如何从restwebservicespring返回自定义响应

我期待着结果 确切地 如下(你可以看到单引号)

{
    "success": true,
    "friends":  ['Kanchhi@example.com','modi@example.com','maya@example.com','jetli@example.com','john@example.com'] ,
    "count": 5
}

但现在我是这样的:(我们必须去掉双引号)

{
    "success": true,
    "friends": "['Kanchhi@example.com','modi@example.com','maya@example.com','jetli@example.com','john@example.com']",
    "count": 5
}

休息法

@PostMapping(path = "/my", consumes = MediaType.TEXT_PLAIN_VALUE)
    public ResponseEntity<Map> getFriendListByEmail(@Valid @RequestBody String value) { 
                LinkedHashMap<Object, Object> map23 = new LinkedHashMap<>(); 
                myList=userService.getfriendList(value); //getting some list say we have got 5 list of emails
                String s  ="'"+myList.toString().replace("[","").replace("]", "").replace(" ","").replace(",","','")+"'"; 
                map23.put("success", true);
                map23.put("friends", "["+s+"]"); // trying to put the updated string 
                map23.put("count", myList.size());  
                return new ResponseEntity<Map>(map23, HttpStatus.OK);  
    }