java - 当我将数据从 Jsp 提交到 spring 控制器时 @ModelAttribute 为空

Question

当我从 Jsp 提交数据时spring controller @ModelAttribute为空。请帮我解决这个问题。

@Controller
@RequestMapping("/mainCategory")
public class MainCategoryController {

    @RequestMapping(value = "/test", method = RequestMethod.GET)
    public ModelAndView load() {
        ModelAndView modelAndView = new ModelAndView("mainCatTile","mainCategory", new MainCategory());
        return modelAndView;
    }
    
    @ResponseBody
    @RequestMapping(value = "/save", method = RequestMethod.POST, headers = "Accept=application/json")
    public Object save(@ModelAttribute MainCategory mainCategory, ModelMap modelMap,BindingResult result) {
        

        System.out.println("");
        return null;
    }
    
}

标签： javaspringspring-mvcjsp