Connecting to a database

In this recipe, we will connect to a MySQL or PostgreSQL database from a Spring application. To connect to another database system, go to http://www.oxygenxml.com/database_drivers.html to find the relevant dependencies, driver class, and URL type.

Getting ready

You need a MySQL or PostgreSQL database up and running.

How to do it…

Here are the steps to connect from a Spring application to an existing database:

1. Add the Maven dependency for Spring JDBC in pom.xml:

   <dependency>
     <groupId>org.springframework</groupId>
     <artifactId>spring-jdbc</artifactId>
     <version>4.1.6.RELEASE</version>
   </dependency>

2. If you're using MySQL, add its Maven dependency in pom.xml:

   <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <version>5.1.35</version>
   </dependency>

3. If you're using PostgreSQL, add its Maven dependency in pom.xml:

   <dependency>
     <groupId...