Web Programming in Java Java Servlet and JSP Programming
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China Jiliang University Java Web Programming in Java Java Servlet and JSP Programming Structure and Deployment China Jiliang University Java Web Applications, Helmut Dispert China Jiliang University Servlet/JSP Exercise - Rules On the following pages you will find the rules and conventions for naming and deployment of your servlet and jsp files. Very important: • Go directly to your directories (number "nn") and work only in these directories! • Do not enter other directories! This is strictly forbidden Java Web Applications, Helmut Dispert China Jiliang University Servlet Exercise Compiling Servlets: Directory Structure (example) package jiliang.student_nn; jiliang import java.io.*; import javax.servlet.*; student_nn import javax.servlet.http.*; import java.net.*; jiliang.student_nn import java.util.*; // Example for student_nn public class Servletstudent_nn extends HttpServlet { Servlet API: servlet-api-5.0.18.jar or servlet-api-2.4.jar javac -target 1.5 Servletstudent_nn.java Compile for Java (Tomcat) 5.5 Java Web Applications, Helmut Dispert China Jiliang University Servlet JAR Java Servlet Archive File: A copy of the file "servlet-api-2.4.jar" can be found in the directory "servlet_jar" Java Web Applications, Helmut Dispert China Jiliang University Servlet Exercise Servlet Home directories URL of the Jakarta-Tomcat Server: 10.132.10.91:8180 Directory for Servlets: $TOMCAT_WEBAPPS/student-servlet/WEB-INF/classes/jiliang/student_nn URLs (Servlets): http://10.132.10.91:8180/student-servlet/servlet/servlet_name http://10.132.10.91:8180/ student-servlet/servlet/jiliang.student_nn.Servletstudent_nn jiliang.student_nn.Servletstudent_nn Access via FTP: Server-IP: 10.132.10.91, Port: 21 User: newhelm, Passwd: 123 Info: http://10.132.10.91:8180/student-servlet/ Java Web Applications, Helmut Dispert China Jiliang University Servlet Exercise - Naming Summary - Your Servlet: Getting to your directory: ĺ student-servlet ĺ WEB-INF ĺ classes ĺ jiliang ĺ student_nn Naming your Servlet: Servletstudent_nn.java nn: this is your number Important: Use only this name! Java Web Applications, Helmut Dispert China Jiliang University Servlet Exercise - Example Source Code - Example: http://10.132.10.91:8180/student-servlet/Servletstudent_00.html Java Web Applications, Helmut Dispert China Jiliang University JSP Exercise JSP Home directories URL of the Jakarta-Tomcat Server: 10.132.10.91:8180 Directory for JSP: $TOMCAT_WEBAPPS/student-jsp/jsp/jiliang/student_nn URLs (JSPs): http://10.132.10.91:8180/ student-jsp/jsp/jiliang/student_nn/index.jsp Access via FTP: Server-IP: 10.132.10.91, Port: 21 User: newhelm, Passwd: 123 Java Web Applications, Helmut Dispert China Jiliang University JSP Exercise - Naming Summary - Your JSP: Getting to your directory: ĺ student-jsp ĺ jsp ĺ jiliang ĺ student_nn Naming your JSP: *.jsp, *.html nn: this is your number Important: No restrictions on names. Java Web Applications, Helmut Dispert China Jiliang University Servlet Exercise Compiling the servlet using the Jakarta Servlet-API: a) Download the Servlet-API file "servlet.jar". b) Install the file in the following directory: "C:\Programs\jdk_dir\jre\lib\ext\" (with jdk_dir = JDK-directory, e.g. "jdk1.3.0_02"). c) Set the classpath (e.g. using a batch file): set CLASSPATH= C:\Programs\jdk_dir\jre\lib\ext\servlet.jar d) Compile the servlet as usual: javac filename.java Java Web Applications, Helmut Dispert China Jiliang University Servlet Exercise User handling during an e-commerce session Write a Java Servlet that fulfils the following functions: New customer: § Welcome this visitor with the message "Welcome to our shop" (or similar). § Offer a form (HTML) to register this new customer asking for the necessary information. Minimum input should be: Ø first name, last name and address; Ø preferred product line (using the shop); allow at least four different categories. § The client sends an HTTP POST request with the complete set of data from this HTML form. Java Web Applications, Helmut Dispert China Jiliang University Servlet Exercise Echo the accepted data back to the client in the form of an HTML table. The user (client) should receive a non-editable version of the updated information. Known (old) customer: § Welcome this visitor with the message "Welcome 'first name' 'last name' " followed by basic information about former visits to the shop, like: Ø last visit, Ø number of visits (since), Ø session ID, … Focused advertising: § Send to the known visitor customer-oriented advertisements (banner, e.g. appropriate images that are opened in a separate small window). Java Web Applications, Helmut Dispert.