Connection con =  null ;
     try  {
         Class .forName("COM.ibm.db2.jdbc.net.DB2Driver").newInstance();
         try  {
            InitialContext ctx =  new  InitialContext();
            DataSource ds = (DataSource)ctx.lookup("jdbc/OLDKKDG");
            con = ds.getConnection();
        }
         catch  (NamingException e) {
            htmlText = loaderror("Naming-Exception: " + e.getMessage());
        }
         catch  (SQLException e) { ... }
    }
     catch (Exception e) { ... }

<Server port="8005" shutdown="SHUTDOWN" debug="0">

  <!-- Uncomment these entries to enable JMX MBeans support -->
  <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
            debug="0"/>
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
            debug="0"/>

  <!-- Global JNDI resources -->
  <GlobalNamingResources>

    <!-- Test entry  for  demonstration purposes -->
    <Environment name="simpleValue" type="java.lang.Integer" value="30"/>

    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users -->
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
       description="User database that can be updated and saved">
    </Resource>
    <ResourceParams name="UserDatabase">
      <parameter>
        <name>factory</name>
        <value>org.apache.catalina.users.MemoryUserDatabaseFactory</value>
      </parameter>
      <parameter>
        <name>pathname</name>
        <value>conf/tomcat-users.xml</value>
      </parameter>
    </ResourceParams>

  </GlobalNamingResources>

  <!-- Define the Tomcat Stand-Alone Service -->
  <Service name="Tomcat-Standalone">

    <!-- Define a Coyote/JK2 AJP  1 . 3  Connector on port  8009  -->
    <Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
               port="8009" minProcessors="5" maxProcessors="75"
               enableLookups="true" redirectPort="8443"
               acceptCount="10" debug="0" connectionTimeout="20000"
               useURIValidationHack="false"
               protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/>

    <!-- Define the top level container in our container hierarchy -->
    <Engine name="Standalone" defaultHost="localhost" debug="0">

      <!-- Global logger unless overridden at lower levels -->
      <Logger className="org.apache.catalina.logger.FileLogger"
              prefix="catalina_log." suffix=".txt"
              timestamp="true"/>

      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                 debug="0" resourceName="UserDatabase"/>

      <!-- Define the  default  virtual host -->
      <Host name="localhost" debug="0" appBase="webapps" 
       unpackWARs="true" autoDeploy="true">

        <Logger className="org.apache.catalina.logger.FileLogger"
                 directory="logs"  prefix="localhost_log." suffix=".txt"
	        timestamp="true"/>

        <!-- Tomcat Examples Context -->
        <Context path="/examples" docBase="examples" debug="0"
                 reloadable="true" crossContext="true">
          <Logger className="org.apache.catalina.logger.FileLogger"
                     prefix="localhost_examples_log." suffix=".txt"
        	  timestamp="true"/>
          <Ejb   name="ejb/EmplRecord" type="Entity"
                 home="com.wombat.empl.EmployeeRecordHome"
               remote="com.wombat.empl.EmployeeRecord"/>

          <Environment name="maxExemptions" type="java.lang.Integer"
                      value="15"/>
          <Parameter name="context.param.name" value="context.param.value"
                     override="false"/>
          <Resource name="jdbc/EmployeeAppDb" auth="SERVLET"
                    type="javax.sql.DataSource"/>
          <ResourceParams name="jdbc/EmployeeAppDb">
            <parameter><name>user</name><value>sa</value></parameter>
            <parameter><name>password</name><value></value></parameter>
            <parameter><name>driverClassName</name>
              <value>org.hsql.jdbcDriver</value></parameter>
            <parameter><name>driverName</name>
              <value>jdbc:HypersonicSQL:database</value></parameter>
          </ResourceParams>
          <Resource name="mail/Session" auth="Container"
                    type="javax.mail.Session"/>
          <ResourceParams name="mail/Session">
            <parameter>
              <name>mail.smtp.host</name>
              <value>localhost</value>
            </parameter>
          </ResourceParams>
          <ResourceLink name="linkToGlobalResource" 
                    global="simpleValue"
                    type="java.lang.Integer"/>
        </Context>
      </Host>
    </Engine>
  </Service>
</Server>

    <servlet>
      <servlet-name>
          MyServlet
      </servlet-name>
      <servlet- class >
          MyServlet
      </servlet- class >
    </servlet>

      <Resource name="jdbc/OLDKKDG" auth="SERVLET"
                type="javax.sql.DataSource"/>
      <ResourceParams name="jdbc/OLDKKDG">
        <parameter><name>user</name><value>db2admin</value></parameter>
        <parameter><name>password</name><value>db2admin</value></parameter>
        <parameter><name>driverClassName</name>
          <value>COM.ibm.db2.jdbc.app.DB2Driver</value></parameter>
        <parameter><name>driverName</name>
          <value>jdbc:db2:database</value></parameter>
      </ResourceParams>