Hi there, i'm trying to get a tomcat server running with mysql connectivity. Tomcat is
running ok, and i've downloaded the new Connector/J, and copied the .jar file to
$CATALINA_HOME/common/lib. I'm running Tomcat 5.0.16. The other JSPs work ok, but the
ones that contain a connection to mysql, fail with this message:
<snip>
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from
fulfilling this request.
exception
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
root cause
java.lang.NullPointerException
org.apache.jsp.jspCounter_jsp._jspService(jspCounter_jsp.java:83)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
Apache Tomcat/5.0.16
</snip>
I don't know anything about Java, but i think that the 'NullPointerException' is
because it can't get a handler to communicate with MySQL.
The JSP file connects to MySQL like this:
<snip>
String host = "localhost";
String dbName = "MYDBNAME";
String driver = "org.gjt.mm.mysql.Driver";
String username = "MYUSERNAME";
String password = "MYPASSWORD";
String url = "jdbc:mysql://" + host + ":3306/" + dbName;
String table = "counter";
Connection connection = null;
Statement statement = null;
Statement statement2 = null;
ResultSet resultSet = null;
ResultSetMetaData resultsMetaData = null;
String query = "";
try{
Class.forName(driver) ;
connection = DriverManager.getConnection(url, username, password);
statement = connection.createStatement();
</snip>
I've seen in some example configuration files that you can specify a DB, username,
password, etc. But i don't know if i have to do it, because this JSP specifies all
that..
If someone could give me a helping hand, I would be more than grateful.
Regards,
Leandro Costa
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