需求: 需要将一些敏感信息保存在JWT中,以便提高业务处理效率. 众所周知JWT协议RFC7519使用Base64Url对Header和Payload的Json字符串进行编解码.A JWT is represented as a sequence of URL-safe parts separated by period ('.') characters. Each part contains a base64url-encoded value. 不幸地的是Base64Url编码方式不是加密手段