商城后台管理系统（一）

后台商品列表展示

1.功能截图

2.代码实现

web层

package com.itheima.web;

import java.io.IOException;
import java.sql.SQLException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.itheima.domain.Product;
import com.itheima.service.AdminProductListService;

public class AdminProductListServlet extends HttpServlet {

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html; charset=UTF-8");
		AdminProductListService service = new AdminProductListService();
		List<Product> productList = null;
		try {
			productList = service.findAllProduct();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		request.setAttribute("productList", productList);
		request.getRequestDispatcher("/admin/product/list.jsp").forward(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

　service层　

package com.itheima.service;

import java.sql.SQLException;
import java.util.List;

import com.itheima.dao.AdminProductDao;
import com.itheima.domain.Category;
import com.itheima.domain.Product;

public class AdminProductListService {
	//商品列表
	public List<Product> findAllProduct() throws SQLException {
		AdminProductDao dao = new AdminProductDao();
		List<Product> productList = dao.findAllProduct();
		return productList;
	}
	//增加商品
	public void addProduct(Product product) throws SQLException {
		AdminProductDao dao = new AdminProductDao();
		dao.addProduct(product);
		
	}
	//删除商品
	public void delProduct(String pid) throws SQLException {
		AdminProductDao dao = new AdminProductDao();
		dao.delProduct(pid);
		
	}
	//商品种类
	public List<Category> findAllCategory() throws SQLException {
		AdminProductDao dao = new AdminProductDao();
		List<Category> categoryList = dao.findAllCategory();
		return categoryList;
	}
	
	public Product findProductById(String pid) throws SQLException {
		AdminProductDao dao = new AdminProductDao();
		Product product = dao.findProductById(pid);
		return product;
	}

}

　dao层

package com.itheima.dao;

import java.sql.SQLException;
import java.util.List;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import com.itheima.domain.Category;
import com.itheima.domain.Product;
import com.itheima.utils.DataSourceUtils;

public class AdminProductDao {
	//商品列表
	public List<Product> findAllProduct() throws SQLException {
		QueryRunner qr = new QueryRunner(DataSourceUtils.getDataSource());
		String sql = "select * from product";
		return qr.query(sql, new BeanListHandler<Product>(Product.class));
	}
	//增加商品
	public void addProduct(Product product) throws SQLException {
		QueryRunner qr = new QueryRunner(DataSourceUtils.getDataSource());
		String sql = "insert into product values(?,?,?,?,?,?,?,?,?,?)";
		qr.update(sql, product.getPid(),product.getPname(),product.getMarket_price(),product.getShop_price(),
				product.getPimage(),product.getPdate(),product.getIs_hot(),product.getPdesc(),product.getPflag(),
				product.getCid());
		
	}
	//删除商品
	public void delProduct(String pid) throws SQLException {
		QueryRunner qr = new QueryRunner(DataSourceUtils.getDataSource());
		String sql = "delete from product where pid = ?";
		qr.update(sql, pid);
		
	}
	//查询商品种类
	public List<Category> findAllCategory() throws SQLException {
		QueryRunner qr = new QueryRunner(DataSourceUtils.getDataSource());
		String sql = "select * from category";
		List<Category> categoryList = qr.query(sql, new BeanListHandler<Category>(Category.class));
		return categoryList;
	}
	public Product findProductById(String pid) throws SQLException {
		QueryRunner qr = new QueryRunner(DataSourceUtils.getDataSource());
		String sql="select * from product where pid = ?";
		Product product = qr.query(sql, new BeanHandler<Product>(Product.class),pid);		
		return product;
	}

}

　　

　这里将后续几种功能的service层和dao层的代码实现都存放在一起