please help, unable to run in intellij

Hello guys, I got a free source off this forums, it was previous source back in 2013 I think, however I'm trying to run in intellij with the SDK path, so I can see if there is any errors, and also would like to make the run feature in intellij work the same as the run.bat folder, however I keep getting errors about the SQL in the com data, however I don't have a forums or a website yet, I was just curious why does the server turn on if I manually use the run.bat folder in the client folder, but when I use the ' run ' feature in intellij it shows errors regarding the sql ?

I'm just trying to get intellij to make the server open within that program, also I am trying to figure out how to use intellij to make a jar file, if any one can help me please let me know! thank you so much !

"C:\Program Files\Java\jdk1.8.0_161\bin\java" -Dfile.encoding=windows-1252 -jar " Source\lib\mysql-connector.jar"
no main manifest attribute, in Source\lib\mysql-connector.jar

Process finished with exit code 1"

above is the error I'm receiving !