Mysql:
Class.forName("org.gjt.mm.mysql.Driver");
Connection con=DriverManager.getConnection("jdbc:mysql://localhost/dbname","root","");
MSSQL:
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
Connection con=DriverManager.getConnection("jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=dbname","username","password");