First JSP/Tomcat 5.5 test

Hi,
I'm new in Java and i'm trying to create a web application in JSP.
Basically, it should connect to a MS access database for the first steps, after it should use a MySQL DB.
In this purpose i would like to build this web application as flexible as it is, because i don't want to recompile or rebuild code from migration Access to MySQL.
1. where can i find a good tutorial about tomcat 5.5 setup ? I have a book for now, but it's very long way to first test...i just cover 10 % in 2 days. :(
2. where can i find a very good tutorial about connect MS access DB from JSP ?
3. how to it as flexible as i want ?
thx,
Maileen

1. where can i find a good tutorial about tomcat 5.5
setup ? I have a book for now, but it's very long way
to first test...i just cover 10 % in 2 days. :(http://www.coreservlets.com/Apache-Tomcat-Tutorial/
http://jakarta.apache.org/tomcat/tomcat-5.5-doc/index.html
2. where can i find a very good tutorial about
connect MS access DB from JSP ?you mean JDBC http://java.sun.com/j2se/1.5.0/docs/guide/jdbc/index.html
3. how to it as flexible as i want ?you can save the connection string and the jdbc driver class name and the username and password to a file and then you application should read this data from that file. when you need to move form access to mysql just change the data in the file

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Isnt it very evident from the stack trace ?
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How to combinate JSP+Tomcat+mysql??

Hi,guys. My question is as the above subject.
I have installed JDK, Tomcat, mysql, and my OS is WinXP, I am trying to develop a JSP site in my computer.
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Thanks,duffymo!
As you said, I am learning more about those things.
Actually I am trying to open a JSP webpage to show the connection JSP+Tomcat+mysql works OK.
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<%@ page contentType="text/html; charset=gb2312" %>
<%@ page language="java" %>
<%@ page import="com.mysql.jdbc.Driver" %>
<%@ page import="java.sql.*" %>
<%
//driver
String driverName="com.mysql.jdbc.Driver";
//username
String userName="test";
//code
String userPasswd="123";
//database
String dbName="test";
//table name
String tableName="mytab";
//connection string
String url="jdbc:mysql://localhost/"+dbName+"?user="+userName+"&password="+userPasswd;
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection=DriverManager.getConnection(url);
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String sql="SELECT * FROM "+tableName;
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ResultSetMetaData rmeta = rs.getMetaData();
int numColumns=rmeta.getColumnCount();
// output
out.print("id");
out.print("|");
out.print("num");
out.print(" ");
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Catching jsp/tomcat/java SQL error

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<%@ page import="java.sql.*" %>
<jsp:include page="adminHeader.html" flush="true" />
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<%
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%>
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package fruit1;
import java.sql.*;
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finally
try{
catch (Exception exception)
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 int ret = stmt.executeUpdate(query);
 return(ret);
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finally
try{
catch (Exception exception)
 boolean ret = false;
 if (rs != null)
 ret = true;
 return(ret);
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First thing to check would be the Tomcat log file. Most likely there is an error message printed there:
Look in [TOMCAT]/logs for any files modified recently. Open it, and you should find some hints as to your error.
It would be great if I could just see what is happening when
FruitConnect is processing code.For that sort of thing, you want to use a logger. Either Log4J or the standard Java1.4 logger would help. Basically configure it to log statements to file as your program runs.
I get no errors, just a blank screenThat could indicate that the page ran enough to fill up the page buffer, and then failed. When you view source, do you see anything on the page at all?

Head first jsp

hello
i need this book as a soft copy :
head first jsp & servlet.
thanx

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Upon refreshing the page, why always first.jsp is displayed ?

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Best regards,
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Hi everyone,
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<%@ page import="java.awt.*, java.awt.event.*, java.sql.* , java.text.*, java.io.*" %>
<!------------------------------------------------------------------
* This is a test page to Oracle9i database.
--------------------------------------------------------------------!>
<HTML>
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 </head>
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 I'm using connection and querying EMP names and
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 <%
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 </body>
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I got the error below:
I'm using connection and querying EMP names and salaries from the EMP table in the schema SCOTT.
There was an error doing the query:
java.sql.SQLException: No suitable driver
What is the driver? Where can I go to get it? How can I install it?
Please help. Thank you.

Hi
First of all classess12.jar or ojdbc.jar must be in classpath of your web app (WEB-INF/lib) or server's extensions dir (usually SERVER_INST/lib/ext).
MOST IMPORTANT:
To use driver you must register it within DriverManager. Specification requires drievers to register within static initializer so to register driver you need to do:
Class.forName("oracle.jdbc.driver.OracleDriver");
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should help
cheers
Kula

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I am currently reading Head First Servlets & JSP. In
the first chapter it gives you a sample servlet to
run(Ch1Servlet.java). It tells you to setup a
directory OUTSIDE of /tomcat.
/Project1
/Project1/src
/Project1/classes
/Project1/etc
On my computer it is setup as C:/Java/Project1
Then it tells you to compile it from the command line
like this:
javac -classpath /your
path/tomcat/common/lib/servlet-api.jar -d classes
src/Ch1Servlet.java
Here is what I used
javac -classpath /Program Files/Apache Software
Foundation/Tomcat 5.5/common/lib/servlet-api.jar -d
classes src/Ch1Servlet.java
This causes an error
javac usage invalid: Files/Apache
I am guessing this is because there are spaces in the
classpath name. I copied the servlet-api.jar to the
C:/Java folder and it compiled successfully. Without
having to copy files to other folders how can I get
around this error?
Add double quotes around your class path (e.g. javac -classpath "c: /Program Files/Apache Software Foundation/Tomcat 5.5/common/lib/servlet-api.jar ")
Foundation/Tomcat 5.5/common/lib/servlet-api.jar -d
classes src/Ch1Servlet.java
Once you get it compiled it tells you to add the
class files to the WEB-INF/classes directory and add
the web.xml to the WEB-INF/etc directory. The book
didn't explain where this directory is. I only
imagined it being on its own in the Tomcat5.5
directory but it wasn't there. I looked under webapps
and there is not a WEB-INF directory. What is the
book trying to tell me?
You want to create a directory called ch1 under tomcat's webapps directory.
Under the ch1 directory create a WEB-INF directory. And under WEB-INF create a
classes directory.
It also tells me once Tomcat is started to type in
http://localhost:8080/ch1/Serv1. Under the web.xml
file the mapping url is set to /Serv1 but the other
description in servlet mapping is Chapter 1 Servlet.
I don't see where the ch1 directory is. Can anyone
help me with this?
The url-pattern in the web.xml is what is used to access your servlet.
Chapter1 Servlet is just a way to map from the servlet-class to the url-pattern.
If you read further in the book all this will be explained.
My system OS: Windows XP
It also didn't explain why you would setup a
directory outside of tomcat and then have to deploy
your compiled classes back into tomcat. I am fairly
new to Java and brand new to JSP. This part of the
book seems to assume I know all this. Can anyone put
me in the right direction?You want your source to be outside of tomcat. Once you have compiled everything,
you then deploy to your container. Hope this helps

Is it possible for jsp(tomcat container) access ejb deployed in sun app se

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Hi,
Yes it is possible for a JSP in tomcat container to lookup EJB in sun app server.
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http://www.onjava.com/pub/a/onjava/2003/02/12/ejb_tomcat.html?page=2
HTH
VJ

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I used the request.getparameter() ,but when I print the value , null value is getting .

request parameters only last for one request.
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1 - store them to session
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JSP/Tomcat/MySQL

Hello JSP developers!
I have a problem trying to connect to MySQL database when I am doing a JSP or a servlet. I think the problem has to be with Tomcat, because when I do a java application with a database connection works perfectly, so there must be Tomcat.
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Generated servlet error:
D:\Apache Tomcat 4.0\work\localhost\_\JspMySQL$jsp.java:76: Class org.apache.jsp.ResultSet not found.
ResultSet results;
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I would really appreciate if you help me about this issue, because I am beginnig to get frustated.
Thanks!!!!

It appears that your JspMySQL.jsp does not import the java.sql package. Try adding the following line at the top of the JSP:
<%@ page import="java.sql.*" %>

BEAN ITERATION IS THIS A BUG in JSP /TOMCAT?

Hi,
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Help would be welcomed!
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Hi,
Thankyou for trying to help. Unfortuanately you solution does not work as
you are assiging an object (EventBean) to an array of objects (EventBean).
I can help thinking problem I am getting is because somehow when you do a
<jsp:useBean> to instantiate a bean you can reassign it later on in a scriplet, which is what I am doing. Why you cant is not something I understand.
Maybe it would help if I explained what I want to do. I am trying to get an array of beans from one jsp page and print them out in another.
so my thoughts were (and ironically the text book I am using does exactly this)
//instantiate an EventBean using
<jsp:useBean id="event" class="subscription.EventBean"/>
//get the attributes (they are attributs cos I am dispatching servlet to //jsp page)
<% EventBean[] events = (EventBean[]) request.getAttribute("events"); %>
//This now gives me the array of eventbeans I want to pring out and //rather than do it all in a scriplet try to use jsp tags which is what //all the bks say you should do.
//so I iterate thro' array and assign my EventBean object that I //instantiated using the jsp:useBean
<%
for (int i=0;i< events.length;i++) {
event= events;
%>
//now I try to print out a property (id in this instance)...
<jsp:getProperty name="event" property="id" />
<% } %>
but IT DOES NOT WORK!! I have to go <%=event.getId() %>
my bean is dead simple and works if I am doing simple stuff like setting and getting attributes on a single bean.
Maybe I a not getting scoping in JSP , it is not that clear,like normal
java code and any docs to look at would be welcomed.
Emmma.

First JSP/Tomcat 5.5 test

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