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importing a class

yolly dagdag
Greenhorn

Joined: Aug 27, 2001
Posts: 4
hi i want to create a utility class
for calling JDBC api and import this class
in my servlet.
i am able to successfully compile my class
but when i try to import it in my servlet
i get a "cannot resolve symbol" error.
i placed them in the same directory. pls.
webapps/testyrd/web-inf/classes/pexdb
here's my code:
//JSQL class
/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/

package org.apache.tomcat.core;
import org.apache.tomcat.core.*;
import org.apache.tomcat.util.*;
import java.io.*;
import java.net.*;
import java.util.*;
/**
*/
public class BaseInterceptor implements RequestInterceptor, ContextInterceptor {
protected ContextManager cm;
protected String methods[]=new String[0];
protected int debug=0;
protected String name=null;

public BaseInterceptor() {
}

public void setDebug( int d ) {
debug=d;
}
public void setContextManager( ContextManager cm ) {
this.cm=cm;
}
protected void log( String s ) {
if( name == null ) {
String cname=this.getClass().getName();
name=cname.substring( cname.lastIndexOf(".") +1);
name=name + ": ";
}
if( cm!= null )
cm.log( name + s );
else
System.out.println(name + s );
}

// -------------------- Request notifications --------------------
public int requestMap(Request request ) {
return 0;
}
public int contextMap( Request rrequest ) {
return 0;
}
public int authenticate(Request request, Response response) {
return 0;
}
public int authorize(Request request, Response response,
String reqRoles[]) {
return 0;
}
public int preService(Request request, Response response) {
return 0;
}
public int beforeBody( Request rrequest, Response response ) {
return 0;
}
public int newSessionRequest( Request request, Response response) {
return 0;
}

public int beforeCommit( Request request, Response response) {
return 0;
}

public int afterBody( Request request, Response response) {
return 0;
}
public int postService(Request request, Response response) {
return 0;
}
public String []getMethods() {
return methods;
}
// -------------------- Context notifications --------------------
public void contextInit(Context ctx) throws TomcatException {
}
public void contextShutdown(Context ctx) throws TomcatException {
}
public void addContainer(Container container) throws TomcatException {
}
public void removeContainer(Container container) throws TomcatException {
}
/**
*/
public void addSecurityConstraint( Context ctx, String path, Container ct )
throws TomcatException
{
}
/** Called when the ContextManger is started
*/
public void engineInit(ContextManager cm) throws TomcatException {
this.cm=cm;
}
/** Called before the ContextManager is stoped.
* You need to stop any threads and remove any resources.
*/
public void engineShutdown(ContextManager cm) throws TomcatException {
}

/** Called when a context is added to a CM
*/
public void addContext( ContextManager cm, Context ctx ) throws TomcatException {
}
/** Called when a context is removed from a CM
*/
public void removeContext( ContextManager cm, Context ctx ) throws TomcatException {
}
public void reload( Request req, Context ctx)
throws TomcatException
{
}
/** Servlet Init notification
*/
public void preServletInit( Context ctx, ServletWrapper sw ) throws TomcatException {
}

public void postServletInit( Context ctx, ServletWrapper sw ) throws TomcatException {
}
/** Servlet Destroy notification
*/
public void preServletDestroy( Context ctx, ServletWrapper sw ) throws TomcatException {
}

public void postServletDestroy( Context ctx, ServletWrapper sw ) throws TomcatException {
}
}

//MY SERVLET: CREATEDB
package pexdb;
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import pexdb.JSQL;
public class CreateDB extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
response.setContentType("text/html");
//Load MySQL Driver
JSQL pexJSQL = new JSQL();
pexJSQL.loadDriver();
pexJSQL.getConnection();
out.write("My First CLass is ok!");

}//end of doService method.

}
do i need to set the class path?

William Brogden
Author and all-around good cowpoke
Rancher

Joined: Mar 22, 2000
Posts: 12769
    
    5

You have place the class in this package:
package org.apache.tomcat.core;
Therefore the class file has to be located according to that package name.
"i placed them in the same directory. pls.
webapps/testyrd/web-inf/classes/pexdb"
That would work if your package statement was:
package pexdb ;
For a cannot resolve symbol error, there is no need to post the code, only the package and your directory setup are of interest and we certainly don't need to see the Apache license.
Bill
yolly dagdag
Greenhorn

Joined: Aug 27, 2001
Posts: 4
sorry... it was my first time to post here. i didn't knew that
was included in the code. anyway thanks. i solved the problem
anyway. the error was in compilation. i just included the class
during compilation:
javac %CLASSPATH% JSQL.java CreateDB.java
and it worked.
 
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subject: importing a class