Introduction - If you have any usage issues, please Google them yourself
The code for this project is Servlet+jsp. (OAuth2.0 code used inside, I have all encapsulated, you use the code, you can call directly).
Home page, we want to generate a WeChat public number connection address, we send this address to the user's WeChat above (here address can be embedded in the picture, can also be sent in other ways). When the user clicks on the link address it out below the interface, if the user clicks to confirm [login], we jump to the specified servlet and get the user information, and then jump to a JSP page that will display information.