Java EE (J2EE) Tutorial for beginners Part7

Java EE (J2EE) Tutorial for beginners Part7: Spring Framework + Spring Webflow + Spring Security + JPA (Hibernate) + JSF 2.0 (PrimeFaces) + Apache Maven 2 + Apache Tomcat + Subclipse + Oracle RDBMS + Eclipse IDE

[pompeez]

Amazing series.Very helpful and nicely put. Keep up the good work!

[afifasultana]

really helpful for me before my knowledge in J2EE is zero.Easy understanable.Masallah :-)

[selmi]

thank you, i hope you don't give up very good work

[venkatramanmn]

Very Nicely done! Works smoothly...

Many Thanks!

[daraLorelai]

thank you for the time you put in this tutorials...
they Are really helpful

[utopcu]

if we want to forward servlet to index.jsp at first we must use:

||

because at very first beginning firstname and lastname are null. after forwarding if we submit when the fields are blank. now firstname and lastname are not null they are just empty strings. like this -> ""

the most correct way is first null check for first run of application and then equals("") check for blank submits.

[glrk]

Hey man i realy need to say thanks for this awesome tutorial !

[PaoloGuagliumi]

I've changed some lines, because the check of null values doesn't work on my Server:

String name = request.getParameter("name");

if ((name==null) || (name.isEmpty())){
getServletContext().getRequestDispatcher("/index.jsp").forward(request, response);
return;
}

[arthurvin]

We will define OracleDataSource bean with URL, user and password properties..., and pass dataSource reference to Spring's entity manager factory bean so that JPA and hibernate takes care of data source pooling. That will be in one of the next videos.
If i'll have enough time I will show how to use JNDI resources for that purpose. Let's say if there will be enough interest from public, I'll try to find some time.
But if you are talking about Servlets&JSP case - that won't be covered in that tut.

[mouradici]

i didn't get it to work in the conditional statement : 
||

then i changed null with "" and it works ^^
so thanks man

[TheBzonga]

Great videos! Will you be uploading the code somewhere?

[redsanso]

Years of JavaScript hardcoding forces me to share this advice width you:
in OOP, if you want to check if a String is !=null, just do:

  if( string.length()>0 )   // do something.
  else   // gfy.

So, in our case, this tip would translate to:

  if(  ||  ) {
   // gfy.
} else {
   // do the output
}

[lungolago]

Hello Art, great stuff so far. Quick easy question in your example here why are we moving stuff in the request from getParameter to setAttribute in the servlet? In the output.jsp you can just grab from getParameter directly (both are in request after all) and access within scriplets. It would make more sense if we were grabbing from request and setting in session object. Thanks Man

[TheNacami]

ahahah Duncan Mcloud :D
HIGHLANDEEEER! YEAH! :D
awesome :D

[stillalive]

Nice job. I have two questions:
I did not understand why you tested for null.
What is the point of getting parameter from request and seting to the same value again?

[Adarsh]

Perfect!! Thanks for the explanation :)

[pnbalaji]

Hi Arthur,

Great videos and you are an excellent tutor. I really enjoy your videos. In part 4 video, you have selected the tomcat runtime environment from c:\Program Files. However, the downloaded tomcat was extracted in C:\J2EETutorial folder. Is this a mistake or am I missing something?

[nischintr]

Hey... Where are the other videos...? Waiting for the other videos...

[danielkovacs]

will you publish the code pls? i do not get first and lastname after submit, but if i run the output.jsp i get back the h1 text and null null

[jeremyadriandevera]

This will work:

== null || == null || || {

setting it == "") will forward it to output.jsp, so the above answer will do the trick