解決spring mvc 返回json數(shù)據(jù)到ajax報(bào)錯(cuò)parseerror問題

$.ajax({ 
 type: 'POST', 
 url: "groupFunctionEdit", 
 dataType: 'json', 
 contentType: "application/json", 
 data: JSON.stringify(functiondata), 
 success: function(data){ 
 alert('數(shù)據(jù)加載成功'+data.msg); 
 }, 
 error: function(xhr, type){ 
 alert('數(shù)據(jù)加載失敗'); 
 console.log(type); 
 } 

@RequestMapping("/groupFunctionEdit") 
 public @ResponseBody Object groupFunctionEdit(@RequestBody List<YyGroupFunction> yyGroupFunctionList) throws JsonProcessingException{ 
 
 return "success"; 
 } 

@RequestMapping("/groupFunctionEdit") 
 public @ResponseBody Object groupFunctionEdit(@RequestBody List<YyGroupFunction> yyGroupFunctionList) throws JsonProcessingException{ 
 Map<String,Object> map = new HashMap<String,Object>(); 
 map.put("msg", "success"); 
 ObjectMapper mapper = new ObjectMapper(); 
 String msg = mapper.writeValueAsString(map); 
 return msg; 
 } 

{"msg":"success"}