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  1. 1. 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
  2. 2. Introduction to Java Web Development
  3. 3. Introduction to Java Web Development • Java Enterprise Edition • Java Web Development • Structure of a web project • Introduction to Web Applications • The first project
  4. 4. Java Enterprise Edition
  5. 5. Java Web Development * Note In this course only JSP & servlets will be discussed
  6. 6. 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
  7. 7. Structure of a web project in the server
  8. 8. 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.
  9. 9. 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.
  10. 10. Introduction to Web Applications
  11. 11. 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.
  12. 12. Servlets versus JSP
  13. 13. Life Cycle of a JEE Web Application
  14. 14. Life Cycle of a JEE Web Application
  15. 15. Criteria to develop web applications
  16. 16. Exercise 1 • Develope the first java web application 1. Download the file: 1. Unzip it 2. Import from Eclipse 3. Run it
  17. 17. Exercise 1 Results • You should get this result
  18. 18. Exercise 1 Analisis • The web.xml file <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="" . . . 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>
  19. 19. 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>
  20. 20. Exercise 1 Analisis Servlet classes (other might be here classes too) Other resources might be here