javac compile import package BeerSelect.java:3: error: package com.example.model does not exist

[jing ma]

I am working on the Head Servlet&JSP book projects. I can not recognize import packages and can not compile.
can anyone so kindly help me about this? I google online about the classpath. but I might misunderstand it. Please help me about this Thanks!

There is a problem about javac compiling. Here is my development directory structure
project directory C:\Users\myname\Documents\JSP\MyProject\beerV1
under beerV1 I followed the book,
the BeerSelect.java source file is in C:\Users\myname\Documents\JSP\MyProject\beerV1\src\com\example\web
the BeerExpert.java source file is in C:\Users\myname\Documents\JSP\MyProject\beerV1\src\com\example\model

the code of BeerSelect.java

package com.example.web;
import com.example.model.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.Iterator;
import java.util.List;


public class BeerSelect extends HttpServlet {
	public void doPost(HttpServletRequest request, 
			HttpServletResponse response)
			throws IOException, ServletException {
		String c = request.getParameter("color");
		BeerExpert be = new BeerExpert();
		List<E> result = be.getBrands(c);
		
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out.println("Beer Selection Advice<br>");
		
		Iterator<E> it = result.iterator();
		while(it.hasNext()){
			out.print("<br>try: " + it.next());
		}
	}
}

the code of BeerExpert.java compiled with commandline under windows7:
C:\Users\myname\Documents\JSP\MyProject\beerV1\src\com\example\model> javac -classpath C:\tools\tomcat\lib\servlet-api.jar -d C:\Users\myname\Documents\JSP\MyProject\beerV1\classes BeerExpert.java
it comiled and generated the BeerExpert.class under directory C:\Users\myname\Documents\JSP\MyProject\beerV1\classes\com\example\model

package com.example.model;
import java.util.*;

public class BeerExpert{
	//public List getBrands(String color){
		//List brands = new ArrayList();
		//if (color.equals("amber")){
			brands.add("Jack Amber");
			brands.add("Red Moose");
		}else{
			brands.add("Jail Pale Ale");
			brands.add("Gout Stout");
		}
		return(brands);
	}
}

when I try to compile the BeerSelect.java it can not import package com.example.model.BeerExpert.class Here is my commandline to compile BeerSelect.java
C:\Users\myname\Documents\JSP\MyProject\beerV1\src\com\example\web> javac -classpath C:\tools\tomcat\lib\servlet-api.jar; C:\Users\myname\Documents\JSP\MyProject\beerV1\classes\com\example\model\*.class:. -d C:\Users\myname\Documents\JSP\MyProject\beerV1\classes BeerExpert.java

[Frits Walraven]

Hi

Try to follow these instructions: HowToCreateWebApplicationWithoutAnIDE.

Regards,
Frits

[Ryan Wilson]

Try:

C:\Users\myname\Documents\JSP\MyProject\beerV1> javac -classpath C:\tools\tomcat\lib\servlet-api.jar;classes;. -d C:\Users\myname\Documents\JSP\MyProject\beerV1\classes src\com\example\web\BeerExpert.java

The separator for the classPath on windows is ';' you had a ':'

[jimme van der meer]

For the people that still run into the same problem, just like me today... There is an even easier solution:

- make a new class in eclipse with the exact same package and class name.
- save the BeerSelect.java class in eclipse and locate it in your eclipse workspace which was for me C:\Users\VDM\Desktop\workspaceLaptop\DemoJSP\build\classes\com\example\web\BeerSelect.class
- copy that class to your deployment environment for me C:\apache-tomcat-7.0.47\webapps\Beer-v1\WEB-INF\classes\com\example\web

And you're done.. The cool thing about eclipse is that it automatically compiles the .java to .class for you without these (complicated) cmd commands.
You can probably do it with any java compiler that automatically generates .class files, just make sure you use the same package and class name as they ask in the book