Java-based LAN chat program (server-side) with a MySQL database to store user data to achieve a single chat, group chat, file transfer and other functions

QQSystemServer\.classpath
..............\.project
..............\bin\server\driver\Application.class
..............\...\......\......\DBManager.class
..............\...\......\model\UserDAO.class
..............\...\......\thread\ChatToClient.class
..............\...\......\......\RegisterThread.class
..............\...\......\vo\User.class
..............\qqsys.sql
..............\src\server\driver\Application.java
..............\...\......\......\DBManager.java
..............\...\......\model\UserDAO.java
..............\...\......\thread\ChatToClient.java
..............\...\......\......\RegisterThread.java
..............\...\......\vo\User.java
..............\bin\server\driver
..............\...\......\model
..............\...\......\thread
..............\...\......\vo
..............\src\server\driver
..............\...\......\model
..............\...\......\thread
..............\...\......\vo
..............\bin\server
..............\src\server
..............\bin
..............\src
QQSystemServer

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