web前端——前端页面与后台controller实现前端后台交互

前端jsp页面：
 
     删除



后台controller:
  @RequestMapping("/del/{gid}")
    public String del(@PathVariable("gid")long gid, Model model){
        if(String.valueOf(gid)!=null &&String.valueOf(gid)!=""){
            System.out.println("gid"+gid);
            goodsService.del(gid);
        }
        else{
            System.out.print("controller del gid为空");
        }
        List goodsList=goodsService.findAll();
        model.addAttribute("goodsList",goodsList);
        return "redirect:/goods/list"; //重定向
    }