JSP-案例-商品增删改

商品的增删改查

1显示

 

部分代码

Dao

public List<Product> findAllProduct() throws SQLException {

                  QueryRunner runner = new QueryRunner(DataSourceUtils.getDataSource());

                  String sql = "select * from product";

                  List<Product> productList = runner.query(sql, new BeanListHandler<Product>(Product.class));

                  return productList;

         }

Jsp

                                                       <c:forEach items="${productList }" var="pro" varStatus="vs">

                                                            

                                                                      <tr onmouseover="this.style.backgroundColor = 'white'"

                                                                               onmouseout="this.style.backgroundColor = '#F5FAFE';">

                                                                               <td style="CURSOR: hand; HEIGHT: 22px" align="center"

                                                                                        width="18%">${vs.count }</td>

                                                                               <td style="CURSOR: hand; HEIGHT: 22px" align="center"

                                                                                        width="17%">

                                                                                        <img width="40" height="45" src="${pageContext.request.contextPath }/${pro.pimage }">

                                                                               </td>

                                                                               <td style="CURSOR: hand; HEIGHT: 22px" align="center"

                                                                                        width="17%">${pro.pname }</td>

                                                                               <td style="CURSOR: hand; HEIGHT: 22px" align="center"

                                                                                        width="17%">${pro.shop_price }</td>

                                                                               <td style="CURSOR: hand; HEIGHT: 22px" align="center"

                                                                                        width="17%">${pro.is_hot==1?"":"" }</td>

                                                                               <td align="center" style="HEIGHT: 22px"><a

                                                                                        href="${ pageContext.request.contextPath }/adminUpdateProductUI?pid=${pro.pid}">

                                                                                                <img

                                                                                                 src="${pageContext.request.contextPath}/images/i_edit.gif"

                                                                                                border="0" style="CURSOR: hand">

                                                                               </a></td>

        

                                                                               <td align="center" style="HEIGHT: 22px">

                                                                                        <a href="javascript:void(0);" onclick="delProduct('${pro.pid}')">

                                                                                                <img src="${pageContext.request.contextPath}/images/i_del.gif"

                                                                                                width="16" height="16" border="0" style="CURSOR: hand">

                                                                                        </a>

                                                                               </td>

                                                                      </tr>

                                                            

                                                             </c:forEach>

 

 

2 增

先获得分类数据

//获得所有的商品的类别数据

                  AdminProductService service = new AdminProductService();

                  List<Category> categoryList = null;

                  try {

                          categoryList = service.findAllCategory();

                  } catch (SQLException e) {

                          e.printStackTrace();

                  }

                 

                  request.setAttribute("categoryList", categoryList);

 

在显示类别

                                                         <select name="cid">

                                                            

                                                             <c:forEach items="${categoryList }" var="category">

                                                                      <option value="${category.cid}">${category.cname }</option>

                                                             </c:forEach>

                                                            

                                                     </select>

 

 

接着做数据库添加操作

public void addProduct(Product product) throws SQLException {

                  QueryRunner runner = new QueryRunner(DataSourceUtils.getDataSource());

                  String sql = "insert into product values(?,?,?,?,?,?,?,?,?,?)";

                  runner.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());

                 

         }

3 删除

分析:你要确定你要删除的是那个,所以你要传参数,来确定你删除的是那个

Pid 来确定

Jsp

                                               <td align="center" style="HEIGHT: 22px">

                                                                                        <a href="javascript:void(0);" onclick="delProduct('${pro.pid}')">

                                                                                                <img src="${pageContext.request.contextPath}/images/i_del.gif"

                                                                                                width="16" height="16" border="0" style="CURSOR: hand">

                                                                                        </a>

                                                                               </td>

 

 

JS

  

       function delProduct(pid){

                                   var isDel = confirm("您确认要删除吗?");

                                   if(isDel){

                                            //要删除

                                            location.href = "${pageContext.request.contextPath}/adminDelProduct?pid="+pid;

                                   }

                          }

 

 

4 修改

 

比较不好处理的点:商品的分类select 里面的option

1在编辑商品时需要向数据库传递你要更改的那个

2 Select里面的option默认显示是那个;

 需要option里面的value和category里面的cid进行对比(js或者jq)

                  <script type="text/javascript">

                          $(function(){

                                   //获得当前回显的product的cid

                                   $("#cid option[value='${product.cid }']").prop("selected",true);

                                   //是否热门

                                   $("#is_hot option[value='${product.is_hot }']").prop("selected",true);

                          });

                          //页面加载完毕后 确定那个option被选中

                          /* window.onload = function(){

                                   //获得当前回显的product的cid

                                    var cid = "${product.cid }";

                                   //获得所有的<select name="cid">下的option

                                   var options = document.getElementById("cid").getElementsByTagName("option");

                                   //比较每一个option的value与cid

                                   for(var i=0;i<options.length;i++){

                                            if(cid==options[i].value){

                                                     options[i].selected = true;

                                            }

                                   }

                          } */

                  </script>

 

 

Jsp里面的编辑代码

                                              <td align="center" style="HEIGHT: 22px"><a

                                                                                        href="${ pageContext.request.contextPath }/adminUpdateProductUI?pid=${pro.pid}">

                                                                                                <img

                                                                                                 src="${pageContext.request.contextPath}/images/i_edit.gif"

                                                                                                border="0" style="CURSOR: hand">

                                                                               </a></td>

 

 5 源代码

源代码:链接:https://pan.baidu.com/s/1J5u4s3emjlluZIWw7TkZmw 密码:cl9b

 

posted @ 2018-04-02 16:22  8亩田  阅读(1206)  评论(0编辑  收藏  举报