What is required to create an online store from scratch in Java?

Good time of day.
The task: create online store for physical store auto parts, the which is not own the database, and uses 4 different database vendors in the procurement prices. Also, you need to create application for popular mobile platforms funktsionalom the online store. Whether the choice of Java as the language for writing the kernel of the site, justified; is it possible to merge 4 different DB in the same directory with the correction of prices; whether a mobile application to interact directly with the kernel and the database of the site; whether there are already ready decisions to similar task, to not reinvent a Bicycle and not to disgrace in front of the "audience"?
PS the Questions are stupid, as still do not pull even Junior.

Thanks in advance!
June 10th 19 at 16:57
1 answer
June 10th 19 at 16:59
Solution
Whether the choice of Java as the language for writing the kernel of the site, justified

If you are more comfortable in Java, write in Java.

is it possible to merge 4 different DB in the same directory as you edit the prices

Yeah, maybe. I have a few online shops of auto parts one way or another regularly sinhroniziruete its database with databases of providers.

can the mobile app to interact directly with the kernel and the database of the site

Can. Fasten to the site a rest interface and pull it from the mobile app.

is there any already ready decisions to similar task, to not reinvent a Bicycle and not a shame to "public"

Nothing would not have to shag more than when designing from scratch.
With ORM development took place? - marilyne_Roh commented on June 10th 19 at 17:02
Yes. - samir39 commented on June 10th 19 at 17:05
And what is ready for Java? Under .net nopcommerce is being developed in Russia and has integration with all of our decisions. For Java out of the box did not meet adequate. - Shanie_Armstrong98 commented on June 10th 19 at 17:08
I this question is not deepened. Occasionally seen mention of a java engine to create online stores, but have never even read their descriptions, not to mention how to understand them more. - samir39 commented on June 10th 19 at 17:11

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