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Oracle9iAS Containers for J2EE Support for JavaServer Pages Reference
Release 2 (9.0.2)
Part Number A95882-01
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Preface

This document introduces and explains the Oracle implementation of JavaServer Pages (JSP) technology, specified by Sun Microsystems. It summarizes standard features, as specified by Sun, but focuses primarily on Oracle implementation details and value-added features.

The OC4J JSP container in Oracle9iAS 9.0.2 is a complete implementation of the Sun Microsystems JavaServer Pages Specification, Version 1.1, with many JSP 1.2-compliant features as well. There will be a fully 1.2-compliant release in the near future.

This preface contains these topics:

Intended Audience

This document is intended for developers interested in creating Web applications based on JavaServer Pages technology. It assumes that working Web and servlet environments already exist, and that readers are already familiar with the following:

While some information about standard JSP 1.1 technology and syntax is provided in Chapter 1 and elsewhere, there is no attempt at completeness in this area. For additional information about standard JSP 1.1 features, consult the Sun Microsystems JavaServer Pages Specification, Version 1.1 or other appropriate reference materials.

Because the JSP 1.1 specification relies on a servlet 2.2 environment, this document is geared largely toward such environments, as well as some JSP 1.2 and servlet 2.3 features. The OC4J JSP container has special features for earlier servlet environments, however, and there is special discussion of these features in Appendix B as they relate to servlet 2.0 environments, particularly Apache JServ, which is included with the Oracle9i Application Server.

For documentation of tag libraries and utilities that are provided with the OC4J product, please refer to the Oracle9iAS Containers for J2EE JSP Tag Libraries and Utilities Reference (although an overview is provided here, in "Overview of Tag Libraries and Utilities Provided with OC4J").

For a quick primer about getting started with JSP pages in OC4J, see the Oracle9iAS Containers for J2EE User's Guide.

Documentation Accessibility

Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the disabled community. To that end, our documentation includes features that make information available to users of assistive technology. This documentation is available in HTML format, and contains markup to facilitate access by the disabled community. Standards will continue to evolve over time, and Oracle Corporation is actively engaged with other market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our customers. For additional information, visit the Oracle Accessibility Program Web site at 

http://www.oracle.com/accessibility/
Accessibility of Code Examples in Documentation

JAWS, a Windows screen reader, may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an otherwise empty line; however, JAWS may not always read a line of text that consists solely of a bracket or brace.

Accessibility of Links to External Web Sites in Documentation

This documentation may contain links to Web sites of other companies or organizations that Oracle Corporation does not own or control. Oracle Corporation neither evaluates nor makes any representations regarding the accessibility of these Web sites.

Organization

This document contains:

Chapter 1, "General JSP Overview"

This chapter highlights standard JSP 1.1 technology. It is not intended as a complete reference.

Chapter 2, "Overview of the Oracle JSP Implementation"

This chapter provides an overview of the JSP implementation provided with OC4J, including both portable and Oracle-specific value-added features.

Chapter 3, "Getting Started"

This contains information about required files for the OC4J JSP container, OC4J Web server configuration, and JSP configuration.

Chapter 4, "Basic Programming Issues"

This chapter introduces basic JSP programming considerations and provides a starter sample for database access.

Chapter 5, "Key Considerations"

This chapter discusses a variety of general programming and configuration issues and data-access considerations that the developer should be aware of. It also covers considerations specific to the OC4J environment.

Chapter 6, "JSP Translation and Deployment"

This chapter describes features of the Oracle9iAS JSP translator and Oracle ojspc pre-translation utility, and discusses general and OC4J-specific deployment considerations.

Chapter 7, "JSP Tag Libraries"

This chapter introduces the basic JSP 1.1 framework for custom tag libraries.

Chapter 8, "JSP Globalization Support"

This chapter covers features for globalization support.

Appendix A, "Servlet and JSP Technical Background"

This appendix provides a brief background of servlet technology and introduces the standard JSP interfaces for translated pages.

Appendix B, "The Apache JServ Environment"

This appendix provides details for the JServ servlet 2.0 environment, including deployment, configuration, and special programming considerations.

Appendix C, "Third Party Licenses"

This appendix includes the Third Party License for third party products included with Oracle9i Application Server and discussed in this document.

Related Documentation

See the following additional OC4J documents available from the Oracle Java Platform group:

Also available from the Oracle Java Platform group:

The following documents are available from the Oracle9i Application Server group:

The following are available from the JDeveloper group:

The following documents from the Oracle Server Technologies group may also contain information of interest:

In North America, printed documentation is available for sale in the Oracle Store at 

http://oraclestore.oracle.com/

Customers in Europe, the Middle East, and Africa (EMEA) can purchase documentation from 

http://www.oraclebookshop.com/

Other customers can contact their Oracle representative to purchase printed documentation.

To download free release notes, installation documentation, white papers, or other collateral, please visit the Oracle Technology Network (OTN). You must register online before using OTN; registration is free and can be done at 

http://otn.oracle.com/admin/account/membership.html

If you already have a username and password for OTN, then you can go directly to the documentation section of the OTN Web site at 

http://otn.oracle.com/docs/index.htm

The following Oracle Technology Network (OTN) resources are available for further information about JavaServer Pages:

The following resources are available from Sun Microsystems:

Conventions

This section describes the conventions used in the text and code examples of this documentation set. It describes:

Conventions in Text

We use various conventions in text to help you more quickly identify special terms. The following table describes those conventions and provides examples of their use.

Convention Meaning Example

Italics

Italic typeface indicates book titles or emphasis, or terms that are defined in the text.

Oracle9i Database Concepts

Ensure that the recovery catalog and target database do not reside on the same disk.

UPPERCASE monospace (fixed-width) font

Uppercase monospace typeface indicates elements supplied by the system. Such elements include parameters, privileges, datatypes, RMAN keywords, SQL keywords, SQL*Plus or utility commands, packages and methods, as well as system-supplied column names, database objects and structures, usernames, and roles.

You can specify this clause only for a NUMBER column.

You can back up the database by using the BACKUP command.

Query the TABLE_NAME column in the USER_TABLES data dictionary view.

Use the DBMS_STATS.GENERATE_STATS procedure.

lowercase monospace (fixed-width) font

Lowercase monospace typeface indicates executables, filenames, directory names, and sample user-supplied elements. Such elements include computer and database names, net service names, and connect identifiers, as well as user-supplied database objects and structures, column names, packages and classes, usernames and roles, program units, and parameter values.

Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown.

Enter sqlplus to open SQL*Plus.

The password is specified in the orapwd file.

Back up the data files and control files in the /disk1/oracle/dbs directory.

The department_id, department_name, and location_id columns are in the hr.departments table.

Set the QUERY_REWRITE_ENABLED initialization parameter to true.

Connect as oe user.

The JRepUtil class implements these methods.

lowercase italic monospace (fixed-width) font

Lowercase italic monospace font represents place holders or variables.

You can specify the parallel_clause.

Run old_release.SQL where old_release refers to the release you installed prior to upgrading.

Conventions in Code Examples

Code examples illustrate SQL, PL/SQL, SQL*Plus, or other command-line statements. They are displayed in a monospace (fixed-width) font and separated from normal text as shown in this example: 

SELECT username FROM dba_users WHERE username = 'MIGRATE';

The following table describes typographic conventions used in code examples and provides examples of their use.

Convention Meaning Example

[ ]

Brackets enclose one or more optional items. Do not enter the brackets.

DECIMAL (digits [ , precision ])

|

A vertical bar represents a choice of two or more options within brackets or braces. Enter one of the options. Do not enter the vertical bar.

{ENABLE | DISABLE}

[COMPRESS | NOCOMPRESS]

...

Horizontal ellipsis points indicate either:

  • That we have omitted parts of the code that are not directly related to the example

  • That you can repeat a portion of the code

CREATE TABLE ... AS subquery;

SELECT col1, col2, ... , coln FROM employees;

Other notation

You must enter symbols other than brackets, braces, vertical bars, and ellipsis points as shown.

acctbal NUMBER(11,2);

acct CONSTANT NUMBER(4) := 3;

Italics

Italicized text indicates place holders or variables for which you must supply particular values.

CONNECT SYSTEM/system_password

DB_NAME = database_name

UPPERCASE

Uppercase typeface indicates elements supplied by the system. We show these terms in uppercase in order to distinguish them from terms you define. Unless terms appear in brackets, enter them in the order and with the spelling shown. However, because these terms are not case sensitive, you can enter them in lowercase.

SELECT last_name, employee_id FROM employees;

SELECT * FROM USER_TABLES;

DROP TABLE hr.employees;

lowercase

Lowercase typeface indicates programmatic elements that you supply. For example, lowercase indicates names of tables, columns, or files.

Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown.

SELECT last_name, employee_id FROM employees;

sqlplus hr/hr

CREATE USER mjones IDENTIFIED BY ty3MU9;

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