java 访问数据库

Class.forName(“com.microsoft.sqlserver.jdbc.SQLServerDriver”);//依据不同数据库，加载不同驱动
String url = “jdbc:sqlserver://127.0.0.1:1433;databaseName=dbname” ; //数据库的连接地址（dbname为库名）
String username = “sa”; //用户名
String password = "123456"; //密码
try{ 
    //连接数据库
    Connection con = DriverManager.getConnection(url , username , password ) ; 
    Statement stmt =         con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
    ResultSet rs = stmt.executeQuery(sql);

} catch (ClassNotFoundException e) {
    e.printStackTrace();
}