Re: newbie: JSP vs Servlets

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Sat, 30 Dec 2006 10:28:32 -0500
Message-ID:
<459685a2$0$49201$14726298@news.sunsite.dk>
R.A.M. wrote:

Uzytkownik "Arne Vajh?j" <arne@vajhoej.dk> napisal w wiadomosci
news:45956ef0$0$49199$14726298@news.sunsite.dk...

Robert Magdziarz wrote:

Uzytkownik "Arne Vajh?j" <arne@vajhoej.dk> napisal w wiadomosci
news:45955692$0$49207$14726298@news.sunsite.dk...

JSP pages get compiled to servlets so performance should
be the same.

Does this mean that when I open URL http://localhost/xyz/xyz.jsp the code
in <% %> is run compiled, not interpreted?

Not only compiled - tripple compiled !!

First the JSP compiler translates the JSP page to Java source (servlet).

Then the Java compiler translates that Java source to Java byte code.

And when run the JIT compiler translates the Java byte code to
native instructions.

 > Is it possible to see source code of the servlet generated?

Yes. At least usually.

If you are using a stanldone Tomcat then look in:

<Tomcat root>/work/Catalina/<hostname>/<webapp name>/org/apache/jsp

In JBoss with Tomcat it is:

<JBoss root>/server/<config>\work\jboss.web\<hostname>\<webapp
name>\org\apache\jsp

In WAS I belive that you need to set a configuration parameter
to get it to keep the Java source.

Arne

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