Getting package and class exceptions with the BeerAcvice web app!!! Pls Help

[vishwak rajgopalan]

Hello,
I am not sure whether this is the appropriate forum to post this. Please excuse me if I have made an error. I have been using HeadFirst Servlets and JSP and I compiled the BeerSelect.java code (the second version of the controller servlet).
I get the following error message saying that the package com.example.model does not exist. Please help me as I am unsure how to proceed with debugging this issue. I have pasted the error message below


D:\MyProjects\beerV1>javac -d classes src/com/example/web/BeerSelect.java
src/com/example/web/BeerSelect.java:20: cannot access src.com.example.model.BeerExpert
bad class file: .\src\com\example\model\BeerExpert.java
file does not contain class src.com.example.model.BeerExpert
Please remove or make sure it appears in the correct subdirectory of the classpath.
BeerExpert be = new BeerExpert();

Thanks,
Vishwak

[Steven Hoodless]

Maybe my useful batch file compile.bat might point you in the right direction.

Steven

 
rem Set CLASSPATH
rem =============
 
set CLASSPATH=.;C:\MyProjects\beer-v1;classes;c:\jakarta-tomcat-5.0.28\common\lib\servlet-api.jar;jakarta-tomcat-5.0.28\common\lib\jsp-api.jar;
 
rem Compile
rem =======
javac -d classes src\com\example\web\BeerSelect.java
javac -d classes src\com\example\model\BeerExpert.java
 
rem Move objects into place
rem =======================
 
echo Copying objects from development to TOMCAT
 
@echo on
copy web\result.jsp c:\jakarta-tomcat-5.0.28\webapps\Beer-v1\result.jsp
copy web\form.html c:\jakarta-tomcat-5.0.28\webapps\Beer-v1\form.html
copy classes\com\example\web\BeerSelect.class c:\jakarta-tomcat-5.0.28\webapps\Beer-v1\WEB-INF\classes\com\example\web\BeerSelect.class
copy classes\com\example\model\BeerExpert.class c:\jakarta-tomcat-5.0.28\webapps\Beer-v1\WEB-INF\classes\com\example\model\BeerExpert.class
@echo off
 
rem restart TOMCAT
rem ==============
 
rem blank line
echo. 
echo Stopping Tomcat
rem blank line
echo. 
 
cd   C:\jakarta-tomcat-5.0.28\bin
call C:\jakarta-tomcat-5.0.28\bin\shutdown.bat
 
rem blank line
echo. 
echo Press any key when TOMCAT is closed down
pause
 
rem blank line
echo. 
echo Restarting Tomcat
rem blank line
echo. 
 
call C:\jakarta-tomcat-5.0.28\bin\startup.bat
 
rem blank line
echo. 
 
cd   C:\MyProjects\beer-v1
echo try Inet Address "http://localhost:8080/Beer-v1/form.html"
rem blank line
echo.  

[Vengan Krish]

Try this: (file separator is "\" instead of "/")
D:\MyProjects\beerV1>javac -d classes src\com\example\web\BeerSelect.java

Regards

[Vengan Krish]

I guess some mistach with your directory structure. if you haven't figured it yet, paste your development directory structure here.

regards

[Mo Dulloo]

Had the same problem and Steven's bat file does hold a hint to the problem.
I had coded it char for char out of the book on a windows system and the main problem I had was the underlined bit below:

javac -classpath .... servlet-api.jar:classes:. -d classes ...
----------

It's the colons either side - I initially resorted to ermoving the section from the compile instruction but ran into trouble when trying to compile the second servlet.
From Steven's bat file - I tried semi-colons and with a little reading up that was the trick!

Maybe one for the errata - anyone else had this issue?

I hope this solves it for you.

Mo

SCJP 1.4

[Mo Dulloo]

Hmmm, underlined bit does not come out too well above, it's the:

:classes:.

bit that was supposed to be underlined.

Cheers

Mo

SCJP 1.4

[sergio mendez-rueda]

hi,
this is my AntFile for the beer app.(Tomcat and Resin app-Servers)
<?xml version="1.0"?>
<!-- Author S mendez-rueda -->
<project name="beerApp development" default="compileSrc" basedir=".">

<!-- the name of the wep application -->
<property name="app.name" value="beerApp"/>
<!-- =================================================================== -->
<!-- properties reflecting the directory structur of the web application-->
<!-- development -->
<!-- =================================================================== -->

<property file="${basedir}/build.properties"/>
<property name="src" location="${basedir}/src"/>
<property name="src.web" location="${src}/com/example/web"/>
<property name="src.model" location="${src}/com/example/model"/>
<property name="etc" location="${basedir}/etc"/>
<property name="lib" location="${basedir}/lib"/>
<property name="web" location="${basedir}/web"/>
<property name="classes" location="${basedir}/classes"/>

<!-- =================================================================== -->
<!-- properties reflecting the directory structur of the web application-->
<!-- tomcat deployement -->
<!-- =================================================================== -->

<property name="tomDeployDir" location="${tomcat.server}/${app.name}"/>
<property name="tomLibDir" location="${tomcat.server}/${app.name}/lib"/>
<property name="tomClassDir" location="${tomcat.server}/${app.name}/WEB-INF/classes"/>

<!-- =================================================================== -->
<!-- properties reflecting the directory structur of the web application-->
<!-- Resin deployement -->
<!-- =================================================================== -->

<property name="resinDeployDir" location="${resin.server}/${app.name}"/>
<property name="resinLibDir" location="${resin.server}/${app.name}/lib"/>
<property name="resinClassDir" location="${resin.server}/${app.name}/WEB-INF/classes"/>

<!-- =================================================================== -->
<!-- Set class path for the build -->
<!-- =================================================================== -->

<path id="build.classpath">
<!-- <path refid="client.classpath"/> -->

<fileset dir="${tomcat.home}/common/lib/">
<include name="servlet-api.jar"/>
<include name="jsp-api.jar"/>
</fileset>
<fileset dir="${tomcat.home}/webapps/coreServlets/WEB-INF/lib/">
<include name="commons-beanutils-bean-collections.jar"/>
<include name="commons-beanutils-core.jar"/>
<include name="commons-beanutils.jar"/>
</fileset>
</path>

<!-- =================================================================== -->
<!-- Create the file and directory structure of the web app -->
<!-- =================================================================== -->

<target name="init">
<mkdir dir="${src}"/>
<mkdir dir="${src.web}"/>
<mkdir dir="${src.model}"/>
<mkdir dir="${etc}"/>
<mkdir dir="${lib}"/>
<mkdir dir="${web}"/>
<mkdir dir="${classes}"/>
<mkdir dir="${tomDeployDir}"/>
<mkdir dir="${tomLibDir}"/>
<mkdir dir="${tomClassDir}"/>
<mkdir dir="${resinDeployDir}"/>
<mkdir dir="${resinLibDir}"/>
<mkdir dir="${resinClassDir}"/>
</target>
<!-- =================================================================== -->
<!-- OInformation about the file and directory structure of the web app -->
<!-- =================================================================== -->

<target name="about">
<echo> src: ${src} </echo>
<echo> srcWeb: ${src.web} </echo>
<echo> srcModel: ${src.model} </echo>
<echo> etc: ${etc} </echo>
<echo> lib: ${lib} </echo>
<echo> web: ${web} </echo>
<echo> classes: ${classes} </echo>
<echo> tomcatDeployDir: ${tomDeployDir} </echo>
<echo> tomcatLibDir: ${tomLibDir} </echo>
<echo> tomcatLibDir: ${tomClassDir} </echo>
<echo> resinDeployDir: ${resinDeployDir} </echo>
<echo> resinLibDir: ${resinLibDir} </echo>
<echo> resinClassDir: ${resinClassDir} </echo>
</target>

<!-- ================================================================ -->
<!-- Compiles the source code -->
<!-- ================================================================ -->
<target name="compileSrc" depends="init">
<javac srcdir="${src}" destdir="${classes}"
classpathref="build.classpath" debug="off">
</javac>
</target>

<!-- ================================================================ -->
<!-- Deploys the application by copying the class files to the -->
<!-- Tomcat servlet and JPD deploy directory. -->
<!-- ================================================================ -->

<target name="tomcat" description="deployement to tomcat" depends="compileSrc">
<copy todir="${tomDeployDir}">
<fileset dir="${web}">
<include name="**/*.html"/>
<include name="**/*.jsp"/>
</fileset>
</copy>
<copy todir="${tomDeployDir}/WEB-INF">
<fileset dir="${etc}">
<include name="web.xml"/>
</fileset>
</copy>
<copy todir="${tomClassDir}">
<fileset dir="${classes}">
<include name="**/*"/>
</fileset>
</copy>
<copy todir="${tomLibDir}">
<fileset dir="${lib}">
<include name="*.jar"/>
</fileset>
</copy>
</target>

<!-- ================================================================ -->
<!-- Deploys the application by copying the class files to the -->
<!-- Resin servlet and JPD deploy directory. -->
<!-- ================================================================ -->

<target name="resin" description="deployement to resin" depends="compileSrc">
<copy todir="${resinDeployDir}">
<fileset dir="${web}">
<include name="**/*.html"/>
<include name="**/*.jsp"/>
</fileset>
</copy>
<copy todir="${resinDeployDir}/WEB-INF">
<fileset dir="${etc}">
<include name="web.xml"/>
</fileset>
</copy>
<copy todir="${resinClassDir}">
<fileset dir="${classes}">
<include name="**/*"/>
</fileset>
</copy>
<copy todir="${resinLibDir}">
<fileset dir="${lib}">
<include name="*.jar"/>
</fileset>
</copy>
</target>
</project>
the structure of the application is in the file.
if you want, i can you email all the app-source.
cheers,
sergio