Postgresql driver not found for maven dependency

问题

I am running a spring project with maven and I am trying to use postgresql. I've added the dependency to pom.xml, but at tomcat startup, I get the following error:

java.lang.ClassNotFoundException: org.postgresql.Driver

pom.xml dependency:

<dependency>
  <groupId>org.postgresql</groupId>
  <artifactId>postgresql</artifactId>
  <version>9.3-1101-jdbc41</version>
</dependency>

It appears that Maven isn't downloading the jar so the Driver class is not found. Any ideas?

回答1:

When I put this in my pom, the artifact gets downloaded. Maybe you should clean your maven repository cache or delete the folders manually and retry.

回答2:

If you came here for "missing artifact" error, This worked for me:

    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>9.4.1212</version>
    </dependency>

For PostgreSQL 10 I use this:

       <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>42.1.4</version>
        </dependency>

回答3:

Maven wasn't recognizing the new dependency I have added to pom.xml, so I added it through 'Dependency view' from the xml and that did the trick. Thank you for your answers.

回答4:

You need to place a copy of the jar in the tomcat/lib folder.

来源：https://stackoverflow.com/questions/22325713/postgresql-driver-not-found-for-maven-dependency