java - Scala, Spring or Hadoop as an Api service? -

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i starting new java application - , current code base taking on - appears have been built jetty , writing out html markup directly servlet itself.

package root.web; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse;      public class html {          public static string gethead(int pin,boolean due,                 string fname, string lname){          string head = "";     head += "<!doctype html>";     head += " <html>";      head += " <head>";

i interested in re-building application using scala, spring or hadoop - keen discuss links, tutorials develop quick , secure api. "login system" user filling in forms - , having data these forms stored in mysql table , displayed charts/tables/lists.

so keen build frontend using reactjs - , have java application provide api service.

-- login service -- forgot password, session handling, account changes - crud of sorts

-- user fill in set of forms -- , getdata of results specific logged in user

please advise, code samples, tutorials, links. predict easier/quicker , more secure start fresh scala, spring or hadoop project , use query builders - secure db -- if mysql or mongodb should used , if makes of difference in case, creating json api service, crud application login handling?

hadoop unsuitable task. it's distributed storage / compute platform, similar google's mapreduce or amazon's emr -- has nothing web development, api.

if want write web application, need web application framework. hadoop not that.





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