class connection{
    public static void main(String[] args){
       try{
           Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
           Connection c = DriverManager.getConnection("jdbc:odbc:LocalServer", "sa", "");
           DatabaseMetaData dd = c.getMetaData();           System.out.println("url:" + dd.getURL());
           System.out.println("DriverName:" + dd.getDriverName());
       }catch(Exception e){
           e.printStackTrace();
       }
    }
}运行后显示错误:未发现数据源名称并且未指定默认驱动程序