Fixed#163 do not require driver class name when JDBC URL is specified, newer drivers following the service registration model will be automatically located by the DriverManager.

hikaricp-java6/src/main/java/com/zaxxer/hikari/HikariConfig.java

@@ -664,10 +664,6 @@ public class HikariConfig implements HikariConfigMBean
          logger.error("when specifying driverClassName, jdbcUrl must also be specified");
          throw new IllegalStateException("when specifying driverClassName, jdbcUrl must also be specified");
       }
-      else if (jdbcUrl != null && driverClassName == null) {
-         logger.error("when specifying jdbcUrl, driverClassName must also be specified");
-         throw new IllegalStateException("when specifying jdbcUrl, driverClassName must also be specified");
-      }
       else if (driverClassName != null && dataSourceClassName != null) {
          logger.error("both driverClassName and dataSourceClassName are specified, one or the other should be used");
          throw new IllegalStateException("both driverClassName and dataSourceClassName are specified, one or the other should be used");

hikaricp/src/main/java/com/zaxxer/hikari/HikariConfig.java

@@ -664,10 +664,6 @@ public class HikariConfig implements HikariConfigMBean
          logger.error("when specifying driverClassName, jdbcUrl must also be specified");
          throw new IllegalStateException("when specifying driverClassName, jdbcUrl must also be specified");
       }
-      else if (jdbcUrl != null && driverClassName == null) {
-         logger.error("when specifying jdbcUrl, driverClassName must also be specified");
-         throw new IllegalStateException("when specifying jdbcUrl, driverClassName must also be specified");
-      }
       else if (driverClassName != null && dataSourceClassName != null) {
          logger.error("both driverClassName and dataSourceClassName are specified, one or the other should be used");
          throw new IllegalStateException("both driverClassName and dataSourceClassName are specified, one or the other should be used");