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JSP

JSP

(JavaServer

Pages)

is

initiated

by

Sun

Microsystems,

Inc.,

with

many

companies

to

participate

in

the

establishment

of

a

dynamic

web

page

technical

standards.

JSP

technology

somewhat similar to ASP technology, it is in the traditional HTML web page document (*. htm, *.

html) to insert the Java programming paragraph (Scriptlet) and JSP tag (tag), thus JSP documents

(*. jsp).

Using JSP development of the Web application is cross-platform

that can run on Linux, is

also available for other operating systems.

JSP technology to use the Java programming language prepared by the category of XML tags

and scriptlets, to produce dynamic pages package processing logic. Page also visit by

tags and

scriptlets exist in the services side of the resources of logic. JSP page logic and web page design

and

display

separation,

support

reusable

component-based

design,

Web-based

application

development is rapid and easy.

Web server in the face of visits JSP page request, the first implementation of the procedures

of, and then together with the results of the implementation of JSP documents in HTML code with

the

return

to

the

customer.

Insert

the

Java

programming

operation

of

the

database

can

be

re- oriented websites, in order to achieve the establishment of dynamic pages needed to function.

JSP and Java Servlet, is in the implementation of the server, usually returned to the client is

an HTML text, as long as the client browser will be able to visit.

JSP

1.0

specification

of

the

final

version

is

launched

in

September

1999,

December

has

introduced 1.1 specifications. At present relatively new is JSP1.2 norms, JSP2.0 norms of the draft

has also been introduced.

JSP pages from HTML code and Java code embedded in one of the components. The server

was in the pages of client requests after the Java code and then will generate the HTML pages to

return

to

the

client

browser.

Java

Servlet

JSP

is

the

technical

foundation

and

large-scale

Web

application

development

needs

of

Java

Servlet

and

JSP

support

to

complete.

JSP with

the

Java

technology easy to use, fully object- oriented, and a platform-independent and secure, mainly for

all the characteristics of the Internet.

JavaScript,

which

is

completely

distinct

from

the

Java programming

language,

is normally

used to dynamically generate HTML on the client, building parts of the Web page as the browser

loads the document. This is a useful capability and does not normally overlap with the capabilities

of JSP (which runs only on the server). JSP pages still include SCRIPT tags for JavaScript, just as

normal HTML pages do. In fact, JSP can even be used to dynamically generate the JavaScript that

will

be

sent

to

the

client.

So,

JavaScript

is

not

a

competing

technology;

it

is

a

complementary

is also possible to use JavaScript on the server, most notably on Sun ONE (formerly iPlanet),

IIS, and BroadVision servers. However, Java is more powerful, flexible, reliable, and portable.

JSP

(a

recursive

acronym

for

Hypertext

Preprocessor

is

a

free,

open-source,

HTML-embedded

scripting

language

that

is

somewhat

similar

to

both

ASP

and

JSP.

One

advantage of JSP is that the dynamic part is written in Java, which already has an extensive API

for networking, database access, distributed objects, and the like, whereas PHP requires learning

an entirely new, less widely used language. A second advantage is that JSP is much more widely

supported by tool and server vendors than is Pure Servlets.

JSP

doesn't

provide

any

capabilities

that

couldn't,

in

principle,

be

accomplished

with

servlets. In fact, JSP documents are automatically translated into servlets behind the scenes. But it

is more convenient to write (and to modify!) regular HTML than to use a zillion println statements

to generate the HTML. Plus, by separating the presentation from the content, you can put different

people on different tasks: your Web page design experts can build the HTML by using familiar

tools and either leave places for your servlet programmers to insert the dynamic content or invoke

the dynamic content indirectly by means of XML tags.

Does this mean that

you can just learn JSP and forget about servlets? Absolutely

not! JSP

developers need to know servlets for four reasons:

a.

JSP

pages

get

translated

into

servlets.

You

can't

understand

how

JSP

works

without

understanding servlets.

b.

JSP consists of static HTML, special-purpose JSP tags, and Java code. What kind of Java

code? Servlet code! You can't write that code if you don't understand servlet programming.

c.

Some tasks are better accomplished by servlets than by JSP. JSP is good at generating

pages

that

consist

of

large

sections

of

fairly

well

structured

HTML

or

other

character

data.

Servlets are better for generating binary data, building pages with highly variable structure, and

performing tasks (such as redirection) that involve little or no output.

d.

Some tasks are better accomplished by a combination of servlets and JSP than by either

servlets or JSP alone.

JSP technology strength

(1)

time

to

prepare,

run

everywhere.

At

this

point

Java

better

than

PHP,

in

addition

to

systems, the code not to make any changes.

(2)

the multi- platform support. Basically on all platforms of any development environment,

in any environment for deployment in any environment in the expansion. Compared ASP / PHP

limitations are obvious.