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Jsp端：
//2.请求地址为:bookServlet;
//3.请求参数为:
var idVal = $.trim(this.name);
var args = {"method":"updateItemQuantity", "id":idVal, "quantity":quantityVal, "time":new Date()};
//更新当前页面的 bookNumber 和 TotalMoney
$.post(url, args, function(date){
var bookNumber = date.bookNumber;
var totalMoney = date.totalMoney;
alert(bookNumber);
$("#bookNumber").text("您的购物车中有"+bookNumber+"本书.");
$("#totalMoney").text("总金额 ￥ "+totalMoney);
},"JSON");
});
服务器端：
Map<String, Object> result = new HashMap<String, Object>();
result.put("bookNumber", sc.getBookNumber());
result.put("totalMoney", sc.getTotalMoney());
Gson gson = new Gson();
String json = gson.toJson(result);
response.setContentType("text/javascript");
response.getWriter().print(json);
改变单品数量时若为0，触发删除操作的方法：
为<a>，标签添加onclick属性，直接调onclick方法即可
$("a").each(function(){
this.onclick = function(){
var serializeVal = $(":hidden").serialize();
var href = this.href + "&" + serializeVal;
alert(href);
window.location.href = href;
return false;
};
});
if(flag2){
$a = $tr.find("td:last").find("a");
$a[0].onclick();
return;
}