requirement:
- database: oracle, server: tomcat, jdk
chat:
- http://127.0.0.1:8080/WebSocket_Message/messageInfo.html
- http://127.0.0.1:8080/WebSocket_Message/messageInfo1.html
- above two pages you can talk to yourself
if you want to do online with others, you can use NAT. here. https://ngrok.com/