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Head first servlets and JSP - Hands on MVC exercise - help!

Matt Richardson
Greenhorn

Joined: Oct 07, 2004
Posts: 4
Hi there,

I'm trying to work through Head First Servlets and JSP but I'm stuck on the hands-on MVC exercise in chapter 3.

I'm trying to compile the first version of the controller servlet using javac. I have set up the classpath correctly but the servlet is failing with syntax errors. I am unable to see all of these, because they are scrolling off the top of my msdos command window (I know, I should probably use Linux), but it looks rather like the problems start with the import statements. I suspect that the servlet-api.jar file is not being found.

The javac command I am using is

javac -classpath C:\tomcat\common\lib\servlet-api.jar:classes:. -d classes src\com\example\web\BeerSelect.java

I'm sure the path is right

I have also tried - which is what the jar file looks like under a msdos dir command:

javac -classpath C:\tomcat\common\lib\SERVLE~1.JAR:classes:. -d classes src\com\example\web\BeerSelect.java

I can see my servlet-api.jar file under this directory

My source code file is as follows (in case there is actually something wrong with that)

package com.example.web;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class BeerSelect extends HttpServlet {

public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {

response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("Beer Selection Advice<br>");
String c = request.getParameter("color");
out.println("<br>Got beer color " + c);
}
}

Please can anyone help otherwise I risk getting certified in an entirely different sense?

Thanks,

Matt
Matt Richardson
Greenhorn

Joined: Oct 07, 2004
Posts: 4
I think I've managed to compile my servlet - I used the command

javac -classpath C:\tomcat\common\lib\servlet-api.jar -d classes C:\Matt\Java\projects\beerv1\src\com\example\web\BeerSelect.java

and took out the ':classes:.' part after servlet-api.jar that was in the book - presumably that must be some unix/linux specific syntax?

Thanks
M Rama
Ranch Hand

Joined: Mar 04, 2005
Posts: 91
Your class path should've been the following:

javac -classpath C:/Tomcat5.5/common/lib/servlet-api.jar;classes;. -d classes src/com/example/web/BeerSelect.java

you got colons instead of semicolons...
Matt Richardson
Greenhorn

Joined: Oct 07, 2004
Posts: 4
Thanks for your help - this is in error in the 2004 version of the book (not sure whether this is the latest edition).

Regards,

Matt
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Head first servlets and JSP - Hands on MVC exercise - help!