struts2+prototype.js实现ajax

 

 

先看js

       function toCar()...{
         var goodId = $F('goodId');
         var url = '${pageContext.request.contextPath}/addToCar.html';
         var pars = 'goodId=' + goodId;
         var myAjax = new Ajax.Request(
            url,
            ...{
            method: 'get',
            parameters: pars,
            onComplete: showResponse
            });
       }

 

       function currentShopCar()...{
         var url = '${pageContext.request.contextPath}/currentShopCar.html?goodId=${singleGoods.id}';
         var myAjax = new Ajax.Request(
            url,
            ...{
            method: 'get',
            parameters: '',
            onComplete: showResponse
            });
       }

一个button调用

<td><input type="button" value="立即定购" onclick="toCar();"/></td>

一个div返回结果

<div id="result"></div>

action:

 

    public void addToCar()...{
        singleGoods = goodsManager.get(goodId);
        List shopCarsList = (List)this.getDongaoSession().get("shopCars");
        if(shopCarsList==null||shopCarsList.size()==0)...{
            shopCarsList = new ArrayList();
        }
        ShopCar sc= new ShopCar();
        sc.setName(singleGoods.getName());
        sc.setId(singleGoods.getId());
        sc.setNormalPrice(singleGoods.getPrice());
        sc.setNum(1);
        Boolean isAdd=true;
        for (int i = 0; i < shopCarsList.size(); i++) ...{
            ShopCar sctemp = (ShopCar)shopCarsList.get(i);
            if(sctemp.getId().equals(sc.getId()))...{
                sc.setNum(sctemp.getNum()+1);
                shopCarsList.remove(i);
                shopCarsList.add(sc);
                isAdd=false;
            }
        }
        if(isAdd)...{
            shopCarsList.add(sc);
        }
        this.getDongaoSession().put("shopCars", shopCarsList);
        buildXml(shopCarsList,singleGoods);
    }

 

    private void buildXml(List shopCarsList,Goods singleGoods)...{
        
        HttpServletResponse res = this.getResponse();
        /**//*
         *构建xml文件
         */
        res.setContentType("text/xml;charset=UTF-8");
        res.setHeader("Cache-Control","no-cache");
        StringBuffer xml= new StringBuffer();
        xml.append("<table border='1'>");
        xml.append("<tr>");
        xml.append("<td colspan='4'>");
        xml.append("当前购物车");
        xml.append("</td>");
        xml.append("</tr>");
        xml.append("<tr>");
        xml.append("<td>名称</td>");
        xml.append("<td>单价</td>");
        xml.append("<td>数量</td>");
        xml.append("<td>删除</td>"); 
        xml.append("</tr>");
        for (int i = 0; i < shopCarsList.size(); i++) ...{
            ShopCar shopc = (ShopCar)shopCarsList.get(i);
            xml.append("<tr>");
            xml.append("<td>"+shopc.getName()+"</td>");
            xml.append("<td>"+shopc.getNormalPrice()+"</td>");
            xml.append("<td>"+shopc.getNum()+"</td>");
            if(singleGoods!=null)...{
                xml.append("<td><a href="+"deleteOneCar.html?goodId="+shopc.getId()+">删除</a></td>"); 
            }
            xml.append("</tr>");  
        }
        xml.append("</table>");
        System.out.println("xml:" +xml.toString());
        try...{
            res.getWriter().write(xml.toString());
            res.getWriter().close();    
        } catch (IOException e)...{
            e.printStackTrace();
        }
    }