Re: Right version of jdbc

Hi,
I copied the postgres driver to Tomcat/lib.
PS C:\Program Files\Apache Software Foundation\Tomcat 9.0\lib> dir post*
Directory: C:\Program Files\Apache Software Foundation\Tomcat 9.0\lib
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a---- 28.09.2023 14:40 1081604 postgresql-42.6.0.jar
but Tomcat remains to give error -
java.sql.SQLException: No suitable driver found for
jdbc:postgresql://localhost:5432/mushroom_database
I am using Postgres 15. May be I have to use more older one ?

Raivo

On Sat, Sep 30, 2023 at 6:32 AM Craig McIlwee <craigm(at)vt(dot)edu> wrote:

> > for some reason the postgresql jar is not in the classpath.
>
> This is due to the way that Tomcat loads drivers, which is documented at
> [1]. In short, the JDBC driver should be placed in the tomcat/lib
> directory and removed from the application's WEB-INF/lib directory. After
> doing that, I was able to get past the "No suitable driver" exception.
>
> OP, you should read that entire page, and in particular the portion at
> [2]. By registering a "Resource" with Tomcat, you can let it manage a
> connection pool for you (if you aren't already using something like
> PgBouncer or pgpool) and, if registered at the container level, in the
> future you can share that pool across all of your web applications in the
> container.
>
> [1]
> https://tomcat.apache.org/tomcat-9.0-doc/jndi-datasource-examples-howto.html#DriverManager,_the_service_provider_mechanism_and_memory_leaks
> [2]
> https://tomcat.apache.org/tomcat-9.0-doc/jndi-datasource-examples-howto.html#PostgreSQL
>
> Craig
>
>>