1、Mysql

<dependency>
	<groupId>mysql</groupId>
	<artifactId>mysql-connector-java</artifactId>
	<scope>runtime</scope>
</dependency>

2、SQLServer

<dependency>
	<groupId>com.microsoft.sqlserver</groupId>
	<artifactId>mssql-jdbc</artifactId>
	<version>6.4.0.jre8</version>
	<scope>runtime</scope>
</dependency>

3、Oracle

<dependency>
	<groupId>com.oracle</groupId>
	<artifactId>ojdbc6</artifactId>
	<version>11.2.0.1.0</version>
</dependency>