Download JSP Introduction

COMPUTING SUBJECT:
JSP Basics
TYPE:
Assignment
IDENTIFICATION:
JSP
COPYRIGHT:
Michael Claudius
LEVEL:
Easy
TIME CONSUMPTION:
2 hours
EXTENT:
50 lines
OBJECTIVE:
JSP expressions, scriptlets, declaration
PRECONDITIONS:
Core Servlets & JSP Ch. 10&11
COMMANDS:
IDENTIFICATION: JSP/MC
The Mission
You are to make a Web project based on some .jsp page files and a few Java classes in a related
package.
Useful links for this assignment
http://www..coreservlets.com Site for all kind of information
http://volume1.coreservlets.com/archive/index.html Code examples from the book
1. Create a Web project
In your favorite editor create a new project JSPProject of the category Web.
Choose the Category to Web and Web Application.
Look at Web Pages directory.
Notice that the index.jsp file is automatically created in the Web Pages directory.
This is where all the .jsp files will be placed.
In Source Package create a new package named “coreservlets”.
Activate index.jsp and compile and try to run it.
It will take some time as the web-server (Tomcat/GlassFish) now will be initialised.
First step first…
2.Understanding the compilation. . JSP/Servlet corespondence
Open windows explorer and in the project folder JSPProject. Then search for files with “index”.
In the name. Notice the index_jsp.java file.
Try to open it in a simple editor like TextPad
Look at the code and notice the method
_jspService(HttpServletRequest request, HttpServletResponse response)
What is the
request, response, session, out
used for ?
Where and what is the HTML code changed into ?
3. Downloading
You are now to use some predefined .jsp and .java files (Ch11 JSP Files.zip and Ch11 Java Files.zip)
which you can download from your teacher’s home page.
Unzip the .jsp files to the Web Pages folder.
Unzip the .java files to the coreservlets package.
Note: In the next assignments you are to compile run various programs but the most important is
that you try to understand the code; e.g. by answering the questions given.
4. JSP Expressions
Compile and run Expressions.jsp
What is the syntax for java expression?
5. JSP Scriptlets
Compile and run BGColor.jsp and DayWish.jsp
What is the syntax for Scriptlets?
How can a choice be made ?
What is scriptlets good for ?
5. JSP Declaration
Compile and run AccessCounts.jsp
What is the syntax for declarations ?
How can a variable be declared ?
What are declarations good for ?
6. Comparing JSP and Servlet
Compile and run ThreeParams.jsp
Try to fill out the request parameters:
http://localhost:8084/JSPProject/ThreeParams.jsp?param1=Mike&param2=is&param3=aBastard
Now compile and run a Java Servlet Class ThreeParams1.java.
Compile and run.
Take a good look at the differences in programming style.
Discuss…..