2. Servlet / JSP course topics
• Chapter 0 Introduction to Java Web Development
• Chapter 1 Introduction to servlets
• Chapter 2 Introduction to JavaServer Pages
• Chapter 3 How to use the MVC pattern in a Java Web Application
• Chapter 4 How to share information in servlets and JSPs
• Chapter 5 Advanced JSP concepts
• Chapter 6 How to use JavaBeans with JSP
• Chapter 7 How to use the JSP Expression Language (EL)
• Chapter 8 How to use the JSP Standard Tag Library (JSTL)
• Chapter 9 How to use custom JSP tags
• Chapter 10 How to access databases in java web applications
• Chapter 11 How to use JavaMail to send email
• Chapter 12 How to secure java web applications
• Chapter 13 How to download files with Servlets
• Chapter 14 How to work with listeners
• Chapter 15 How to work with filters

3. Introduction to
Java Web Development

4. Introduction to Java Web
Development
• Java Enterprise Edition
• Java Web Development
• Structure of a web project
• Introduction to Web Applications
• The first project

5. Java Enterprise Edition

6. Java Web Development
* Note
In this course only JSP & servlets will be discussed

7. Structure of a web project
• There are two kind of structures
– The structure of the web application in a server
– The structure of the IDE
• A web project have three main elements
– The JSPs files
– The java classes
– The Configuration file web.xml

8. Structure of a web project
in the server

9. Structure of a web project
in the server
Root of the project
Java classes (.class)
Java Libraries (.jar)
Configuration files
Anything web-related
- Directories
- JavaServer Pages (JSP)
- HTML
- Css files
- JavaScript Files
- Etc.

10. Introduction to Web Applications
• In a Web Application, web components provide the dynamic
extension capabilities for a web server.
• Web components can be Java servlets, JSP pages, or web
service endpoints.
• The interaction between a web client and a web application is
explained and illustrated in the next slide figure.
– The client sends an HTTP request to the web server.
– A web server that implements Java Servlet and JavaServer Pages
technology converts the request into an HTTPServletRequest object.
– This object is delivered to a web component, which can interact with
JavaBeans components or a database to generate dynamic content.
– The web component can then generate an HTTPServletResponse or it
can pass the request to another web component.
– Eventually a web component generates a HTTPServletResponse
object. The web server converts this object to an HTTP response and
returns it to the client.

11. Introduction to Web Applications

12. Introduction to Web Applications
• Servlets are Java programming language classes that
dynamically process requests and construct responses.
• JSP pages are text-based documents that execute as servlets
but allow a more natural approach to creating static content.
• Although servlets and JSP pages can be used interchangeably,
each has its own strengths.
• Servlets are best suited for service-oriented applications (web
service endpoints are implemented as servlets) and the
control functions of a presentation-oriented application, such
as dispatching requests and handling nontextual data.
• JSP pages are more appropriate for generating text-based
markup such as HTML, Scalable Vector Graphics (SVG),
Wireless Markup Language (WML), and XML.

13. Servlets versus JSP

14. Life Cycle of a
JEE Web Application

15. Life Cycle of a
JEE Web Application

16. Criteria to develop web applications

17. Exercise 1
• Develope the first java web
application
1. Download the file:
jspservlet-00.zip
1. Unzip it
2. Import from Eclipse
3. Run it

18. Exercise 1
Results
• You should get this result

19. Exercise 1
Analisis
• The web.xml file
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" . . . version="2.5">
<servlet>
<display-name>HelloWorldServlet</display-name>
<servlet-name>HelloWorldServlet</servlet-name>
<servlet-class>
com.example.servlets.HelloWorldServlet
</servlet-class>
</servlet> Servlet
<servlet> declarations
<display-name>AnotherServlet</display-name>
<servlet-name>AnotherServlet</servlet-name>
<servlet-class>
com.example.servlets.AnotherServlet
</servlet-class>
</servlet>

20. Exercise 1
Analisis
• The web.xml file
. . .
<servlet-mapping>
<servlet-name>HelloWorldServlet</servlet-name>
<url-pattern>/HelloWorldServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>AnotherServlet</servlet-name> Servlet
<url-pattern>/AnotherServlet</url-pattern> mappings
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>

21. Exercise 1
Analisis
Servlet classes
(other might be here classes too)
Other resources might be here