This project is a secure, local-network chat application with file sharing capabilities. It uses strong encryption to protect messages and allows administrators to manage user information. Built with Java, it leverages multithreading for efficient performance and a MySQL database for storing chat logs. It's made as the final report for the Course "Computer Network Programming" at Ton Duc Thang University

• Multithread programming
• TCP/IP Socket (Local Network)
• AES Encryption
• Database (MySQL)
• JavaSwing GUI

• Send/Receive messages in a group
• Clear/Load Chat Log from Database
• Encrypt and Decrypt messages

• Upload File to Server
• Get the uploaded File

• Show Users Information
• Add/Remove Users
• Edit Users Information

This project requires below technologies to implement:

• MySQL 8
• Netbean 16 (JDK 19) (Other IDE such as IntelliJ)

• Clone this repository
• Open the repository in your IDE
• Import chat_app.sql to MySQL Database
• Config the Database information in src/core/Database.java
• Build the project
• Run the ServerInitialize.java to start the Server
• Run the App.java to start a client

ServerInitialize.java turn on the Server to accept the Client Socket, also create a Client represent to it's own App.java turn on a Client each time it's started. The client search for Server Socket constantly and automatically.

• The Chat feature only available when it's connected to the Server
• The User Management feature only available to User has Role = 1 and the Server

• Witt Code - "Java Socket Programming - Send and Download Files Between Client and Server" - (https://youtu.be/GLrlwwyd1gY)
• Witt Code - "Java Socket Programming - Multiple Clients Chat" - (https://www.youtube.com/watch?v=gLfuZrrfKes)
• Coding with John - "Multithreading in Java Explained in 10 Minutes" - (https://www.youtube.com/watch?v=r_MbozD32eo)