点击某一个商品时，可以进行查看商品的详情：
进行写查询语句：但是里面并没有包含type，测试结果如下：
测试代码：
public Goods getById(int id) throws SQLException {//不包含type QueryRunner r = new QueryRunner(DBUtil.getDataSource()); String sql="select* from goods where id=?"; return r.query(sql, new BeanHandler<Goods>(Goods.class),id ); } public static void main(String[] args) throws SQLException { Goods g=new GoodsDao().getById(3); System.out.println(g); }
说明需要两个表进行连接，在MySQL中使用两表来连接测试其结果：
由于type中的id和name难与goods中的id和name区分，所以进行去别名：
监测typeid与typename的改变，测试代码在Goods.java中加入，最终结果：
//监测typeid与typename的改变 public void setTypeid(int typeid) { System.out.println(typeid); } public void setTypename(String typename) { System.out.println(typename); }
type的构造：
Goods.java
//监测typeid与typename的改变 public void setTypeid(int typeid) { if(type==null) { type=new Type(); } type.setId(typeid); } public void setTypename(String typename) { if(type==null) { type=new Type(); } type.setName(typename); }
结果type不为null：
GoodsDao.java写入查询语句：
public Goods getById(int id) throws SQLException {//不包含type QueryRunner r = new QueryRunner(DBUtil.getDataSource()); String sql="select g.name,g.cover,g.image1,g.image2,g.price,g.intro, g.stock,t.id typeid,t.name typename from goods g , type t where g.id=? and g.type_id=t.id"; return r.query(sql, new BeanHandler<Goods>(Goods.class),id ); }
GoodsService.java中进行异常的处理：
public Goods getById(int id) { Goods g=null; try { g = gDao.getById(id); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return g; }
GoodsDetailServlet.java中进行数据的获取：
package com.guiyan.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.guiyan.model.Goods; import com.guiyan.service.GoodsService; /** * Servlet implementation class GoodsDetailServlet */ @WebServlet("/goods_detail") public class GoodsDetailServlet extends HttpServlet { private GoodsService gService=new GoodsService(); protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int id=Integer.parseInt(request.getParameter("id")); Goods g=gService.getById(id); request.setAttribute("g", g); request.getRequestDispatcher("goods_detail.jsp").forward(request, response); } }
goods_detail.jsp进行商品详细信息的展示：
<div class="flexslider"> <ul class="slides"> <li data-thumb="${pageContext.request.contextPath }${g.cover}"> <div class="thumb-image"> <img src="${pageContext.request.contextPath }${g.cover}" data-imagezoom="true" class="img-responsive"> </div> </li> <li data-thumb="${pageContext.request.contextPath }${g.image1}"> <div class="thumb-image"> <img src="${pageContext.request.contextPath }${g.image1}" data-imagezoom="true" class="img-responsive"> </div> </li> <li data-thumb="${pageContext.request.contextPath }${g.image2}"> <div class="thumb-image"> <img src="${pageContext.request.contextPath }${g.image2}" data-imagezoom="true" class="img-responsive"> </div> </li> </ul> </div> </div> <div class="col-md-4 single-grid simpleCart_shelfItem"> <h3> ${g.name} </h3> <div class="tag"> <p>分类 : <a href="goods.action?typeid=5"> ${g.type.name} </a></p> </div> <p> ${g.intro} </p> <div class="galry"> <div class="prices"> <h5 class="item_price">¥ ${g.price} </h5> </div> <div class="clearfix"></div> </div>
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> 4 5 <!DOCTYPE html> 6 <html> 7 <head> 8 <title>商品详情</title> 9 <meta name="viewport" content="width=device-width, initial-scale=1"> 10 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 11 <link type="text/css" rel="stylesheet" href="css/bootstrap.css"> 12 <link type="text/css" rel="stylesheet" href="css/style.css"> 13 <link type="text/css" rel="stylesheet" href="css/flexslider.css"> 14 <script type="text/javascript" src="js/jquery.min.js"></script> 15 <script type="text/javascript" src="js/jquery.flexslider.js"></script> 16 <script type="text/javascript" src="js/bootstrap.min.js"></script> 17 <script type="text/javascript" src="layer/layer.js"></script> 18 <script type="text/javascript" src="js/cart.js"></script> 19 <script> 20 $(function() { 21 $('.flexslider').flexslider({ 22 animation: "slide", 23 controlNav: "thumbnails" 24 }); 25 }); 26 </script> 27 </head> 28 <body> 29 30 31 32 33 34 35 36 <jsp:include page="/header.jsp"></jsp:include> 37 38 39 <!--//single-page--> 40 <div class="single"> 41 <div class="container"> 42 <div class="single-grids"> 43 <div class="col-md-4 single-grid"> 44 <div class="flexslider"> 45 46 <ul class="slides"> 47 <li data-thumb="${pageContext.request.contextPath }${g.cover}"> 48 <div class="thumb-image"> <img src="${pageContext.request.contextPath }${g.cover}" data-imagezoom="true" class="img-responsive"> </div> 49 </li> 50 <li data-thumb="${pageContext.request.contextPath }${g.image1}"> 51 <div class="thumb-image"> <img src="${pageContext.request.contextPath }${g.image1}" data-imagezoom="true" class="img-responsive"> </div> 52 </li> 53 <li data-thumb="${pageContext.request.contextPath }${g.image2}"> 54 <div class="thumb-image"> <img src="${pageContext.request.contextPath }${g.image2}" data-imagezoom="true" class="img-responsive"> </div> 55 </li> 56 </ul> 57 </div> 58 </div> 59 <div class="col-md-4 single-grid simpleCart_shelfItem"> 60 <h3> ${g.name} </h3> 61 <div class="tag"> 62 <p>分类 : <a href="goods.action?typeid=5"> ${g.type.name} </a></p> 63 </div> 64 <p> ${g.intro} </p> 65 <div class="galry"> 66 <div class="prices"> 67 <h5 class="item_price">¥ ${g.price} </h5> 68 </div> 69 <div class="clearfix"></div> 70 </div> 71 <div class="btn_form"> 72 <a href="javascript:;" class="add-cart item_add" onclick="buy(6)">加入购物车</a> 73 </div> 74 </div> 75 <div class="col-md-4 single-grid1"> 76 <!-- <h2>商品分类</h2> --> 77 <ul> 78 79 <li><a href="goods.action?typeid=5">经典系列</a></li> 80 81 <li><a href="goods.action?typeid=4">法式系列</a></li> 82 83 <li><a href="goods.action?typeid=3">儿童系列</a></li> 84 85 <li><a href="goods.action?typeid=2">零食系列</a></li> 86 87 <li><a href="goods.action?typeid=1">冰淇淋系列</a></li> 88 89 </ul> 90 </div> 91 <div class="clearfix"> </div> 92 </div> 93 </div> 94 </div> 95 96 <!--related-products--><!-- 97 <div class="related-products"> 98 <div class="container"> 99 <h3>猜你喜欢</h3> 100 <div class="product-model-sec single-product-grids"> 101 <div class="product-grid single-product"> 102 <a href="single.html"> 103 <div class="more-product"><span> </span></div> 104 <div class="product-img b-link-stripe b-animate-go thickbox"> 105 <img src="images/m1.png" class="img-responsive" alt=""> 106 <div class="b-wrapper"> 107 <h4 class="b-animate b-from-left b-delay03"> 108 <button>View</button> 109 </h4> 110 </div> 111 </div> 112 </a> 113 <div class="product-info simpleCart_shelfItem"> 114 <div class="product-info-cust prt_name"> 115 <h4>Product #1</h4> 116 <span class="item_price">$2000</span> 117 <div class="ofr"> 118 <p class="pric1"><del>$2300</del></p> 119 <p class="disc">[15% Off]</p> 120 </div> 121 <div class="clearfix"> </div> 122 </div> 123 </div> 124 </div> 125 <div class="clearfix"> </div> 126 </div> 127 </div> 128 </div> 129 --> <!--related-products--> 130 131 132 133 134 135 136 <!-- footer --> 137 <jsp:include page="/footer.jsp"></jsp:include> 138 139 140 141 </body> 142 </html>
最终首页商品详细信息的效果：
