CS381 - Lab Session 5 
 
 
 
A. Creating a ‘Hello world’ servlet 
 
1. Using “nedit” or “notepad” or your tool of choice, create the following servlet: 
 
package webtech; 
 
import java.io.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
 
/** a simple servlet */ 
 
public class HelloWorld extends HttpServlet { 
 
  public void doGet(HttpServletRequest request, 
                    HttpServletResponse response) 
     throws ServletException, IOException { 
 
    response.setContentType(“text/html”); 
    PrintWriter out = response.getWriter(); 
    String docType =  
      “\n”; 
    out.println(docType + 
      “\n” + 
      “\n” + 
“
Hello world
\n” + 
“”); 
  } 
} 
 
2. Save as HelloWorld.java within the appropriate directory,  
      (i.e. tomcat/webapps/webtech/WEB-INF/classes/webtech) 
3. Compile the servlet you just created                                                                          
(i.e. cd into tomcat/webapps/webtech/WEB-INF/classes and then run javac 
webtech/HelloWorld.java) 
4. Open the page in your browser (e.g. 
http://workstation01.ee.surrey.ac.uk:49999/webtech/servlet/webtech.HelloWor
ld) 
 
 
 
 
B. Reading three parameters 
 
1. Using “nedit” or “notepad” or your tool of choice, create a new text file, and 
add the required HTML elements (you could use the following HTML file). 
 
 
 
 
Collecting three parameters
 
 
 
First Parameter: 
 
Second Parameter: 
 
 Third Parameter: 
 
  
  
 
  
 
2. Save as ThreeParams.html in the appropriate directory (i.e. 
tomcat/webapps/webtech) 
3. Create a servlet called ThreeParams.java that reads the form parameters 
param1, param2 and param3 and places their values in a bulleted list  
4. Use request.getParameter(“param1”) to read the first parameter. 
Similarly, for the other two. 
5. Display the values of the three parameters in the HTML page, using the 
out.println() method. 
6. Compile the servlet you just created                                                                          
(i.e. cd into tomcat/webapps/webtech/WEB-INF/classes  
             and then run javac webtech/ThreeParams.java 
7. Open the page in your browser (e.g. 
http://workstation01.ee.surrey.ac.uk:49999/webtech/ThreeParams.html)