<db.driver.groupId>com.h2database</db.driver.groupId>
    <db.driver.artifactId>h2</db.driver.artifactId>
    <db.driver.version>1.4.187</db.driver.version>
    <!--mysql driver-->
    <!--<db.driver.groupId>mysql</db.driver.groupId>
    <db.driver.artifactId>mysql-connector-java</db.driver.artifactId>
    <db.driver.version>5.1.34</db.driver.version>-->
    <!--postgresql driver-->
    <!--<db.driver.groupId>postgresql</db.driver.groupId>-->
    <!--<db.driver.artifactId>postgresql</db.driver.artifactId>-->
    <!--<db.driver.version>9.1-901-1.jdbc4</db.driver.version>-->
    <!--oracle driver-->
    <!--<db.driver.groupId>com.oracle</db.driver.groupId>
    <db.driver.artifactId>ojdbc14</db.driver.artifactId>
    <db.driver.version>10.2.0.4.0</db.driver.version>-->