經常使用Ajax異步請求來進行數據傳輸，傳的數據是json數據，json數據又有對象，數組。所有總結下springmvc獲取前端傳來的json數據方式：
1、以RequestParam接收
前端傳來的是json數據不多時：[id:id],可以直接用@RequestParam來獲取值
@Autowired
private AccomodationService accomodationService;

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

2、以實體類方式接收
前端傳來的是一個json對象時：{[id，name]},可以用實體類直接進行自動綁定
@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
前端傳來的是一個json對象時：{[id，name]},可以用Map來獲取
@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
當前端傳來這樣一個json數組：[{id,name},{id,name},{id,name},...]時，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";
}

springmvc接收json數據的常見方式