| Java
Server Pages - The Power of Server-Side Java |
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| Java has traditionally been known for providing
great Web client-side application support.
Java is also a great platform for writing
the server side of your Web-based applications.
JavaServer Pages offer Web builders a very
powerful way of dealing with unknown or thin
client requirements. The same features that
make Java an excellent platform for writing
client applications make it excellent for
writing server applications. Your server applications
will benefit from Java's rapid development
features such as type safety, absence of memory
leaks and multithreading support even more
than your client applications did. Additionally,
the Java platform provides extensibility into
the enterprise. JSP technology is a key component
of the Java 2 Enterprise Edition platform.
Using JSP technology, organizations are able
to leverage existing Java platform expertise
and create highly scalable enterprise applications.
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| Easy
and Rapid Web Development, Deployment and
Maintenance |
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| JavaServer Pages simplify and speed the
development process for developers and page
authors alike. Instead of writing a Java program,
page authors simply write a page using: HTML
and then add the XML-like tags and, if necessary,
scriptlets to tie everything together. Additionally
by supporting component-based development
and customized tag libraries, JSP pages not
only simplify page authoring but also provide
a strong foundation for a wide range of page
authoring tools. Once developed, JSP pages
are easy to maintain because of the separation
of the application logic (typically residing
within customized tag libraries or Beans)
and the page design/content. |
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| Emphasizing
Reusable Components |
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| Most JSP pages rely on reusable, cross-platform
components (JavaBeans or Enterprise JavaBeansTM
components) to perform the more complex processing
required of the application. Developers can
share and exchange components that perform
common operations, or make them available
to larger user or customer communities. The
component-based approach speeds overall development
and lets organizations leverage their existing
expertise and development efforts for optimal
results. |
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| Separating
Content Generation from Presentation |
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| Using JSP technology, web page developers
use HTML or XML tags to design and format
the Web page. They use JSP tags or scriptlets
to generate the dynamic content on the page
(the content that changes according to the
request, such as requested account information
or the price of a specific bottle of wine).
The logic that generates the content is encapsulated
in tags and JavaBeans components and tied
together in scriptlets, all of which are executed
on the server side. If the core logic is encapsulated
in tags and Beans, then other individuals,
such as web masters and page designers, can
edit and work with the JSP page without affecting
the generation of the content. This helps
authors protect their own proprietary code
while ensuring complete portability for any
HTML-based web browser. |
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| Open
Development and Widespread Industry Support |
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| The JSP specification is developed under
the Java Community Process. This guarantees
that the specification has a broad spectrum
of industry input and support. This widespread
support helps to ensure that JSP technology
is supported in a wide variety of Web and
application servers. Additionally, the reference
implementation is now developed openly under
the Apache process. By working through the
open process of the Apache Software Foundation,
the latest JSP technology will have a world-class
implementation available as soon as possible.
Sun Microsystems is committed to maintaining
the portability and openness of the JSP specification
and development process. |
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| Platform
Independence |
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| Java Server Pages technology delivers "Write
Once, Run Anywhere" capability, offering
unprecedented reuse on any platform, any server.
JavaServer Pages provide a component-based,
platform-independent method for building Web-based
applications. Most Web and application servers
are currently delivering or are about to deliver
products that support the JavaServer Pages
technology. This widespread, multi-platform
support empowers Web developers to write their
JavaServer Pages code once and run it anywhere. |
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| Simplifying
Page Development with Tags |
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| Web page developers are not always programmers
familiar with scripting languages. The JavaServer
Pages technology encapsulates much of the
functionality required for dynamic content
generation in easy-to-use, JSP-specific XML
tags. Standard JSP tags can access and instantiate
JavaBeans components, set or retrieve bean
attributes, download applets, and perform
other functions that are otherwise more difficult
and time-consuming to code. The JSP technology
is extensible through the development of customized
tag libraries. Over time, third-party developers
and others will create their own tag libraries
for common functions. This lets web page developers
work with familiar tools and constructs, such
as tags, to perform sophisticated functions.
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