package com.tyj.dao.mysql;

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

import com.tyj.dao.ProductDao;
import com.tyj.domain.Product;

public class productDaolmptyj implements ProductDao {

	@Override
	public List<Product> findAll() {
		String  sql= "select productid,category,cname,ename,images,listprice,unitcost,descn from product";
		
		List<Product> list =  new ArrayList<Product>();
		
		try (Connection  conn =  DBHelper.getConnection();
				//创建语句对象
				PreparedStatement pstmt = conn.prepareStatement(sql);
				//绑定参数
				//执行查询
				ResultSet rs  = pstmt.executeQuery()){
			
			//遍历结果集
			while (rs.next()) {
				
				Product P = new Product();
				
				P.setProductid(rs.getString("productid"));
				P.setCategory(rs.getString("category"));
				P.setCname(rs.getString("cname"));
				P.setEname(rs.getString("ename"));
				P.setImage(rs.getString("images"));
				P.setListprice(rs.getString("listprice"));
				P.setUnitcost(rs.getString("unitcost"));
				P.setDescn(rs.getString("descn"));
				
				list.add(P);
			}
		}catch (SQLException e) {
			e.printStackTrace();
		}
				
		
		// TODO Auto-generated method stub
		return list;
	}

	@Override
	public Product findById(String id) {
		
		Connection conn = null;
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		
		
		String  sql= "select productid,category,cname,ename,images,listprice,unitcost,descn from product where productid = ?";
		try {
			// 2.创建数据库链接
			 conn = DBHelper.getConnection();//加载驱动程序
			
			// 创建语句对象
			pstmt = conn.prepareStatement(sql);
			// 绑定参数
			pstmt.setString(1, id);
			// 执行查询
			rs = pstmt.executeQuery();
			// 遍历结果
			while (rs.next()) {

Product p = new Product();
				
				p.setProductid(rs.getString("productid"));
				p.setCategory(rs.getString("category"));
				p.setCname(rs.getString("cname"));
				p.setEname(rs.getString("ename"));
				p.setImage(rs.getString("images"));
				p.setListprice(rs.getString("listprice"));
				p.setUnitcost(rs.getString("unitcost"));
				p.setDescn(rs.getString("descn"));
				
				return p;
			}

		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			if (rs != null) {
				try {
					rs.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
			if (pstmt != null) {
				try {
					pstmt.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
			if (conn != null) {
				try {
					conn.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		}
		return null;
		
	}
	public List<Product> findByCategory(String category) {
		
		Connection conn = null;
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		
		List<Product> list =  new ArrayList<Product>();
		String  sql= "select productid,category,cname,ename,images,listprice,unitcost,descn from product where category = ?";
		try {
			// 2.创建数据库链接
			 conn = DBHelper.getConnection();//加载驱动程序
			
			// 创建语句对象
			pstmt = conn.prepareStatement(sql);
			// 绑定参数
			pstmt.setString(1, category);
			// 执行查询
			rs = pstmt.executeQuery();
			// 遍历结果
			while (rs.next()) {

Product P = new Product();
				
				P.setProductid(rs.getString("productid"));
				P.setCategory(rs.getString("category"));
				P.setCname(rs.getString("cname"));
				P.setEname(rs.getString("ename"));
				P.setImage(rs.getString("images"));
				P.setListprice(rs.getString("listprice"));
				P.setUnitcost(rs.getString("unitcost"));
				P.setDescn(rs.getString("descn"));
			}

		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			if (rs != null) {
				try {
					rs.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
			if (pstmt != null) {
				try {
					pstmt.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
			if (conn != null) {
				try {
					conn.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		}
		return list;
		
	}
	@Override
	public int create(Product product) {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public int modify(Product product) {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public int remove(Product product) {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public List<Product> findCategory(String category) {
		// TODO 自动生成的方法存根
		return null;
	}



}