简述JDBC调用数据库的基本步骤

//1.注册驱动

Class.forName("oracle.jdbc.driver.OracleDriver");

//2.获取连接

Connection conn = DriverManager.getConnection("jdcc:oracle:thin:@localhost:1506:Alfred","root","root");

//3.获取能够发送sql语句的对象

Statement st = conn.createStatement();

//4.执行sql语句

ResultSet rs = st.executeQuery(sql);

//5.有结果集处理结果集

while(rs.next){

System.out.println(rs.getInt("id")+"  "+rs.getName("name"));

}

//6.关闭资源

if(rs!=null){

rs.close();

}

if(st!=null){

st.close();

}

if(conn!=null){

conn.close();

}