是否可以在桌面上创建从手机到 java 的连接（websocket？）？

Question

I would like to send data directly from my Android phone to Java in the web browser on my desktop. Both devices may not be on the same su.net. Is it actually possible, or do the both devices first need to connect to a common server on the Inte.net that relays the data between two websockets ?

Answer 1

Since both applications (browser + app) are both websocket clients, you need a third application acting as the websocket server. This third application has to offer the websocket(s) that both applications connect to ws://third-app/socket .

If this app is running locally in your.network or on a server on the Inte.net is up to you. But if both devices are in different su.nets your firewalls/routers have to ensure that both devices can reach the websocket server.