sqlserver默认端口号为：1433

URL:"jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=dbname"

DRIVERNAME:"com.microsoft.jdbc.sqlserver.SQLServerDriver";

mysql 默认端口号为：3306

URL:jdbc:mysql://localhost:3306/test?user=root&password=&useUnicode=true&characterEncoding=gbk

DRIVERNAME:"com.mysql.jdbc.Driver";

oracle 默认端口号为：1521

URL:"jdbc:oracle:thin:@localhost :1521:orcl";

DRIVERNAME:"oracle.jdbc.driver.OracleDriver";