Web development with Java Server Pages (JSP) and Servlets

1
Web developmentwith Java Server Pages (JSP) and
Servlets

• Julien Thibault / Phil Brewster / Kristina
  Doing-Harris
• Julien.thibault_at_utah.edu

2
Web development

• Web development includes
• web design, web content development, client
  liaison, client-side/server-side scripting, web
  server and network security configuration,
  e-commerce
• Limitations of static HTML
• HTML only structures data (text, pictures, media)
  for rendering in the browser
• The hosting web server just send the HTML file as
  is to the user
• Does not natively offers ways to interface with
  data sources (e.g. Databases)
• Dynamic web through server-side code
• A web server dynamically generates a web page
  based on the user request
• The users request is processed on the
  server-side, and HTML is generated accordingly to
  represent the response, then finally sent back to
  the user.
• Many technologies and languages available
• Microsoft .NET, Java Server Pages
• CGI, PHP, ColdFusion

3
Java Server Pages and Servlets

• Java Servlets
• Java Classes used to process HTTP requests
• Hosted by the web server (typically Apache
  Tomcat)
• Good technology choice if you want to reuse
  existing Java libraries
• Java Server Pages (JSP)
• Java technology used to embed server-side code
  directly into the web page
• When the JSP pages are deployed, the server
  compiles them and creates the corresponding
  Servlets.
• JSP example
• Server-side code is surrounded by the lt and gt
  tags

lthtmlgt ltheadgtHello world testlt/headgt ltbodygt
Hello World! lt new java.util.Date() gt
lt/bodygt lt/htmlgt
4
Using JSP in Eclipse JEE

• Open Eclipse JEE and create a new Dynamic Web
  Project (e.g. helloproject)
• The project should include the following folders
• Java Resources/src/ where you put your Java
  classes (including servlets)
• WebContent/ where you put your web pages
  (html/jsp), and other web content (pictures, CSS)
• WebContent/WEB-INF/lib where you put your Java
  libraries (jar files)
• To create a new JSP page
• Right-click on WebContent/ -gt New -gt JSP file
  (e.g. create hello.jsp from previous slide)
• To create a new Servlet
• Right-click on JavaResources/src/ folder -gt New
  -gt Servlet
• To deploy your web application
• Right-click on the project folder -gt Export -gt
  WAR file
• Destination the webapps/ folder of your Apache
  Tomcat install (e.g. C\Program Files\Apache
  Software Foundation\Tomcat 5.5\webapps\)
• The project will be packaged into a WAR file (Web
  application ARchive) and deployed onto the server
• Now you should be able to access you web app at
  http//localhost8080/helloproject/hello.jsp

5
Use CHPC to host your JSP page

• Connecting to CHPC
• Host sanddunearch.chpc.utah.edu
• Login uNID
• Password uNID password
• Hosting your JSP pages
• 1. Create a public_jsp folder in your home
  directory
• 2. Copy your web page to that folder (scp command
  or WinSCP)
• 3. Now you can access your webpage at
• http//webapps.chpc.utah.edu/uNID/page_name
• Ex http//webapps.chpc.utah.edu/u0668260/index.j
  sp
• Note if you just copy the WAR file to that
  folder, it might take a few minutes to actually
  deploy.

6
JSP tutorials