jdbc简单源码

代码说明：

//登记JDBC驱动程序     Class.forName ( "org.gjt.mm.mysql.Driver" ).newInstance ( );     //连接参数与Access不同     String url = "jdbc:mysql://localhost/LearnJSP";     //建立连接     Connection connection = DriverManager.getConnection ( url, "root",       "011124" );     //SQL语句     String sql = "select * from userinfo where username="" + sUserName       + "" and userpwd = "" + sPasswd + """;     Statement stmt = connection.createStatement ( );     ResultSet rs = stmt.executeQuery ( sql ); //返回查询结果