springmvc接收json数据的4种方式

电玩女神 2022-05-22 06:46 187阅读 0赞

## ajax我经常用到，传的数据是json数据，json数据又有对象，数组。所有总结下springmvc获取前端传来的json数据方式： ##

## 1、以RequestParam接收 ##

前端传来的是json数据不多时：\[id:id\],可以直接用@RequestParam来获取值

@Autowired
    private AccomodationService accomodationService;
    
    @RequestMapping(value = "/update")
    @ResponseBody
    public String updateAttr(@RequestParam ("id") int id) {
        int res=accomodationService.deleteData(id);
        return "success";
    }

## 2、以实体类方式接收 ##

前端传来的是一个json对象时：\{【id，name】\},可以用实体类直接进行自动绑定

@Autowired
    private AccomodationService accomodationService;
    
        @RequestMapping(value = "/add")
        @ResponseBody
        public String addObj(@RequestBody Accomodation accomodation) {
            this.accomodationService.insert(accomodation);
            return "success";
        }

## 3、以Map接收 ##

前端传来的是一个json对象时：\{【id，name】\},可以用Map来获取

@Autowired
    private AccomodationService accomodationService;
    
    @RequestMapping(value = "/update")
    @ResponseBody
    public String updateAttr(@RequestBody Map<String, String> map) {
        if(map.containsKey("id"){
            Integer id = Integer.parseInt(map.get("id"));
        }
        if(map.containsKey("name"){
            String objname = map.get("name").toString();
        }
        // 操作 ...
        return "success";
    }

## 4、以List接收 ##

当前端传来这样一个json数组：\[\{id,name\},\{id,name\},\{id,name\},...\]时，用List<E>接收

@Autowired
    private AccomodationService accomodationService;
    
    @RequestMapping(value = "/update")
    @ResponseBody
    public String updateAttr(@RequestBody List<Accomodation> list) {
        for(Accomodation accomodation:list){
            System.out.println(accomodation.toString());
        }
        return "success";
    }

我的座右铭：不会，我可以学；落后，我可以追赶；跌倒，我可以站起来；我一定行。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTIyMDQ3Mg_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTIyMDQ3Mg_size_16_color_FFFFFF_t_70]: /images/20220522/9d9e6c0b69a6412895ba74cd375e9a86.png