Red Hat NETSCAPE ENTERPRISE SERVER 6.1 - NSAPI PROGRAMMER GUIDE Manual de usuario descargar pdf (Pagina 22)

Enterprise Server 6.1 APIs

22 Netscape Enterprise Server Programmer’s Guide • April 2002 (Draft)

A JavaServer Page (JSP) is a page, much like an HTML page, that can be viewed in

a web browser. However,in addition to HTML tags, itcan include a set ofJSP tags

and directives intermixed with Java code that extend the ability of the web page

designer to incorporate dynamic content in a page. These additional features

provide functionality such as displaying property values and using simple

conditionals.

For more information on using JavaServer Pages, see the JavaServer Pages

documentation from Sun Microsystems at:

http://java.sun.com/products/jsp/index.html

Enabling Java Servlets and JavaServer Pages

To enable servlets, select the Java tab in the Server manager, then select the

Enable/Disable Servlets/JSP tab. Check the Enable Java Globally box to enable

servlets for the entire server.Check the Enable Java for Class box to enable servlets

for a single virtual server class. You cannot enable servlets for a class unless Java is

globally enabled. By default, Java is globally enabled and enabled for each virtual

server class.

Toenable JSPs, you must also include the

jsp-servlet element with enable=true

in the web-apps.xml file and add tools.jar to the JVM classpath. If you want to

run uncompiled JSPs, you must also install the Java Development Kit (JDK).

When you install Enterprise Server 6.1, you can choose to install the Java Runtime

Environment (JRE), which is provided with Enterprise Server, or you can specify a

path to a JDK. The JDK is not bundled with the Enterprise Server, but you can

download it for free from Sun Microsystems at:

http://java.sun.com/products/jdk/1.4/

The server can run servlets and precompiled JSPs using the JRE, but it needs the

JDK to run uncompiled JSPs.

Enterprise Server 6.1 requires you to use an official version of JDK 1.4. For details,

see the Netscape Enterprise Server Programmer’s Guide to Servlets.

Regardless of whether you choose to install the JRE or specifya pathto the JDK

during installation, you can tell the Enterprise Server to switch to using either the

JREorJDKatanytimebyusingthe“ConfigureJRE/JDKPaths”pageintheGlobal

Settings tab of the Administration Server.

The

magnus.conf file contains thefollowingInit directives. Thefirst one loads the

servlets library and makes the servlet-related functions available to the Enterprise

Server. The other two directives initialize the servlet engine. The

shlib value

shown is for Windows NT/Windows 2000.

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Red Hat NETSCAPE ENTERPRISE SERVER 6.1 - NSAPI PROGRAMMER GUIDE Manual de usuario Pagina 22