<div class="section_container">
 <!-- 購物車 -->
 <div id="shopping_cart">
  <div class="message success">我的購物車</div>
   <table class="data-table cart-table" cellpadding="0" cellspacing="0">
    <tr>
     <th class="align_center" width="10%">商品編號</th>
     <th class="align_left" width="35%" colspan="2">商品名稱</th>
     <th class="align_center" width="10%">銷售價(jià)格</th>
     <th class="align_center" width="20%">數(shù)量</th>
     <th class="align_center" width="15%">小計(jì)</th>
     <th class="align_center" width="10%">刪除</th>
    </tr>
    <c:forEach items="${sessionScope.forder.sorders }" var="sorder" varStatus="num">
    <tr lang="${sorder.product.id}">
     <td class="align_center"><a href="#" class="edit">${num.count }</a></td>
     <td width="80px"><img src="${shop}/files/${sorder.product.pic}" width="80" height="80" /></td>
     <td class="align_left"><a class="pr_name" href="#">${sorder.name }</a></td>
     <td class="align_center vline">${sorder.price }</td>
     <td class="align_center vline">
      <!-- 文本框 -->
      <input class="text" style="height: 20px;" value="${sorder.number }" lang="${sorder.number }">  
     </td>
     <td class="align_center vline">${sorder.price*sorder.number }</td>
     <td class="align_center vline"><a href="#" class="remove"></a></td>
    </tr>
    </c:forEach>

   </table>
   <!-- 結(jié)算 -->
   <div class="totals">
    <table id="totals-table">
     <tbody>
      <tr>
       <td width="60%" colspan="1" class="align_left"><strong>小計(jì)</strong></td>
       <td class="align_right" style=""><strong>￥<span
          class="price" id="total">${sessionScope.forder.total}</span>
       </strong></td>
      </tr>
      <tr>
       <td width="60%" colspan="1" class="align_left">運(yùn)費(fèi)</td>
       <td class="align_right" style="">￥<span class="price" id="yunfei">0.00</span></td>
      </tr>
      <tr>
       <td width="60%" colspan="1" class="align_left total"><strong>總計(jì)</strong></td>
       <td class="align_right" style="">￥<span class="total" id="totalAll"><strong>${sessionScope.forder.total}</strong></span>
       </td>
      </tr>
     </tbody>
    </table>
    <div class="action_buttonbar">
     <font><a href="${shop}/user/confirm.jsp">
      <button type="button" title="" class="checkout fr" style="background-color: #f38256;">訂單確認(rèn)</button></a>
     </font>
     <font><a href="#">
      <button type="button" title="" class=" fr">
       <font>清空購物車</font>
      </button>
     </font>
     <a href="${shop}/index.jsp">
      <button type="button" title="" class="continue fr">
       <font>繼續(xù)購物</font>
      </button></a>
     <div style="clear:both"></div>
    </div>
   </div>
  </div>

<script type="text/javascript">
 $(function(){
  //1. 注冊事件
  $(".text").change(function(){
  //2. 驗(yàn)證數(shù)據(jù)的有效性
   var number = this.value; //也可以使用$(this).val();
   //isNaN(number)表示若number不是數(shù)字就返回真
   if(!isNaN(number) && parseInt(number)==number && number>0){ 
    //如果合法，同步更新的數(shù)
    $(this).attr("lang", number);
    //找到當(dāng)前標(biāo)簽中第一個(gè)是tr的父節(jié)點(diǎn)，然后拿到屬性為lang的值，也就是商品的id
    var pid = $(this).parents("tr:first").attr("lang");
    //發(fā)送Ajax請求，傳輸當(dāng)前的數(shù)量與商品的id，返回修改數(shù)量后的總價(jià)格
    $.post("sorder_updateSorder.action", 
     {number:number, 'product.id':pid},
     function(total){  
      $("#total").html(total); //所有商品小計(jì)
      var yunfei = $("#yunfei").html();
      $("#totalAll").html((total*1 + yunfei*1).toFixed(2));//所有商品小計(jì)和運(yùn)費(fèi)的和
    }, "text");
    //計(jì)算單個(gè)商品的小計(jì)，保留兩位小數(shù)
    var price = ($(this).parent().prev().html()*number).toFixed(2);
    $(this).parent().next().html(price);
   } else {
    //如果非法，還原為剛剛合法的數(shù)
    this.value = $(this).attr("lang");
   }
  })
 })
</script>

@Controller
@Scope("prototype")
public class SorderAction extends BaseAction<Sorder> {
 public String addSorder() {

 //省略無關(guān)的代碼……

 //根據(jù)商品編號更新商品數(shù)量
 public String updateSorder() {
  Forder forder = (Forder) session.get("forder");
  //更新購物項(xiàng)，傳進(jìn)來的product.id被封裝到了model中
  forder = sorderService.updateSorder(model, forder);
  //計(jì)算新的總價(jià)格
  forder.setTotal(forderService.cluTotal(forder));
  session.put("forder", forder);
  //以流的形式返回新的總價(jià)格
  inputStream = new ByteArrayInputStream(forder.getTotal().toString().getBytes());
  return "stream";
 }
}

//SorderService接口
public interface SorderService extends BaseService<Sorder> {
 //省去無關(guān)的代碼……
 //根據(jù)商品id和數(shù)量更新商品數(shù)量
 public Forder updateSorder(Sorder sorder, Forder forder);
}

//SorderServiceImpl實(shí)現(xiàn)類
@Service("sorderService")
public class SorderServiceImpl extends BaseServiceImpl<Sorder> implements
  SorderService {

 //省略無關(guān)的代碼……

 @Override
 public Forder updateSorder(Sorder sorder, Forder forder) {
  for(Sorder temp : forder.getSorders()) {
   if(temp.getProduct().getId().equals(sorder.getProduct().getId())) {
    temp.setNumber(sorder.getNumber());
   }
  }
  return forder;
 }
}

<global-results>
  <!-- 省去其他公共配置 -->
  <result name="stream" type="stream">
   <param name="inputName">inputStream</param>
  </result>
</global-results>