Note: This Java plug-in guide describes features released prior to the Java SE 6 update 10 release. See Java Rich Internet Applications Development and Deployment for the latest information.
This chapter includes the following topics:
JavaServer Pages (JSP) is a technology for generating dynamic web-page content from a web/application server. JSP provides support for Java Plug-in HTML elements. This document tells how to use the JSP Plug-in action element for deploying applets with Java Plug-in.
<jsp:plugin>The <jsp:plugin> action element enables a JSP
page author to generate HTML for downloading the Java Plug-in, if
it is not installed, and executing an applet. Specifically the
action generates the OBJECT element for Internet Explorer or the
EMBED element for Netscape Navigator.
When the JSP is executed, the <jsp:plugin>
action element is replaced by either an <OBJECT>
or <EMBED> HTML tag, depending on the
browser.
For example, an applet may be specified as follows in JSP:
<jsp:plugin type=applet code="Molecule" codebase="/html" >
<jsp:params>
<jsp:param name="molecule" value="molecules/benzene.mol"/>
</jsp:params>
<jsp:fallback>
<p> Unable to start Plug-in. </p>
</jsp:fallback>
</jsp:plugin>
In the above example, the attributes of the
<jsp:plugin> element provide configuration data
for the applet itself. The <jsp:param> elements
specify the parameters to the applet. The
<jsp:fallback> element specifies content for the
browser if Java Plug-in fails to start.
Depending on the User Agent requesting the JSP page, the web
server will generate either an EMBED or
OBJECT tag.
For example, if Netscape Navigator is the User Agent requesting
the JSP page, the following EMBED tag will be produced
by the server:
<EMBED type="application/x-java-applet"
code="Molecule" codebase="/html" molecule="molecules/benzene.mol">
<NOEMBED>
<p> Unable to start plug-in </p>
</NOEMBED>
NoteThe above works for Netscape 4, as it supports the
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For more information about the <jsp:plugin>
element, see Java
Server Pages Specification.
JSP provides an alternative way to deploy applets through Java Plug-in. Because of the dynamic nature of JSP, developers will be able to generate HTML pages on-the-fly that take advantage of Java Plug-in much more easily than before.
Although <jsp:plugin> tag support is part of
the JSP specification, various web or application server vendors
may provide different implementations and different levels of
controls over this feature. For more information, contact your
server vendor.
