public class Model{
    private List<String> strings;
}

@RestController
@RequestMapping("/controller")
public class Controller {

    //原来的（修改前）
    @PostMapping("/addModel")
        public AjaxResult addModel(Model model){
        //.........
    }

    //修改后
    @PostMapping("/addModel")
    public AjaxResult addModel(JSONObject json){
        //.........
        Model model = JSONObject.parseObject(json.toJSONString(),Model.class);
    }
}    

@InitBinder
protected void initBinder(WebDataBinder binder) {
    binder.setAutoGrowNestedPaths(true);
    binder.setAutoGrowCollectionLimit(1024);
}