新手请教个问题

<s:iterator id="productList" value="#request.productList">
             <form action="putintodatabase" method="productin">
                <div class="col-md-6 services-grid" style="float:left;border:1px solid #FFF">
                    <div class="col-md-6 srvcs-img">
                      <img src="<s:property value="#productList.getAddress()"/>">
                    </div>
                    <div class="col-md-6 srvcs-text">
                        <h4 style="">
                            Name：<s:property value="#productList.getName()" />
                        </h4>
                        <p>
                            Price：<s:property value="#productList.getPrice()" /><br>
                            Quantity:<s:property value="#productList.getQuantity()" />
                            <input type="submit" value="buy it" >
                        </p>
                    </div>
                </div>
                </form>
            </s:iterator>
上面这段代码从数据库中读取6组产品数据，然后我想在通过用户点击submit按钮的方式知道用户到底想购买哪个产品，各位大神有没有什么好方法？拜谢了