我是菜鸟，想要个ｏｒａｃｌｅ数据库操作　的例子，各位帮帮忙了

import java.sql.*;

public class db_test
{
public static void main(String args[])
{
try
{
String s_server_ip="192.168.1.243";
String s_service_name="mydb";

DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
String s_url = "jdbc:oracle:thin:@"+s_server_ip+":1521:"+s_service_name;

String s_userName="myuserName";
String s_passWord="passwd";
Connection conn = DriverManager.getConnection(s_url,s_userName,s_passWord);
Statement  stmt=conn.createStatement();
String s_sql="SELECT * FROM ontimeday";
ResultSet rs=stmt.executeQuery(s_sql);

while (rs.next())
{
System.out.println("ONTIMEID:"+rs.getInt(1)+"  USER_ID:"+rs.getInt(2)+"  URLNAME:"+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
}
catch(Exception e)
{
System.out.println(e.getMessage());
e.printStackTrace();
}
} //end main
}