Set the MYSQL_URL environment variable to the URI that contains the access information for the instance of MySQL you are using. Also explicitly add the mysql-connector-java-5.1.21.jar that maven ...

MySQL Connector/J is free for usage under the terms of the specified licensing and it runs on any Operating System that is able to run a Java Virtual Machine.

Those who want to connect databases with Eclipse IDE. This will help you to learn step by step to establish a connection of database in Eclipse IDE.

JPA 3 and Hibernate persistence.xml file As developers migrate their old Java Persistence API applications to JPA 3, their progress is often halted when an incorrectly configured JPA 3 persistence.xml ...