Ta Javaserverside Eran Toch

Tutorial: Server-Side Web Applications with Java, JSP and Tomcat Eran Toch December 2004 Methodologies in Information Systems Development

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Web Application vs. Web Site Web Site Web Application

The Difference – cont’d ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Java Web Application Architecture JSP Application Server Browser Servlet Java Classes / EJB HTTP / HTML DB / ERP / Legacy

Tomcat Installation ,[object Object],[object Object],[object Object],[object Object]

Tomcat and Java 5 ,[object Object],[object Object]

Tomcat Installation – cont’d If you want Tomcat to startup every time the computer is rebooted, check the “service” option. If you wish to use Tomcat for only for development, it’s best to leave the service option unchecked.

Tomcat Installation - Port You can configure the port that Tomcat will be using. If you want it to be available publicly (behind firewalls etc), change the default port to 80. Otherwise, leave it as it is (880). You can always change it later, in the [TOMCAT_HOME]/conf/server.xml configuration file.

Running Tomcat ,[object Object],[object Object],[object Object]

Managing Tomcat ,[object Object],[object Object],[object Object]

Managing Tomcat Console Web Application management Number of current sessions Start, stop, restart and un-deploy applications

Building A Web Application ,[object Object],Tomcat-home conf common webapps ... phones WEB-INF lib classes jsp This is the hard way… There are better

Creating JSP Project in Eclipse ,[object Object],[object Object]

Creating JSP Project – cont’d ,[object Object],[object Object]

Creating Java Classes Project ,[object Object],[object Object]

Creating Java Project – cont’d ,[object Object]

Creating Java Project – cont’d ,[object Object],[object Object]

Better ways ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Our “Phones” Application ,[object Object],[object Object],select_entry.jsp display_phone.jsp PhoneEntry.java DBConnector.java Database

PhoneEntry.java package edu.technion.methodologies.phones ; public class PhoneEntry { private int id = 0 ; private String name ; private String phone ; private String email ; public void load(int id ) { DBConnector.loadPhone(id, this ); } public void save () { if (id == 0 ) { id = DBConnector.insertPhone(this ); } else { DBConnector.updatePhone(id, this ); } } //getters and setters… }

DBConnector.java ,[object Object]

Writing Scriplets in JSP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JSP Scripting Elements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JSP Directives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

select_entry.jsp ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],HTML Header HTML form Nested HTML table structure HTML text input

select_entry.jsp – the HTML output

display_phone.jsp <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <%@ page import = "edu.technion.methodologies.phones.*" %> <HTML> <HEAD> <TITLE> Phone Entry </TITLE> </HEAD> <BODY> <% String idParam = request.getParameter( "id" ); int id = 0; if (idParam != null ){ id = Integer.parseInt(idParam); } PhoneEntry phoneEntry = new PhoneEntry(); phoneEntry.load(id); %> Handling the request Creating the JavaBean Importing libraries

display_phone.jsp – cont’d ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

display_phone.jsp – the HTML Output

JSP Include ,[object Object],<table border = "0" width = "100%" cellpadding = "4" > <tr bgcolor = "99CCFF" > <td><a href = "select_entry.jsp" > home </a></td> </tr> </table> Included JSP file

JSP Include – cont’d … <BODY> <%@ include file = "header.jsp" %> <% … We add the include declarative into display_phone.jsp And we get:

Session and Application Objects ,[object Object],[object Object],[object Object],[object Object],//Setting an object within the session session.setAttribute( "last_searched_id" , new Integer(id)); //Getting an object from the session Integer lastID = (Integer)session.getAttribute( "last_searched_id" ); out.println(lastID);

Advanced Issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Model 2 Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Model 2 Architecture – cont’d .jsp .jsp Form request forward Database classes servlet VIEW CONTROLLER MODEL

Struts ,[object Object],[object Object],[object Object]

References ,[object Object],[object Object],[object Object],[object Object]

Ta Javaserverside Eran Toch

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