DB2

依赖引入（Vert.x-3.9.1+）：

<!-- https://mvnrepository.com/artifact/io.vertx/vertx-db2-client -->
<dependency>
    <groupId>io.vertx</groupId>
    <artifactId>vertx-db2-client</artifactId>
    <version>3.9.1</version>
</dependency>

https://github.com/eclipse-vertx/vertx-sql-client/tree/master/vertx-db2-client