserInfo",
    "id": 1774759294596579329,
    "createTime": [
        "java.util.Date",
        "2024-04-01 19:22:44"
    ],
    "updateTime": [
        "java.util.Date",
        1718243055000
    ],
    "deleted": false,
    "username": "18947628476",
    "password": null,
    "nickName": "小弟",
    "avatar": "https://cdn.apifox.com/app/project-icon/builtin/16.jpg",
    "sex": null,
    "phone": null,
    "memo": null,
    "openId": null,
    "unionId": null,
    "lastLoginIp": null,
    "lastLoginTime": null,
    "status": 1,
    "salt": null
}