Design database: design a database, including food information table, order information table and user information table. Each table needs to define the corresponding fields and establish the relationship between them.
Develop websites or applications: Develop websites or applications by using front-end technology, and let customers enter the ordering system by scanning QR codes. Customers can select dishes in the website or application, add them to the shopping cart, and then submit an order.
Develop back-end program: develop a program using back-end technology to process orders and payments. When a customer submits an order, the back-end program will generate an order record and save the order information in the database. After the order is paid, the backend program will update the order status, user balance and other information.
Develop payment interface: connect with third-party payment platforms (such as Alipay and WeChat payment) to realize payment function.
Develop an administrator interface: develop an administrator interface so that merchants can view orders, food sales and other information. Administrators can adjust the price of dishes or add new dishes according to the sales situation.
Realize order push: push order information to merchants by using message push technology. When a new order is generated, the merchant will receive a push message and can process the order in time.
Integrated QR code generation: generate a QR code by using a third-party Java library, and associate the QR code with the order number, so that customers can quickly enter the ordering system by scanning the QR code and conveniently complete the functions of ordering and paying.
Test and optimization: After the development is completed, test and optimize the system. Testing includes functional testing and performance testing, and optimization includes adjusting database and program performance. Finally, the system can run stably and provide a good user experience.
The above are some basic steps and ideas to realize the scanning code ordering system, and some details and exception handling need to be considered in the specific implementation. This system needs to involve many technical fields, and it takes a certain amount of time and energy to complete.
But you are just a merchant, and you can only use it if it is generated with the next delivery treasure. There is no need to develop it yourself.