JDBC/MySQL Problem

Hello, I'm getting this error when trying to make a connection with MySQL:
Internal Servlet Error:
org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated.
C:\tomcat\work\localhost_8080\_0002fdb_0002ejspdb_jsp_10.java:62: Undefined variable or class name: DriverManager
     conn = DriverManager.getConnection("jdbc:mysql:numbers", "username", "password");
     ^
1 error, 1 warning
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
     at org.apache.jasper.servlet.JspServlet.doLoadJSP(JspServlet.java:612)
     at org.apache.jasper.servlet.JasperLoader12.loadJSP(JasperLoader12.java:146)
     at org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:542)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspServlet.java:258)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:268)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
     at org.apache.tomcat.core.Handler.service(Handler.java:287)
     at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
     at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
     at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
     at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
     at java.lang.Thread.run(Thread.java:536)
Here's the code I'm using:
<%
     Class.forName("org.gjt.mm.mysql.Driver").newInstance();
     java.sql.Connection conn;
     conn = DriverManager.getConnection("jdbc:mysql:numbers", "username", "password");
%>
If anyone knows how to fix this, I'd appreciate any help!

Hi,
Three things:
1. I presume numbers refers to the prot you are accesaing mysql - i tend to use default 3306.
2. If there are problems recognising DriverManagaer are you importing java.sql.*; I'm sure you are.
3. I think the sun.tools.javac.Main error relates to the tools version that you are using, although I would not guarantee this. The tools.jar in later versions of tomcat is twice the size of earlier versions and you have to ensure this is the version that your application is checking for. A quick test for this is to put the newer version(size 74k) into WEB-INF \lib directory where an application looks first for complied java files.
best,
kev
ps If I'm wrong completely, let me know as I am watching this topic

Similar Messages

JSP + JDBC + MySql Problem (Tomcat 4.1)

I'm completely helpless... whenever I try to retrieve stuff from the db (using a jsp page), I get errors that don't even make sense.
out.println(stmt.executeQuery("SELECT * FROM newsTbl WHERE articleID = 1").getString("articleTitle"));if I try doing the above, I get a "ServletException : Before start of result set" error that supposedly occurred at this line of the generated servlet:
if (pageContext != null) pageContext.handlePageException(t);---------------
If i try this:
ResultSet rsSec = stmt.executeQuery("SELECT * FROM newsSecTbl");
rsSec.beforeFirst(); //<-- Even if I don't have this line the result does not change
out.println(rsSec.next());
while (rsSec.next()) { ... }I the while loop is never initiated, because rsSec.next() is false... kind of weird if you ask me, I even put two entries into the table to make sure the cursor wasnt at the first record and saying there was no second one (which would have been right if there were only one record).
I would be very grateful if someone could help me out with this. I've never done any db programming with Java yet, so I dont have a clue what Im doing. By the way, I'm using MySql (indicated in the title) and the server was running and available when I ran the above code.
Cheers,
Tom

You can't do this:
out.println(stmt.executeQuery("SELECT * FROM newsTbl WHERE articleID = 1").getString("articleTitle"));The ResultSet you get back is a database cursor that doesn't point to the first row yet. The correct idiom is:
String sql = "SELECT * FROM newsTbl WHERE articleID = 1";
ResultSet result = stmt.executeQuery(sql);
String articleTitle = "";
while (result.next())
title = result.getString("articleTitle");
result.close();
stmt.close();If you've never done DB programming before, I'd recommend that you click on the Tutorials link to the left and go through the JDBC tutorial carefully. You'll save yourself a lot of grief.
Another good idea would be to separate out all your database code into at least one separate object, independent of the servlet. That way you can test and develop it off to the side until it's 100% solid. Then your servlet can simply instantiate one and use it. All your problems from that point forward will be servlet issues, because you'll know that your database code is working. - MOD
See if that works better. - MOD

Serious problem of jdbc-mysql connectivity using tomcat

hi everybody
i m in serious problem since last 15-20 days. i m trying hard to make the connection jdbc-mysql using tomcat with the help of a jsp test page but every time i am facing almost the similar probems listed below in detail:
to make sure that the jdrivers's .jar (mysql-connector-java-3.1.7-bin.jar) available for such connections working fine i have tried the above said connection without using tomcat....which is working fine...for this i have created a dummy database with a dummy table ..and written some queries in the .java file of my code which upon running inserts the specified values in the defined(dummy) database.
this is the confirmation that the classpath etc..are ok in regard to the mysql-connector-java-3.1.7-bin.jar
now i have placed a copy of this .jar file in to the commons/lib directory of the tomcat web server(which is suppossed to be the place for such external jars)
after doing so i have followed 2 methods :
method 1st:........
i have made aone more jar file from the following .java file....
import javax.naming.*;
import javax.sql.*;
import java.sql.*;
public class TestSQLLoad
String user = "Not Connected";
String pwd = "no pwd";
int id = -1;
public void init() {
try{
Context ctx = new InitialContext();
if(ctx == null ) {
throw new Exception("Boom - No Context");
DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/TestDB");
if (ds != null) {
Connection conn = ds.getConnection();
if(conn != null) {
user = "Got Connection "+conn.toString();
Statement stmt = conn.createStatement();
String q = "select name, password, id from user";
ResultSet rst = stmt.executeQuery(q);
if(rst.next()) {
user=rst.getString(1);
pwd=rst.getString(2);
id = rst.getInt(3);
conn.close();
}catch(Exception e) {
e.printStackTrace();
public String getUser() {
return user;
public String getPassword() {
return pwd;
public int getID()
return id;
after compiling it at the cmd prompt i made a .jar file from the .class of it and named it MySQLLoad.jar...then i placed it also in to the commons/lib directory where the mysql-connector-java-3.1.7-bin.jar was already placed.
then i have changed the server.xml and web.xml files from the conf directory of the tomcat as given here:
server.xml



<Server port="8005" shutdown="SHUTDOWN">

<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" />
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />

<GlobalNamingResources>

<Environment name="simpleValue" type="java.lang.Integer" value="30"/>

<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>


<Service name="Catalina">

<Connector
port="80" maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
connectionTimeout="20000" disableUploadTimeout="true" />


<Connector port="8009"
enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />

<Engine name="Catalina" defaultHost="localhost">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Context path="/testdb" docBase="TOMCAT_HOME/webapps/tomcat-docs/testdb"
debug="5" reloadable="true" crossContext="true" >
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_DBTest_log." suffix=".txt"
timestamp="true"/>
<Resource name="jdbc/TestDB"
auth="Container"
type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/TestDB">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>10</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>5</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter>

<parameter>
<name>username</name>
<value>root</value>
</parameter>
<parameter>
<name>password</name>
<value>mysql</value>
</parameter>

<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost/testdb?autoReconnect=true</value>
</parameter>
</ResourceParams>
</Context>
</Host>
</Engine>
</Service>
</Server>
and the other xml file i.e
web.xml is here:
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<servlet>
<servlet-name>default</servlet-name>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/TestDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
<servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-cl ***>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<init-param>
<param-name>listings</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>invoker</servlet-name>
<servlet-class>
org.apache.catalina.servlets.InvokerServlet
</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet>
<servlet-name>jsp</servlet-name>
<servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
<init-param>
<param-name>fork</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>xpoweredBy</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>3</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>invoker</servlet-name>
<url-pattern>/servlet/*</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>jsp</servlet-name>
<url-pattern>*.jsp</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>jsp</servlet-name>
<url-pattern>*.jspx</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<mime-mapping>
<extension>abs</extension>
<mime-type>audio/x-mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ai</extension>
<mime-type>application/postscript</mime-type>
</mime-mapping>
<mime-mapping>
<extension>aif</extension>
<mime-type>audio/x-aiff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>aifc</extension>
<mime-type>audio/x-aiff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>aiff</extension>
<mime-type>audio/x-aiff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>aim</extension>
<mime-type>application/x-aim</mime-type>
</mime-mapping>
<mime-mapping>
<extension>art</extension>
<mime-type>image/x-jg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>asf</extension>
<mime-type>video/x-ms-asf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>asx</extension>
<mime-type>video/x-ms-asf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>au</extension>
<mime-type>audio/basic</mime-type>
</mime-mapping>
<mime-mapping>
<extension>avi</extension>
<mime-type>video/x-msvideo</mime-type>
</mime-mapping>
<mime-mapping>
<extension>avx</extension>
<mime-type>video/x-rad-screenplay</mime-type>
</mime-mapping>
<mime-mapping>
<extension>bcpio</extension>
<mime-type>application/x-bcpio</mime-type>
</mime-mapping>
<mime-mapping>
<extension>bin</extension>
<mime-type>application/octet-stream</mime-type>
</mime-mapping>
<mime-mapping>
<extension>bmp</extension>
<mime-type>image/bmp</mime-type>
</mime-mapping>
<mime-mapping>
<extension>body</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>cdf</extension>
<mime-type>application/x-cdf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>cer</extension>
<mime-type>application/x-x509-ca-cert</mime-type>
</mime-mapping>
<mime-mapping>
<extension>class</extension>
<mime-type>application/java</mime-type>
</mime-mapping>
<mime-mapping>
<extension>cpio</extension>
<mime-type>application/x-cpio</mime-type>
</mime-mapping>
<mime-mapping>
<extension>csh</extension>
<mime-type>application/x-csh</mime-type>
</mime-mapping>
<mime-mapping>
<extension>css</extension>
<mime-type>text/css</mime-type>
</mime-mapping>
<mime-mapping>
<extension>dib</extension>
<mime-type>image/bmp</mime-type>
</mime-mapping>
<mime-mapping>
<extension>doc</extension>
<mime-type>application/msword</mime-type>
</mime-mapping>
<mime-mapping>
<extension>dtd</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>dv</extension>
<mime-type>video/x-dv</mime-type>
</mime-mapping>
<mime-mapping>
<extension>dvi</extension>
<mime-type>application/x-dvi</mime-type>
</mime-mapping>
<mime-mapping>
<extension>eps</extension>
<mime-type>application/postscript</mime-type>
</mime-mapping>
<mime-mapping>
<extension>etx</extension>
<mime-type>text/x-setext</mime-type>
</mime-mapping>
<mime-mapping>
<extension>exe</extension>
<mime-type>application/octet-stream</mime-type>
</mime-mapping>
<mime-mapping>
<extension>gif</extension>
<mime-type>image/gif</mime-type>
</mime-mapping>
<mime-mapping>
<extension>gtar</extension>
<mime-type>application/x-gtar</mime-type>
</mime-mapping>
<mime-mapping>
<extension>gz</extension>
<mime-type>application/x-gzip</mime-type>
</mime-mapping>
<mime-mapping>
<extension>hdf</extension>
<mime-type>application/x-hdf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>hqx</extension>
<mime-type>application/mac-binhex40</mime-type>
</mime-mapping>
<mime-mapping>
<extension>htc</extension>
<mime-type>text/x-component</mime-type>
</mime-mapping>
<mime-mapping>
<extension>htm</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>html</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>hqx</extension>
<mime-type>application/mac-binhex40</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ief</extension>
<mime-type>image/ief</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jad</extension>
<mime-type>text/vnd.sun.j2me.app-descriptor</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jar</extension>
<mime-type>application/java-archive</mime-type>
</mime-mapping>
<mime-mapping>
<extension>java</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jnlp</extension>
<mime-type>application/x-java-jnlp-file</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jpe</extension>
<mime-type>image/jpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jpeg</extension>
<mime-type>image/jpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jpg</extension>
<mime-type>image/jpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>js</extension>
<mime-type>text/javascript</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jsf</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jspf</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>kar</extension>
<mime-type>audio/x-midi</mime-type>
</mime-mapping>
<mime-mapping>
<extension>latex</extension>
<mime-type>application/x-latex</mime-type>
</mime-mapping>
<mime-mapping>
<extension>m3u</extension>
<mime-type>audio/x-mpegurl</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mac</extension>
<mime-type>image/x-macpaint</mime-type>
</mime-mapping>
<mime-mapping>
<extension>man</extension>
<mime-type>application/x-troff-man</mime-type>
</mime-mapping>
<mime-mapping>
<extension>me</extension>
<mime-type>application/x-troff-me</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mid</extension>
<mime-type>audio/x-midi</mime-type>
</mime-mapping>
<mime-mapping>
<extension>midi</extension>
<mime-type>audio/x-midi</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mif</extension>
<mime-type>application/x-mif</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mov</extension>
<mime-type>video/quicktime</mime-type>
</mime-mapping>
<mime-mapping>
<extension>movie</extension>
<mime-type>video/x-sgi-movie</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mp1</extension>
<mime-type>audio/x-mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mp2</extension>
<mime-type>audio/x-mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mp3</extension>
<mime-type>audio/x-mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mpa</extension>
<mime-type>audio/x-mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mpe</extension>
<mime-type>video/mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mpeg</extension>
<mime-type>video/mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mpega</extension>
<mime-type>audio/x-mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mpg</extension>
<mime-type>video/mpeg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>mpv2</extension>
<mime-type>video/mpeg2</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ms</extension>
<mime-type>application/x-wais-source</mime-type>
</mime-mapping>
<mime-mapping>
<extension>nc</extension>
<mime-type>application/x-netcdf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>oda</extension>
<mime-type>application/oda</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pbm</extension>
<mime-type>image/x-portable-bitmap</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pct</extension>
<mime-type>image/pict</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pdf</extension>
<mime-type>application/pdf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pgm</extension>
<mime-type>image/x-portable-graymap</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pic</extension>
<mime-type>image/pict</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pict</extension>
<mime-type>image/pict</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pls</extension>
<mime-type>audio/x-scpls</mime-type>
</mime-mapping>
<mime-mapping>
<extension>png</extension>
<mime-type>image/png</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pnm</extension>
<mime-type>image/x-portable-anymap</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pnt</extension>
<mime-type>image/x-macpaint</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ppm</extension>
<mime-type>image/x-portable-pixmap</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ppt</extension>
<mime-type>application/powerpoint</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ps</extension>
<mime-type>application/postscript</mime-type>
</mime-mapping>
<mime-mapping>
<extension>psd</extension>
<mime-type>image/x-photoshop</mime-type>
</mime-mapping>
<mime-mapping>
<extension>qt</extension>
<mime-type>video/quicktime</mime-type>
</mime-mapping>
<mime-mapping>
<extension>qti</extension>
<mime-type>image/x-quicktime</mime-type>
</mime-mapping>
<mime-mapping>
<extension>qtif</extension>
<mime-type>image/x-quicktime</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ras</extension>
<mime-type>image/x-cmu-raster</mime-type>
</mime-mapping>
<mime-mapping>
<extension>rgb</extension>
<mime-type>image/x-rgb</mime-type>
</mime-mapping>
<mime-mapping>
<extension>rm</extension>
<mime-type>application/vnd.rn-realmedia</mime-type>
</mime-mapping>
<mime-mapping>
<extension>roff</extension>
<mime-type>application/x-troff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>rtf</extension>
<mime-type>application/rtf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>rtx</extension>
<mime-type>text/richtext</mime-type>
</mime-mapping>
<mime-mapping>
<extension>sh</extension>
<mime-type>application/x-sh</mime-type>
</mime-mapping>
<mime-mapping>
<extension>shar</extension>
<mime-type>application/x-shar</mime-type>
</mime-mapping>
<mime-mapping>
<extension>smf</extension>
<mime-type>audio/x-midi</mime-type>
</mime-mapping>
<mime-mapping>
<extension>sit</extension>
<mime-type>application/x-stuffit</mime-type>
</mime-mapping>
<mime-mapping>
<extension>snd</extension>
<mime-type>audio/basic</mime-type>
</mime-mapping>
<mime-mapping>
<extension>src</extension>
<mime-type>application/x-wais-source</mime-type>
</mime-mapping>
<mime-mapping>
<extension>sv4cpio</extension>
<mime-type>application/x-sv4cpio</mime-type>
</mime-mapping>
<mime-mapping>
<extension>sv4crc</extension>
<mime-type>application/x-sv4crc</mime-type>
</mime-mapping>
<mime-mapping>
<extension>swf</extension>
<mime-type>application/x-shockwave-flash</mime-type>
</mime-mapping>
<mime-mapping>
<extension>t</extension>
<mime-type>application/x-troff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>tar</extension>
<mime-type>application/x-tar</mime-type>
</mime-mapping>
<mime-mapping>
<extension>tcl</extension>
<mime-type>application/x-tcl</mime-type>
</mime-mapping>
<mime-mapping>
<extension>tex</extension>
<mime-type>application/x-tex</mime-type>
</mime-mapping>
<mime-mapping>
<extension>texi</extension>
<mime-type>application/x-texinfo</mime-type>
</mime-mapping>
<mime-mapping>
<extension>texinfo</extension>
<mime-type>application/x-texinfo</mime-type>
</mime-mapping>
<mime-mapping>
<extension>tif</extension>
<mime-type>image/tiff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>tiff</extension>
<mime-type>image/tiff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>tr</extension>
<mime-type>application/x-troff</mime-type>
</mime-mapping>
<mime-mapping>
<extension>tsv</extension>
<mime-type>text/tab-separated-values</mime-type>
</mime-mapping>
<mime-mapping>
<extension>txt</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ulw</extension>
<mime-type>audio/basic</mime-type>
</mime-mapping>
<mime-mapping>
<extension>ustar</extension>
<mime-type>application/x-ustar</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xbm</extension>
<mime-type>image/x-xbitmap</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xht</extension>
<mime-type>application/xhtml</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xhtml</extension>
<mime-type>application/xhtml</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xml</extension>
<mime-type>text/xml</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xpm</extension>
<mime-type>image/x-xpixmap</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xsl</extension>
<mime-type>text/xml</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xwd</extension>
<mime-type>image/x-xwindowdump</mime-type>
</mime-mapping>
<mime-mapping>
<extension>wav</extension>
<mime-type>audio/x-wav</mime-type>
</mime-mapping>
<mime-mapping>
<extension>svg</extension>
<mime-type>image/svg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>svgz</extension>
<mime-type>image/svg</mime-type>
</mime-mapping>
<mime-mapping>
<extension>vsd</extension>
<mime-type>application/x-visio</mime-type>
</mime-mapping>
<mime-mapping>

<extension>wbmp</extension>
<mime-type>image/vnd.wap.wbmp</mime-type>
</mime-mapping>
<mime-mapping>

<extension>wml</extension>
<mime-type>text/vnd.wap.wml</mime-type>
</mime-mapping>
<mime-mapping>

<extension>wmlc</extension>
<mime-type>application/vnd.wap.wmlc</mime-type>
</mime-mapping>
<mime-mapping>

<extension>wmls</extension>
<mime-type>text/vnd.wap.wmlscript</mime-type>
</mime-mapping>
<mime-mapping>

<extension>wmlscriptc</extension>
<mime-type>application/vnd.wap.wmlscriptc</mime-type>
</mime-mapping>
<mime-mapping>
<extension>wrl</extension>
<mime-type>x-world/x-vrml</mime-type>
</mime-mapping>
<mime-mapping>
<extension>Z</extension>
<mime-type>application/x-compress</mime-type>
</mime-mapping>
<mime-mapping>
<extension>z</extension>
<mime-type>application/x-compress</mime-type>
</mime-mapping>
<mime-mapping>
<extension>zip</extension>
<mime-type>application/zip</mime-type>
</mime-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
after all this i have taken a jsp page whose code is here:
(the mysql database used is named as "testdb" and the table name is "user" which is having fields name,password and id)
<html>
<head>
<title>DB Test</title>
</head>
<body>
<%
TestSQLLoad tst = new TestSQLLoad ( );
tst.init();
%>
<h2>Results</h2>
User <%= tst.getUser() %>
Pwd <%= tst.getPassword() %>
Id <%= tst.getID() %>
</body>
</html>
and placed it in to the Tomcat 5.5\webapps\tomcat-docs\testdb directory and saved as test-db.jsp
when i run this page on the browser i get a lot may errors stating
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 12 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
An error occurred at line: 12 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.j ava:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:389)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.4 logs.
AND NOW WHEN just to get rid of such errords i try to include a statement
<%@ page import="pkg.TestSQLLoad" %> in the jsp page code (and also place the MySQLLoad.class file in a folder called pkg and place it in the same directory where the jsp page is )and make it look like
<html>
<head>
<%@ page import="pkg.TestSQLLoad" %>
<title>DB Test</title>
</head>
<body>
<%
TestSQLLoad tst = new TestSQLLoad ( );
tst.init();
%>
<h2>Results</h2>
User <%= tst.getUser() %>
Pwd <%= tst.getPassword() %>
Id <%= tst.getID() %>
</body>
</html>
now when i run it i get the following errors:
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
Only a type can be imported. pkg.TestSQLLoad resolves to a package
An error occurred at line: 12 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
An error occurred at line: 12 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.j ava:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:389)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
in response to the above error i have even tried placing the MySQLLoad.class directly in the testdb folder along with the jsp page without keeping it in a package named pkg and then importing directly as <@page import="MySQLLoad" %>
that too gave me the following errors
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
The import TestSQLLoad cannot be resolved
An error occurred at line: 12 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
An error occurred at line: 12 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.j ava:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:389)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
and if i do not use the statement <%@ page import="MySQLLoad"%> then also i get the errors like
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 11 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
An error occurred at line: 11 in the jsp file: /testdb/test-db.jsp
Generated servlet error:
TestSQLLoad cannot be resolved or is not a type
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.j ava:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:389)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
THE 2nd Method:
in my second method i did the same changes in the web.xml and server.xml
then i took a jsp page with the following code:
<%@ page import="javax.sql.*,java.sql.*,javax.naming.*,com.mysql.jdbc.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> trial doc </TITLE>
</HEAD>
<BODY>
<h1>Trial Document</h1>
<% InitialContext context=new InitialContext( );
DataSource dataSource=(DataSource) context.lookup("java:comp/env/jdbc/testdb");
Connection conn=dataSource.getConnection();
Statement stmt=conn.createStatement();
ResultSet rset=stmt.executeQuery("select * from user");
if (rset.next()){
%>
<table width="100%" border="1">
<tr align="left">
<th>name</th> <th>password</th><th>id</th>
</tr>
<%
do {
%>
<tr><td> <%=rset.getString(1)%> </td>
<td><%=rset.getString(2) %></td>
<td><%=rset.getString(3) %></td></tr>
<%
} while (rset.next());
%>
</table>
<%
} else{
%>
No results from query
<%
rset.close();
stmt.close();
conn.close();
context.close();
%>
</BODY>
</HTML>
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 15 in the jsp file: /testdb/Big1.jsp
Generated servlet error:
The type Connection is ambiguous
An error occurred at line: 15 in the jsp file: /testdb/Big1.jsp
Generated servlet error:
The type Statement is ambiguous
An error occurred at line: 15 in the jsp file: /testdb/Big1.jsp
Generated servlet error:
The type ResultSet is ambiguous
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.j ava:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:389)
org.apache.jasper.compiler.Compiler.compile(C

thanx for ur response
as u said that the problem is more of a jsp page not getting compiled....
me also pointed towards the similar situation providing all the surrounding situations
which i have met and gone through
i m still thinking that problem may b in the tomcat's server.xml and web.xml as well
so better if u plz guide me in that regard
regards,
kuldeep

JDBC/MYSQL Connection problems

I'm new to using JDBC so I'm not sure if I'm simply doing something wrong in my code or if I've installed something incorrectly. I've got the JDBC connector/J installed properly as far as I can tell. At least when I run my code I'm not getting an error about the driver not being found. The problem I'm running into is that even though I've double and triple checked the authentication info I keep getting the following error:
Exception in thread "main" java.sql.SQLException: Invalid authorization specification message from server: "Access denied for user: '[email protected]' (Using password: YES)"
The actual connection commands I'm using are as follows:
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = DriverManager.getConnection("jdbc:mysql://localhost/Test", "testusr", "testpwd");
I've checked and rechecked the spelling of my mySQL user & password and as far as I can tell, they work just fine so I can't figure out why I would be getting this error. Any suggestions on things I can try or does anyone see any obvious errors in what I'm doing?

The failure is caused not by the JDBC driver but by how the MySQL was configured
when it was installed. By default, MySQL is configured to allow connections that
are created only from within the localhost.
The line
DriverManager.getConnection("jdbc:mysql://localhost:3306/Test?user=testusr& password=testpwd") translates to "create a connection to MySQL running at 'localhost' and use the
'testusr@<hostname.domain>' as user name and 'testpwd' as the password".
If you can see, the <hostname.domain> is replaced with "other value" aside from
the "localhost" which you expect, hence connection is denied.
The '<hostname.domain>' is replaced with the value of either your IP address or
hostname. Therefore, any connections created from outside the host where your
server is running will be denied. Now, making the 'host' value set from
'localhost' to '%' would tell MySQL that you are allowing connections created from
outside the MySQL host to connect to the server.
Another way to go around this is problem is to modify your
"\Windows\system32\drivers\etc\hosts" OR "/etc/hosts" file and give
your loopback address (127.0.0.1) another alias (aside from localhost), e.g.:
127.0.0.1 localhost <hostnameY.domain>
192.168.1.1 <hostnameX.domain> <hostnameY.domain>where you replace <hostnameY.domain> with the name/alias of your computer in
the network. The domain is optional and depends upon the domain name that
your network is using.

JDBC MySQL Connector/J problems when using in applets

I wrote a piece of code which uses the MySQL Connector/J which worked in a normal shell application but when used in an applet it just didnt print anything. The code is:
import java.net.*;
import java.sql.*;
class DB {
static Connection c;
static Statement stmt;
static ResultSet to;
public static String[] getUsers() {
     String str[] = new String[100];
     try {
          Class.forName("com.mysql.jdbc.Driver").newInstance();
     catch (Exception E) {}
     try {
          c = DriverManager.getConnection("jdbc:mysql://localhost/PROGRAM?user=blah&password=blah");
          stmt = c.createStatement();
          to = stmt.executeQuery("SELECT usr_user FROM usr");
          for(int i=0; to.next(); i++) str[i] = to.getString(1);
     catch (SQLException E) {}
     return str;
Is there a problem accessing a MySQL Database via an applet

Applet runs out of a sandbox, if you print the exception, you'll see that you have run into security access violation:
catch (SQLException E) {
E.printStackTrace();
}This will tell you why your applet didn't print anything. Just a firendly advice, never try to catch something and don't display what was caught.
;o)
V.V.
PS: To solve, your problem, you can either sign the applet or use a policy file to grant the applet the required access right.

JDBC MYSQL Connection Problem

Hi guys I have created a database called books in MySQL and I have the following code to test the link of connection. I am using Netbeans.
import java.sql.*;
public class jdbcexample1 {
/** Creates a new instance of jdbcexample1 */
public jdbcexample1() {
* @param args the command line arguments
public static void main(String[] args) {
// TODO code application logic here
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection("jdbc:mysql:///books", "jhtp6", "jhtp6");
if(!con.isClosed())
System.out.println("Successfully connected to MySQL server...");
} catch(Exception e) {
System.err.println("Exception: " + e.getMessage());
} finally {
try {
if(con != null)
con.close();
} catch(SQLException e) {}
However my program when run gives me the exception message which is
"Exception: com.mysql.jdbc.Driver"
Before you tell me, I have put the "mysql-connector-java-3.0.14-production-bin" in the ext folder of jre and I have also appended the CLASSPATH as follows.
".;C:\PATH\mysql-connector-java-3.0.14-production-bin.jar;" which leads to the jre ext folder.
What am I doing wrong, Have I missed something above and if not what could be wrong with my setup.
Thanks!! :)

Helo,
I have just started with java, I am also using netbeans, I used similar code to test the link, the code gives the following error when compiled:
java.lang.NoClassDefFoundError: JdbcExample1
Exception in thread "main"
Java Result: 1
The code I used is a s follows:
package com.stardeveloper.example;
import java.sql.*;
public class JdbcExample1 {
public static void main(String args[]) {
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection("jdbc:mysql:///pet", "root", "siemens");
if(!con.isClosed())
System.out.println("Successfully connected to MySQL server...");
} catch(Exception e) {
System.err.println("Exception: " + e.getMessage());
} finally {
try {
if(con != null)
con.close();
} catch(SQLException e) {}
Pls help..
Thanks..
Hi guys I have created a database called books in
MySQL and I have the following code to test the link
of connection. I am using Netbeans.
import java.sql.*;
public class jdbcexample1 {
/** Creates a new instance of jdbcexample1 */
public jdbcexample1() {
* @param args the command line arguments
public static void main(String[] args) {
// TODO code application logic here
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
con =
DriverManager.getConnection("jdbc:mysql:///books",
"jhtp6", "jhtp6");
if(!con.isClosed())
System.out.println("Successfully connected to MySQL
server...");
} catch(Exception e) {
System.err.println("Exception: " + e.getMessage());
} finally {
try {
if(con != null)
con.close();
} catch(SQLException e) {}
However my program when run gives me the exception
message which is
"Exception: com.mysql.jdbc.Driver"
Before you tell me, I have put the
"mysql-connector-java-3.0.14-production-bin" in the
ext folder of jre and I have also appended the
CLASSPATH as follows.
".;C:\PATH\mysql-connector-java-3.0.14-production-bin.
jar;" which leads to the jre ext folder.
What am I doing wrong, Have I missed something above
and if not what could be wrong with my setup.
Thanks!! :)

JAVA with MYSQL problem

i am using jdk1.6.0_02,apache tomcat 5.5.23 ,mysql integrated with redhat linux EE 4 and.mysql connector java 5.0.7.bin.jar.
look at the the following java program
import java.sql.*;
public class TestMysql
public static void main(String args[])
try
String driver = "com.mysql.jdbc.Driver";
Class.forName( driver );
String url = "jdbc:mysql://localhost/test";
DriverManager.getConnection( url, "root", "mysql" );
catch( Exception x )
{ x.printStackTrace();
i got the following exception
java.sql.SQLException: Access denied for user 'root'@'localhost.localdomain' (us *** password:
YES)
at com.mysql.jdbc.SQLError.createSQLException(java.lang.String, java.lang.Str ***, int)
(Unknown Source)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(int) (Unknown Source)
at com.mysql.jdbc.MysqlIO.checkErrorPacket() (Unknown Source)
at com.mysql.jdbc.MysqlIO.secureAuth411(com.mysql.jdbc.Buffer, int, java.lang .String,
java.lang.String, java.lang.String, boolean) (Unknown Source)
at com.mysql.jdbc.MysqlIO.doHandshake(java.lang.String, java.lang.String, jav a.lang.String)
(Unknown Source)
at com.mysql.jdbc.Connection.createNewIO(boolean) (Unknown Source)
at com.mysql.jdbc.Connection.Connection(java.lang.String, int, java.util.Prop erties,
java.lang.String, java.lang.String) (Unknown Source)
at com.mysql.jdbc.NonRegisteringDriver.connect(java.lang.String, java.util.Pr operties)
(Unknown Source)
at java.sql.DriverManager.getConnection(java.lang.String, java.util.Propertie s)
(/usr/lib/libgcj.so.5.0.0)
at java.sql.DriverManager.getConnection(java.lang.String, java.lang.String, j
ava.lang.String) (/usr/lib/libgcj.so.5.0.0)
at Connect.main(java.lang.String[]) (Unknown Source)
access denied problem. but the user name and password are correct. i can login to mysql by using
the same username and password.
but when connecting through java , i can't ? what is the problem?
can u help me.?
actually i am working in JSP. and when i got this problem, i created a small java program for testing.
here i am submitting the java program.

friend please put your code inside
// your code goes here it will more readable and other can solve it better.
==================
and your problem tells that you must set access permission inside
mySQL server.
or try with creating new User with password.
EnJOY.
Ghanshyam
Edited by: Ghanshyam on Sep 28, 2007 4:13 PM

Mysql problem with german special characters

hi,
I wrote a software and it worked quite good, but after I installed it on a new machine with j2se 1.4 I've problems with the german special characters.
this code works good on the old machine (jdk 1.3.1) and prints the wanted characters like �,�,�.
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
java.sql.Connection conn;
conn = DriverManager.getConnection("jdbc:mysql://localhost/testdb?user=testuser&password=xxxx");
Statement s = conn.createStatement();
ResultSet r = s.executeQuery("select something from testtb where id='1'");
r.first();
System.out.println( r.getString(1) );
but on the new machine (j2se 1.4) I only receive the character ?.
I updated my org.gjt.mm.mysql to the current MySQL Connector/J 3.0.9 and added
conn = DriverManager.getConnection("jdbc:mysql://localhost/testdb?user=testuser&password=xxxx&useUnicode=true&characterEncoding=ISO-8859-1");
but I've got still the same problem.
Thanks in advance
Markus

with "wanted characters like �,�,�"
I meant: like ä,ü,ö

JDBC Mysql Resultset too large!

Hello everybody,
I'm currently building a large database retrieval system(JAVA and mysql). Everything works fine, but I have a big problem. The returning resultset is way higher then it should be!!
The table has the following structure:
Probe_set_id unsigned mediumint(6)
Expressionvalue float(5,1)
Dataset unsigned tinyint(2)
I'm trying to retrieve a dataset with 6.5 million rows with the following query.
Select Probe_Set_ID, Expressionvalue from Test5 where dataset=1
This results in JAVA taking around 500 megabyte retrieving the Resultset!!! If my calculations are right it should take around the following:
Float 4 bytes * 6500000 = 26000000 bytes
unsigned mediumint = long 8 bytes * 6500000 = 52000000 bytes
That would be 78000000 bytes, which is around 75 megabyte and not 500 megabyte!!!!!
Code sample:
               String dataBaseName = "testDB";
               String dataBaseUser = "java";
               String dataBasePass = "clustering";
               String url = "jdbc:mysql://localhost/" + dataBaseName;
               Class.forName ("org.gjt.mm.mysql.Driver").newInstance ();
               Connection conn = DriverManager.getConnection (url, dataBaseUser, dataBasePass);
               conn.setReadOnly(true);
               Statement s = conn.createStatement();
               s.execute("Select Probe_Set_ID, Expressionvalue from Test5 where dataset=1");
               ResultSet rs = s.getResultSet();
This results in a giant resultset and I can't see the answer. I hope someone can help me. I'm using the newest JDBC driver of mysql!

Yes the JAVA application really takes up this amount! It is really akward. The DB doesn't take a real big amount of memory because of the buffer sizes I've set. I execute the java application as follow:
./java -server -XX:MaxHeapFreeRatio=5 -XX:MinHeapFreeRatio=20 -Xmx1512M dbTest
I'm really trying to keep the heap small because the JAVA application ( a gene expression processing application/server) takes big amounts of memmory when downloading data from the mysql database and the server is accesible by multiple users parallel. Though I'm still testing alone, so the memmory abuse is not a cause by other users.

Jdbc mysql error

Hi,
Everything is set up and running on Redhat7.1. Version 1.3.1 of jdk is
installed and tomcat version 3.2.1.
I also installed the mod_jserv module and started serving jsp pages
which worked perfectly.
I then downloaded the mysql jdbc drivers from the mysql site and
installed them and set the classpath to
correct path in /etc/profile. I get the following error when connecting
to the mysql database:
Root cause:
java.sql.SQLException: Server configuration denies access to data source
at org.gjt.mm.mysql.MysqlIO.init(MysqlIO.java:144)
at org.gjt.mm.mysql.Connection.(Connection.java:230)
at org.gjt.mm.mysql.Driver.connect(Driver.java:126)
at java.sql.DriverManager.getConnection(DriverManager.java:517)
at java.sql.DriverManager.getConnection(DriverManager.java:199)
at
jsp.num._0002fjsp_0002fnum_0002fnumguess_0002ejspnumguess_jsp_59._jspService(_0002fjsp_0002fnum_0002fnumguess_0002ejspnumguess_jsp_59.java:86)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java)
at org.apache.tomcat.core.Handler.service(Handler.java)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java)
at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java)
at
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java)
at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java)
at java.lang.Thread.run(Thread.java:484)
Heres the code that i used.
<html><body>
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<%@ page import="java.sql.*"%>
<%@ page import="javax.servlet.*"%>
<%@ page import="javax.servlet.http.*"%>
<%
//try {
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Connection Conn =
DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql?user=root&password=");
Statement Stmt = Conn.createStatement();
String SQL="SELECT * from user";
ResultSet RS = Stmt.executeQuery(SQL);
while (RS.next()) {
System.out.println(RS.getString(1));
// Clean up after ourselves
RS.close();
Stmt.close();
Conn.close();
//catch (SQLException E) {
// System.out.println("SQLException: " + E.getMessage());
// System.out.println("SQLState: " + E.getSQLState());
// System.out.println("VendorError: " + E.getErrorCode());
%></body></html>
Now if I uncomment the commented code I get no error but I also get no
results which is wrong.
I'm thinking there is a priviledge problem. The mysql database is set up
to alloow any user to connect.
Any help would be greatly appreciated.
Winston

I had this problem a few days ago myself and finally went to the developer of the mySQL driver. According to the developer, RedHat, for some unknown reason, maps
127.0.0.1 to "localhost.localdomain". To fix the problem, I had to change the host in my db table from "localhost" to "localhost.localdomain". In my URL, I still used 'localhost'. I also did this in my user table.
Example:
Update user set host = "localhost.localdomain"
where host = "localhost";
Update db set host = "localhost.localdomain"
where host = "localhost";
This works for me through JDBC on Redhat.
Maybe you can help me. Where did you put your driver class files? I tried putting them in WEB-INF/lib and that didn't seem to work. I tried putting them in WEB-INF/classes and that didn't seem to work either. I keep getting, "no suitable driver" which means it has something to do with the CLASSPATH. Unfortunately, since I am using a hosting company that is unfamiliar with servlets, I am limited on what I can get them to do.

JDBC, MySQL and the rudeness of SQLExceptions

Hi there
I'm having an annoying problem (no, really?).
I've got a MySQL database running on a nice little Red Hat Linux server. It works just fine, and I can access it remotely from my windows desktop. So I'm trying to write a little client app.
I'm using Windows XP with Java2 v1.4.01. For my JDBC drivers I'm using Connector/J (formerly mm.mysql). The connector/J jar is in jre\lib\ext. I have also unpacked it to C:\Java\Connector and linked directly to the jar in my CLASSPATH environment variable.
So everything sounds right so far, yeah?
Trouble is, every time I try to connect I get a rude "No Suitable Driver" error. I've searched extensively for material about this problem, but no solution I've tried seems to work. Any comments, suggestions etc will be appreciated.
The test code is quoted below:
import java.sql.*;
public class MySQLClient{
private boolean connected;
private Connection conn;
public MySQLClient(){
     connected = false;
public boolean Connect(String userName, String userPwd){
try {


Hmmmm code was cut off. Here it is again.
import java.sql.*;
public class MySQLClient{
private boolean connected;
private Connection conn;
public MySQLClient(){
     connected = false;
public boolean Connect(String userName, String userPwd){
try {
     Class.forName("com.mysql.jdbc.Driver").newInstance();
     conn = DriverManager.getConnection(
"jdbc:mysql:190.100.7.1:3306", userName, userPwd);
     connected = true;
     System.out.println("Connect OK!");
     } catch (java.lang.ClassNotFoundException e){
System.err.println("Can't find the freakin' driver");
     System.err.println(e.getMessage());
     } catch (java.lang.InstantiationException e){
     System.err.println("WTF???");
     System.err.println(e.getMessage());
     } catch (java.lang.IllegalAccessException e){
System.err.println("Illegal access");
     System.err.println(e.getMessage());
%

Jdbc:mysql generating exception when ip address is included as part of url

hie
I recently wrote a java application that uses jdbc:mysql connector to connect to the mysql database. The problem I'm facing is ,- when ever I include IP addresses in the url on the getConnection method I get the following exception:
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection refused: connect
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection refused: connect
The funny part is that if I use localhost on the url it works but generates the exception when I put the IP address of the local machine.
Anybody who knows where the problem is , please help
thanx in advance

localhost usually resolves to 127.0.0.1, not the routable IP address of the host.
mysql (or any TCP/IP based program) can tell which IP address you connected via.
Your mysql installation apparently isn't configured to allow external connections. The problem could be persmissions or the installation itself, or a firewall on the host.
See the fine manual:
http://dev.mysql.com/doc/refman/5.1/en/can-not-connect-to-server.html
http://dev.mysql.com/doc/refman/5.1/en/connection-access.html
http://dev.mysql.com/doc/refman/5.1/en/security-guidelines.html

Jdbc resultset problem

Hi all
i'm gtting a problem with the action listener event of my "Next" and "Previous" Jbuttons. The code that i have written makes the program search only for the next record and not further...and sameproblem for previous button.
That is: If originally i'm on the 3rd record, when i press next it goes to 4th record and when i press next again nothing happens. The same applies to my previous event.
Can anyone give me a hint on how to solve this problem?
i post my code below:
next.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent evt)
                    try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = DriverManager.getConnection("jdbc:mysql:///Super","root","");
Statement s = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
s.execute("SELECT * FROM tblcustomer");
     ResultSet rs = s.getResultSet();
     rs.next();
          cus.setText(rs.getString(1));
          fname.setText(rs.getString(2));
          lname.setText(rs.getString(3));
          txtadd.setText(rs.getString(4));
          txtcity.setText(rs.getString(5));
          txtcountry.setText(rs.getString(6));
          catch (Exception e)
          JOptionPane.showMessageDialog(null,"No further record available!");
});

thanx for your help but i still can't access the second record
here is my code below, have a look at it:
Class.forName("com.mysql.jdbc.Driver").newInstance();
final Connection conn=DriverManager.getConnection("jdbc:mysql:///Super", "root","");
previous.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent evt)
                    try
                         final Statement s= conn.createStatement();
                    s.execute("SELECT * FROM tblcustomer");
          ResultSet rs = s.getResultSet();
                    if (!rs.isFirst())
                    while ( rs.previous() ){
                    rs.relative(-1);
                    cus.setText(rs.getString("Customer_ID"));
                    fname.setText(rs.getString("First_Name"));
                    lname.setText(rs.getString("Last_Name"));
                    txtadd.setText(rs.getString("Address"));
                    txtcity.setText(rs.getString("City"));
                    txtcountry.setText(rs.getString("Country"));
                    catch (Exception e)
          JOptionPane.showMessageDialog(null,"No further record available!");
          );

JDBC MySQL connector & autoexec.bat

This what I entered into my autoexec file but when I run my java program it gives me a 'no suitable driver' error. I do not know what I should be entering for the
'CLASSPATH' in the autoexec. Below is what I entered. The file jar file is located in my C:\unzipped\mysql-connector-java-3.1.7/ folder.
C:\unzipped\mysql-connector-java-3.1.7\mysql-connector-java-3.1.7-bin.jar%CLASSPATH%
Can somebody with knowledge in installing the JDBC driver for MySQL give me some help please.

This works perfectly in the Eclipse IDE area that I have but when I run the same program on the Net Beans 3.6 IDE area it gives me a 'not suitable driver' error. To note these are both on the same computer. I would really like to get the Net Beans 3.6 IDE working because that is what I am most familiar with using. If you know of the problem why one IDE area recognizes the driver where the next does not I would sure like to know. Somebody passed the idea that when the 3.6 area is executed there are multiple instances running and it resets the ClassPath(I think they where shooting in the dark but it is a lead none the less). Anyway if anybody has had this problem please enlighten me, Thank-You.
The ClassPath is set to the following:
ClassPath = C:\Program Files\Java\jdk1.5.0_02\lib;C:\unzipped\mysql-connector- java-3.1.7\mysql-connector-java-3.1.7;C:\Program Files
\Java\jdk1.5.0_02\jre\lib\ext;
This is the code:
import java.sql.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class Connect2 {
     public static void main(String[] args) {
          try {
               // The newInstance() call is a work around for some
               // broken Java implementations
               Class.forName("com.mysql.jdbc.Driver");
          } catch (Exception ex) {
               System.out.println("HERE");
          try {
               String url = "jdbc:mysql://localhost/test";
               String username = "root";
               String password = "password";
               Connection conn = DriverManager.getConnection(
                         "jdbc:mysql://localhost/test", "root", "password");
               Statement c = conn.createStatement();
               c.execute("insert into green values('richmond')");
               c.execute("select * from green");
               ResultSet rs = c.getResultSet();
               while (rs.next()) {
                    System.out.println(rs.getString(1));
               // Do something with the Connection
          } catch (SQLException ex) {
               // handle any errors
               System.out.println("SQLException: " + ex.getMessage());
               System.out.println("SQLState: " + ex.getSQLState());
               System.out.println("VendorError: " + ex.getErrorCode());
}

WHAT'S GOING ON!!!? JDBC Statement Problems

Sorry about the 2 previous posts, I kept getting an error when I tried to submit my thread saying that it could not be posted, but obviously it could!!
Anyway can anyone help me? One of my JSP's refuses to execute properly so I presume there is something wrong with the associated methods in my connector.java file. Everytime I try and run my JSP in TomCat it produces the error message "java.sql.SQLException: java.sql.SQLException: General error, message from server: "Table 'talboothdb.roomsoccupied' doesn't exist". The MySQL statements I am using work fine when typed directly into MySQL via the Command Prompt so I know they arn't the problem. Can anyone see where I am going wrong?
The neccessary connector java and the JSP I am using are displayed below,
package javaclass;
import java.sql.*;
import java.util.*;
public class connector{
String error;
Connection con;
ResultSet rs = null;
int success;
public connector()   { }
public void connect() throws ClassNotFoundException,
                         SQLException,
                         Exception {
     try
          Class.forName("org.gjt.mm.mysql.Driver").newInstance();
          con = DriverManager.getConnection(
               "jdbc:mysql://localhost:3306/talboothdb","","");
          } catch (ClassNotFoundException cnfe) {
               error = "ClassNotFoundException: could not locate DB driver";
               throw new ClassNotFoundException(error);
          } catch (SQLException cnfe) {
               error = "SQL Exception: Could not connect to database.";
               throw new SQLException(error);
          } catch (Exception e) {
               error = "Exception: An unknown error occured while connecting to DB";
               throw new Exception(error);
     public void disconnect() throws SQLException {
          try {
               if ( con != null ) {
                    con.close();
          } catch (SQLException sqle) {
               error = ("SQLException: unable to close the DB connection");
               throw new SQLException(error);
public void roomsBooked(String arrivalDate, String departureDate)
                            throws SQLException, Exception {
          if (con != null) {
            try {
              PreparedStatement checkBookings;
              checkBookings = con.prepareStatement
                   ( "CREATE TEMPORARY TABLE roomsoccupied "
                    + "SELECT roombooked.room_id FROM roombooked, booking "
                    + "WHERE "
                    + "roombooked.booking_id = booking.booking_id "
                    + "AND "
                    + "booking.arrival_date < '?' "
                    + "AND "
                    + "booking.departure_date > '?' "
              checkBookings.setString(1, departureDate);
              checkBookings.setString(2, arrivalDate);
              checkBookings.executeUpdate();
            } catch (SQLException sqle) {
              error = ""+sqle;
              throw new SQLException(error);
          } else {
            error = "Exception: Connection to database was lost.";
            throw new Exception(error);
     public ResultSet roomsAvailable()
                            throws SQLException, Exception {
          if (con != null) {
            try {
              PreparedStatement checkAvailability;
              checkAvailability = con.prepareStatement
                   ( "SELECT rooms.room_no FROM rooms "
                    + "LEFT JOIN roomsoccupied ON rooms.room_no=roomsoccupied.room_id "
                    + "WHERE roomsoccupied.room_id IS NULL;"
              checkAvailability.executeQuery();
            } catch (SQLException sqle) {
              error = ""+sqle;
              throw new SQLException(error);
          } else {
            error = "Exception: Connection to database was lost.";
            throw new Exception(error);
       return rs;
<%@ page language="java"
    import="java.sql.*, java.io.*, java.util.*
     " errorPage="error.jsp" %>
<jsp:useBean id="javaBean" class="javaclass.connector" />
<html>
<head></head>
<body>
<%
      javaBean.connect();
      String arrivalDate = request.getParameter("ArrivalDate");
      String departureDate = request.getParameter("DepartureDate");
      ResultSet rs = javaBean.roomsAvailable();
      while(rs.next())
      { %> Room number <%= rs.getString(1) %>
       <P><% }
      javaBean.disconnect();
%>
</body>
</html>

Cross-posted every which way from Sunday:
http://forum.java.sun.com/thread.jsp?thread=498755&forum=48&message=2355311
http://forum.java.sun.com/thread.jsp?thread=498751&forum=54&message=2355294
http://forum.java.sun.com/thread.jsp?thread=498747&forum=48&message=2355272
http://forum.java.sun.com/thread.jsp?thread=498746&forum=48&message=2355270
http://forum.java.sun.com/thread.jsp?thread=497689&forum=54&message=2350463
bluey_the_punch, why are you so wedded to this CREATE TEMPORARY TABLE? In an earlier thread it was recommended that you see if this can be managed with a JOIN. Did you at least try it?
I see you added PreparedStatement, but you didn't implement it correctly. You certainly don't need to put single quotes around the question marks in the SQL. I'd also recommend that you make those columns dates in your database and use setDate() to bind the values. Strings compare much differently than dates do. If you're not getting the expected results, that might be why.
It just looks like you've blown off the advice you've gotten so far and just keep asking the same question in hope of getting the answer you want to hear. JMO - MOD

JDBC/MySQL Problem

Similar Messages

Maybe you are looking for