Tomcat und MySql

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Tomcat und MySql

Postby Mainzer84 » 22. January 2007 12:49

Hi ihr,

ich verzweifele gerade.

Ich versuche momentan ein JSP zu schreiben und daten aus eine Datenbank zu lesen, da habe ich schon ein prob bekomme die Fehlermeldung:

javax.servlet.ServletException: Unable to get connection, DataSource invalid: "org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'

das sieht für mich so aus als würde er in der server.xml die url nicht finden wo is mein denkfehler??

Code: Select all
<Context path="/Obsy" docBase="Obsy"
        debug="5" reloadable="true" crossContext="true">

    <!-- maxActive: Maximum number of dB connections in pool. Make sure you
         configure your mysqld max_connections large enough to handle
         all of your db connections. Set to 0 for no limit.
         -->

    <!-- maxIdle: Maximum number of idle dB connections to retain in pool.
         Set to -1 for no limit.  See also the DBCP documentation on this
         and the minEvictableIdleTimeMillis configuration parameter.
         -->

    <!-- maxWait: Maximum time to wait for a dB connection to become available
         in ms, in this example 10 seconds. An Exception is thrown if
         this timeout is exceeded.  Set to -1 to wait indefinitely.
         -->

    <!-- username and password: MySQL dB username and password for dB connections  -->

    <!-- driverClassName: Class name for the old mm.mysql JDBC driver is
         org.gjt.mm.mysql.Driver - we recommend using Connector/J though.
         Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver.
         -->
   
    <!-- url: The JDBC connection url for connecting to your MySQL dB.
         The autoReconnect=true argument to the url makes sure that the
         mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
         connection.  mysqld by default closes idle connections after 8 hours.
         -->

  <Resource name="jdbc/Obsy" auth="Container" type="javax.sql.DataSource"
               maxActive="100" maxIdle="30" maxWait="10000"
               username="root" password="xxx" driverClassName="com.mysql.jdbc.Driver"
               url="jdbc:mysql://localhost:3306/studisuche?autoReconnect=true"/>

</Context>


das ganze liegt im webaps verzeichnis Obsy und nennt sich test.jsp

Code: Select all
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<sql:query var="rs" dataSource="jdbc/studisuche">
select vorname from daten
</sql:query>

<html>
  <head>
    <title>DB Test</title>
  </head>
  <body>

  <h2>Results</h2>

<c:forEach var="row" items="${rs.rows}">
    Foo ${row.foo}<br/>
    Bar ${row.bar}<br/>
</c:forEach>

  </body>
</html>


achso un in der web.xml im Obsy verzeichnis steht das drin...

Code: Select all
<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">
  <description>MySQL Test App</description>
  <resource-ref>
      <description>DB Connection</description>
      <res-ref-name>jdbc/Obsy</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
  </resource-ref>
</web-app>


so den connector habe ich in das common/lib verzeichnis gesetzt!

hmm noch infos achso ja lassen tomcat 5.5 laufen
Mainzer84
 
Posts: 1
Joined: 22. January 2007 12:40

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