Is there any way like I can call MQL4/MQL5 EA's Method from JSP/JAVA ?
or is any command line argument can we pass in Metatrader ?
Look here: https://www.metatrader5.com/en/terminal/help/start_advanced/start
The section called "Running from the Command Line"
This may also help: https://www.mql5.com/en/forum/127577
You don't tell your boss what to do, he tells you, but you can give him suggestions. MQLx calls Java, it can only return values, that MQLx can use. Why complicate things, just code it in MQLx.