Servlet 前端后台交互

一. URL地址传值

  1.1、 地址传值　　

　　http://localhost:8080/xj/123/name.json 

　　servlet 对应接受方法　　

     @RequestMapping(value="/{name}/list.json",method = RequestMethod.GET)
     public @ResponseBody Object list(HttpServletRequest request, @PathVariable("name") String name) {

         List<School> schools = schoolService.findByNameLike(name);
         return schools;
     }

1.2、 地址参数传值

　　http://localhost:8080/xj/sch/name.json?name=123

　　servlet 对应接受方法

     @RequestMapping(value="/name/list.json",method = RequestMethod.GET)
     public @ResponseBody Object list1(HttpServletRequest request,
             @RequestParam(name="name", required=true) String name) {

         List<School> schools = schoolService.findByNameLike(name);
         return schools;
     }

二. servlet 返回类型

  2.1、 Servlet 返回界面　　

     @RequestMapping(value="/check",method = RequestMethod.GET)
     public String check(HttpServletRequest request, Model model) {
         model.addAttribute("name", "张三");
         return "credit/check";
     }

　　返回类型为：String 
　　返回界面需要的值放在 model 中

  　　@RequestMapping(value="/v/a",method = RequestMethod.POST)
     public String checkAll(HttpServletRequest request, RedirectAttributes attr,
                @Valid @ModelAttribute("ei") EducationInfo educationInfo,
                @Valid @ModelAttribute("di") DriverInfo driverInfo, BindingResult result,
                @AuthenticationPrincipal User user) {

         if(educationInfo != null && educationInfo.getPersonInfo() != null){
             try {
                 Map<String, Object> map = checkService.checkAll(user, educationInfo, driverInfo);
                 initData(attr, map);
             } catch (CreditException e) {
                 logger.info("远程服务请求失败:"+e.getMessage());
                 attr.addFlashAttribute("msg", e.getMessage());
             }
         }
         return "redirect:/check";
     }

　　通过地址重定向进行绑定，保证了返回的界面地址栏上没有多余的参数；

  2.2. servlet 返回对象

　　返回类型：@ResponseBody Object
　　同例1.1或1.2代码