删除商品的步骤

一、删除商品(数据库)
二、删除商品对应的照片(文件)
 //这里加?p=p是因为&ids 这里需要这样的格式
 String deleteUrl=basePath+"pages/back/admin/goods/GoodsBackServlet/delete?p=p";

   public String delete(HttpServletRequest request){
        //删除id(数据库)和photo(文件)
        String msg=null;
        String url=null;
        String referer=request.getHeader("referer");
        String ids = request.getParameter("ids");
        if(ValidateUtil.validateEmpty(ids)){
            Set<Integer> gids=new HashSet<>();
            Set<String> photos=new HashSet<>();
            String[] result = ids.split("\\|");
            for(int i=0;i<result.length;i++){
                String[] temp = result[i].split(":");
                gids.add(Integer.parseInt(temp[0]));
                photos.add(temp[1]);
            }
            GoodsBackService service=ServiceFactory.getInstance(GoodsBackServiceImpl.class);
            try {
                if(service.delete(gids)){
                    if(photos.size()>0){
                        Iterator<String> it = photos.iterator();
                        while(it.hasNext()){
                           String filePath=super.getServletContext().getRealPath("/upload/goods/")+it.next();
                           File file=new File(filePath);
                           if(file.exists()){
                               file.delete();
                           }
                        }
                    }
                    msg="商品删除操作成功!";
                }else{
                    msg="商品删除操作失败！";
                }
            } catch (Exception e) {        
                e.printStackTrace();
            }
        }else{
            msg="删除商品的数据有误,请重新操作!";
        }
         url="/pages/back/admin/goods/GoodsBackServlet"+referer.substring(referer.lastIndexOf("/"));
         request.setAttribute("msg", msg);
         request.setAttribute("url",url);
         return "/pages/forward.jsp";
     }

 //这是删除时传递的参数:id:photo
 <td><input type="checkbox" name="gid" id="gid" value="${goods.gid}:${goods.photo}"/></td>