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

jing ma

Joined: Jun 22, 2011
Posts: 10
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 source file is in C:\Users\myname\Documents\JSP\MyProject\beerV1\src\com\example\web
the source file is in C:\Users\myname\Documents\JSP\MyProject\beerV1\src\com\example\model

the code of

the code of 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
it comiled and generated the BeerExpert.class under directory C:\Users\myname\Documents\JSP\MyProject\beerV1\classes\com\example\model

when I try to compile the it can not import package com.example.model.BeerExpert.class Here is my commandline to compile
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

Frits Walraven
Creator of Enthuware JWS+ V6
Saloon Keeper

Joined: Apr 07, 2010
Posts: 1999


Try to follow these instructions: HowToCreateWebApplicationWithoutAnIDE.

Ryan Wilson
Ranch Hand

Joined: Apr 16, 2003
Posts: 65

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\

The separator for the classPath on windows is ';' you had a ':'
jimme van der meer

Joined: Nov 15, 2013
Posts: 2
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 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
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