servlet

So basically, a JSP is the same as a servlet with a doGet method which has text/html as it's responseType

With a servlet, you can do doPost too :-) (as well as others)

http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/Servlet-Tutorial-Overview.html

Added to that list is the fact that there are now hundreds of tag-libraries you can plug in to JSPs (or write your own)

when it says...

Building Web pages on the fly is useful ....for e-commerce sites do this as well.


building webpages on the fly means..they refresh on a timer basis and update records?

what do e-commerce sites usually do?


Moiz

No, the page has current (up to date) data on it is what they mean...  they are talking about dynamic pages as a whole (both jsp and servlet allow you to do this, as does ASP, CGI, etc)

That link is a bit rubbish...sorry :-(

a JSP is a Servlet that thinks it's a Web page.

 Both use server-side Java to dynamically generate web pages. The source code to a JSP looks like HTML, with Java embedded inside funny tags (*); the source code to a servlet looks like Java, with HTML embedded in out.print(...) statements. Both use the Servlet API to communicate with the web server and the client. In fact, a JSP gets compiled into a servlet, so they're almost identical in terms of expressive power. The choice is, whether you're more comfortable coding your pages in Java or in JSP-style HTML; and since you can call a JSP from a Servlet and vice versa, you don't have to make an either-or decision.

>> By JSP, you're writing java language inside HTML file.
>> By Servlet, you're writing  HTML language inside JAVA file.

Unless of course, you're handling binary data, like generating an image on the fly...