CShop Project 10: 开发热销和新品商品列表展示

1.　　GoodsRecommendListServlet

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

        int type = Integer.parseInt(request.getParameter("type"));
            
        int pageNo = 1;
        if(request.getParameter("pageNo") != null) {
            pageNo = Integer.parseInt(request.getParameter("pageNo"));
        }
    }

2.　　GoodsDao

public List<Goods> selectGoodsRecommend(int type,int pageNo, int pageSize) throws SQLException {
        QueryRunner r = new QueryRunner(DBUtil.getDataSource());
        String sql = "select g.id,g.name,g.cover,g.image1,g,image2,g.intro,g.price,g.stock from goods g, type t where g.id=t.goods_id and t.type=? limit ?,?";
        return r.query(sql, new BeanListHandler<Goods>(Goods.class),type,(pageNo-1)*pageSize,pageSize);
    }

　　public int selectGoodsRecommendCount(int type) throws SQLException {
　　　　　　QueryRunner r = new QueryRunner(DBUtil.getDataSource());
　　　　　　String sql = "select count(*) from recommend type=? ";
　　　　　　return r.query(sql, new ScalarHandler<Long>(),type).intValue();
　　　　}

3.　　GoodsService

public Page getGoodsRecommendPage(int type, int pageNo) {
        
        // 获得pageNo
        Page p = new Page();
        p.setPageNo(pageNo);
        
        // 获得总页数
        int totalCount = 0;
        try {
            totalCount = gDao.selectGoodsRecommendCount(type);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        p.setPageSizeAndTotalCount(8, totalCount);
        
        // 获得对应页的商品数据
        List list = null;
        try {
            list = gDao.selectGoodsRecommend(type,pageNo,8); // 每1页显示8条数据
        } catch (SQLException e) {
            e.printStackTrace();
        }
        p.setList(list);
            
        return p;        
    }

4.　　GoodsRecommendServlet

@WebServlet("/goodsrecommend_list")
public class GoodsRecommendListServlet extends HttpServlet {
    private GoodsService gService = new GoodsService();
    
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        int type = Integer.parseInt(request.getParameter("type"));
            
        int pageNo = 1;
        if(request.getParameter("pageNo") != null) {
            pageNo = Integer.parseInt(request.getParameter("pageNo"));
        }
        
        Page p = gService.getGoodsRecommendPage(type, pageNo);
        request.setAttribute("p", p);
        request.getRequestDispatcher("goodsrecommend_list.jsp").forward(request, response);        
        
    }
}

5.　　编写 goodsrecommend_list.jsp

效果: