jdbc prepareStatement 작업

package com.wisely.ch5_2_2;

import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Date;

import com.mysql.jdbc.Connection;

public class Test {
	private static Connection getConn() {
	    String driver = "com.mysql.jdbc.Driver";
	    String url ="jdbc:mysql://127.0.0.1:3306/my";
	    String username = "root";
	    String password = "root";
	    Connection conn = null;
	    try {
	        Class.forName(driver); //classLoader,      
	        conn = (Connection) DriverManager.getConnection(url, username, password);
	    } catch (ClassNotFoundException e) {
	        e.printStackTrace();
	    } catch (SQLException e) {
	        e.printStackTrace();
	    }
	    return conn;
	}
	public static void main(String[]args){
		Connection con=getConn();
		String sql="insert into user (name,sex) values (?,?)";
		String sql1="select sex from user ";
		try {
			PreparedStatement ps=con.prepareStatement(sql);
			ps.setString(1, "1");
			ps.setString(2, "b");
			//     
			/*ResultSet res=ps.executeQuery();
			int col = res.getMetaData().getColumnCount();
			while(res.next())
			{
				System.out.println(res.getString(1));
			}*/
			//            
			con.setAutoCommit(false);
			long time=System.currentTimeMillis();
			for(int i=0;i<10000;i++) {
				ps.executeUpdate();
			}
			con.commit();
			long end=System.currentTimeMillis();
			System.out.println(end-time);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}