This document provides an overview of JavaServer Pages (JSP) through a series of lessons: - It defines JSP, Java servlets, and Enterprise JavaBeans (EJB), and compares JSP to other server-side programming environments. - It explains the basics of JSP syntax including expressions, scriptlets, declarations, and predefined variables. - It covers JSP directives like the page directive and include directive, and adding Java applets using the jsp:plugin element. - It discusses using JavaBeans in JSP through tags, conventions for constructing JavaBeans, and accessing JavaBeans via scripting elements. - It describes custom JSP tags and tag libraries, and

1. Copyright © 2002 ProsoftTraining. All rights reserved.
JavaServer Pages

2. Copyright © 2002 ProsoftTraining. All rights reserved.
Lesson 1:
Introduction to
JavaServer Pages

3. Objectives
• Define JavaServer Pages (JSP)
• Define Java servlets
• Define Enterprise JavaBeans (EJB)
• Compare JSP to other server-side
programming environments
• Explain the advantages of JSP
• Understand the mechanics of JSP documents
• Use basic JSP syntax
• Describe how to invoke JSP documents

4. What Is
Enterprise JavaBeans (EJB)?
• EJB = An architecture for deploying
component-based distributed applications
– J2EE-compliant application servers

5. What Are
Java Servlets?
• Java servlets provide the functionality of the
CGI for Java-driven Web applications
– Managed and executed on a Web server
that provides a servlet container
– Executed within a single JVM and server
process

6. What Is JSP?
• Server-side programming environment
– Contains normal HTML with special syntax
that allows dynamic content

7. Web Application Technologies
• Common Gateway Interface (CGI)
• Server extensions
• Server-side scripting
– ColdFusion
– PHP Hypertext Preprocessor (PHP)

8. JSP
Advantages and Mechanics
• Java = powerful programming language
– Built-in APIs
• JSP applications are portable
• JSP engine  locates the JSP document
• JSP engine  processes the JSP document
into a servlet
• JSP engine  passes control to servlet engine

9. Basic
JSP Syntax
• Script blocks
<% //Java code %>
• JSP files with comments
<%-- JSP comment --%>

10. Summary
 Define JavaServer Pages (JSP)
 Define Java servlets
 Define Enterprise JavaBeans (EJB)
 Compare JSP to other server-side
programming environments
 Explain the advantages of JSP
 Understand the mechanics of JSP documents
 Use basic JSP syntax
 Describe how to invoke JSP documents

11. Copyright © 2002 ProsoftTraining. All rights reserved.
Lesson 2:
JSP Fundamentals

12. Objectives
• Describe various styles of JSP syntax
• Use JSP expressions
• Use JSP scriptlets
• Use JSP declarations
• Use predefined variables

13. Evaluating
Java Expressions
• Syntax:
<%= new java.util.Date( ) %>

14. Using JSP Scriptlets
• Scriptlets allow you to:
– Perform complex operations within a JSP
document
– Intersperse blocks of Java code with
normal HTML

15. Using JSP Declarations
• JSP declarations:
– Provide a construct in which to declare
methods and variables
– Do not produce output
– Use the following syntax:
<%! //Java code %>

16. Using JSP
Predefined Variables
• The request variable
• The response variable
• The out variable
• The application variable
• The session variable
• The config variable
• The pageContext variable
• The page variable

17. Summary
 Describe various styles of JSP syntax
 Use JSP expressions
 Use JSP scriptlets
 Use JSP declarations
 Use predefined variables

18. Copyright © 2002 ProsoftTraining. All rights reserved.
Lesson 3:
JSP Directives

19. Objectives
• Define JSP directives
• Use the page directive
• Use page directive attributes
• Use the include directive
• Use the jsp:include element
• Add and manipulate Java applets in JSP files
using the jsp:plugin element

20. Introduction
to JSP Directives
• The page directive
– The import attribute
– The language attribute
– The contentType attribute
– The pageEncoding attribute
– The extends attribute
– The isThreadSafe attribute
– The session attribute
– The buffer attribute
– The autoFlush attribute
– The errorPage attribute
– The isErrorPage attribute
– The info attribute

21. Including
Files in JSP
• Using the include directive
• Using the jsp:include element

22. Using the
jsp:plugin Element
• The jsp:plugin element is used to:
– Add Java applets to JSP files
– Determine the appropriate tag for the client
browser accessing the JSP file

23. Summary
 Define JSP directives
 Use the page directive
 Use page directive attributes
 Use the include directive
 Use the jsp:include element
 Add and manipulate Java applets in JSP files
using the jsp:plugin element

24. Copyright © 2002 ProsoftTraining. All rights reserved.
Lesson 4:
JSP and JavaBeans

25. Objectives
• Define JavaBeans
• Explain the concept of component-centric
architecture
• Describe the advantages of JavaBeans
• Instantiate JavaBeans
• Use JSP-JavaBeans tags to access and
manipulate JavaBeans properties
• Explain the conventions for constructing
JavaBeans
• Use the serializable interface
• Access JavaBeans through scripting elements

26. Component-Centric
Architecture
• Component-centric architecture:
– Allows for handling complexity
– Divides complex systems into components

27. JavaBeans
Java
server
Database
server

28. JSP—JavaBeans Tags
Tag Description
<jsp:useBean> Used to instantiate a JavaBean
and create a reference to it
<jsp:getProperty> Used to access a JavaBean
property
<jsp:setProperty> Used to modify a JavaBean
property

29. Rules for
Constructing JavaBeans
• Class
• Constructor
• Property
• Methods
– Regular methods
– Access methods

30. The JavaBean
Serializable Interface
• When a JavaBean is serialized, its property
values are frozen
• To make the JavaBean serializable, it should
implement the Serializable interface

31. Accessing JavaBeans Through
Scriptlets and Expressions
• After the <jsp:useBean> tag instantiates a
JavaBean and has a reference to it, the
JavaBean can be used in scriptlets and
expressions throughout the scope of the
JavaBean

32. Summary
 Define JavaBeans
 Explain the concept of component-centric
architecture
 Describe the advantages of JavaBeans
 Instantiate JavaBeans
 Use JSP-JavaBeans tags to access and
manipulate JavaBeans properties
 Explain the conventions for constructing
JavaBeans
 Use the serializable interface
 Access JavaBeans through scripting elements

33. Copyright © 2002 ProsoftTraining. All rights reserved.
Lesson 5:
JSP Custom Tags
and Tag Libraries

34. Objectives
• Describe JSP custom tags
• Explain the need for JSP tag libraries
• Define and use the taglib directive
• Download, install and use a tag library
• Create custom handler classes and descriptor
files
• Create tag attributes
• Use a custom tag
• Deploy tag libraries

35. Why Use
Tag Libraries?
• Custom tag libraries:
– Allow you to create complex objects that
can be used by JSP developers
– Allow you to reuse code across multiple
JSP applications

36. Using
Custom Tags
• Using a tag library
– The number of pre-existing tag libraries is
growing

37. Creating JSP
Custom Tag Libraries
• Three steps to creating a custom tag:
– Define a tag handler class
– Define a tag library descriptor
– Define a JSP page that uses the custom tag
• The taglib directive

38. Using Custom
Tags in JSP Files
• Key elements of a custom tag:
– Tag name
– Attributes
– Nesting
– Body content

39. Tag Handlers

40. Tag
Library Descriptor
• Root element = <taglib>
• Subelements = tlibversion
shortname
info
• Deploying tag libraries

41. Summary
 Describe JSP custom tags
 Explain the need for JSP tag libraries
 Define and use the taglib directive
 Download, install and use a tag library
 Create custom handler classes and descriptor
files
 Create tag attributes
 Use a custom tag
 Deploy tag libraries

42. Copyright © 2002 ProsoftTraining. All rights reserved.
Lesson 6:
JSP and Java Servlets

43. Objectives
• Define servlets
• Write simple servlets
• Discuss the difference between servlets and
JSPs
• Explain the concept of MVC design pattern
• Describe the layers of MVC design pattern
• Explain Models 1 and 2 Web application designs
• Define the RequestDispatcher interface
• Use the RequestDispatcher to dispatch
requests

44. Servlets
• Java servlets = Java classes that implement
the javax.servlet.Servlet interface
• Servlets have no main method for handling
requests
– Using the GET method

45. Servlets vs. JSP
• Manageability problems with servlets
• How can JSP help?

46. Web
Application Architecture
• Presentation layer
• Application layer
• Control layer

47. MVC
Design Pattern

48. JSP vs. Servlet Architecture
• Model 1 architecture
• Model 2 architecture
• Model 1 and Model 2 architecture trade-offs

49. Model 1
Architecture

50. Model 2
Architecture

51. Page-Centric Design

52. Servlet-Centric Design

53. Controlling the Flow
with RequestDispatcher
• Acquiring a RequestDispatcher object
• Using the RequestDispatcher object
• Where to place the servlets
• Incorporating another resource's output in a
servlet
• Forwarding a request from a JSP to other
resources

54. Summary
 Define servlets
 Write simple servlets
 Discuss the difference between servlets and
JSPs
 Explain the concept of MVC design pattern
 Describe the layers of MVC design pattern
 Explain Models 1 and 2 Web application
designs
 Define the RequestDispatcher interface
 Use the RequestDispatcher to dispatch
requests

55. Copyright © 2002 ProsoftTraining. All rights reserved.
Lesson 7:
JSP,
HTML Forms and Databases

56. Objectives
• Describe the tiers in a three-tier distributed
application
• Discuss a Web communication between tiers
• Use HTML forms and their input elements
• Use the request object to communicate
between HTML forms and JSP files
• Explain the concept of relational databases
• Use the main SQL statements
• Describe Java Database Connectivity
• Connect to a database and access information
• Create an example of an HTML form

57. Distributed
Multi-Tiered Applications
• Client tier
• Server tier
• Database tier

58. Steps in a
Typical Web Communication
http://java.sun.com/getjava/download.html
Hypertext
Transfer
Protocol
Host name
Path name

59. HTML Forms
• Text field input
• Radio button input
• Check box input
• Drop-down menu input
• Reset and
submit buttons

60. Request Object
• Contains:
– Methods for storing and retrieving attribute
values
– Methods for accessing request parameters
– Methods for retrieving request headers
– Methods for other uses

61. Relational
Databases
• Database Management System (DBMS)
• Queries

62. Structured
Query Language (SQL)
• Data Definition Language (DDL)
• Data Manipulation Language (DML)
• Data Control Language (DCL)

63. Java Database
Connectivity (JDBC)
• Load a JDBC driver
• Connect to a database
• Execute SQL statements
• Disconnect from a database

64. Summary
 Describe the tiers in a three-tier distributed
application
 Discuss a Web communication between tiers
 Use HTML forms and their input elements
 Use the request object to communicate
between HTML forms and JSP files
 Explain the concept of relational databases
 Use the main SQL statements
 Describe Java Database Connectivity
 Connect to a database and access information
 Create an example of an HTML form

65. JavaServer Pages
 Introduction to JavaServer Pages
 JSP Fundamentals
 JSP Directives
 JSP and JavaBeans
 JSP Custom Tags and Tag Libraries
 JSP and Java Servlets
 JSP, HTML Forms and Databases