40c9e495a53d001d1504fdb15ccf7983

自己做的一个火车票售票网站是课程设计 用的是servlet+jsp 数据库是ms

package com.daoImpl;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

import com.dao.LiuyanDAO;
import com.jdbc.DataBaseConnection;

public class LiuyanDAOImpl implements LiuyanDAO {

	public List selectAll() {
		ArrayList al = new ArrayList();
		DataBaseConnection dbc =new DataBaseConnection();
		PreparedStatement psmt =null;
		ResultSet rs =null;
		String sql =null;
		try{
			sql="select * from liuyan";
			psmt=dbc.getConnection().prepareStatement(sql);
			rs=psmt.executeQuery();
			while (rs.next()){
				
			}
			
		}
		
		
		
		
		
		
		return null;
	}

}