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
时间: 2024-11-05 16:12:33