自定义注解绑定FormModel参数

 

/**
 * <p>绑定当前登录的用户</p>
 * <p>不同于@ModelAttribute</p>
 *
 * @author Zhang Kaitao
 */
@Target({ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CurrentUser {

    /**
     * 当前用户在request中的名字
     *
     * @return
     */
    String value() default Constants.CURRENT_USER;

}

 

public class CurrentUserMethodArgumentResolver implements HandlerMethodArgumentResolver {

    public CurrentUserMethodArgumentResolver() {
    }

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        if (parameter.hasParameterAnnotation(CurrentUser.class)) {
            return true;
        }
        return false;
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
        CurrentUser currentUserAnnotation = parameter.getParameterAnnotation(CurrentUser.class);
        return webRequest.getAttribute(currentUserAnnotation.value(), NativeWebRequest.SCOPE_REQUEST);
    }
}

 

@RequestMapping("/")
    public String index(@CurrentUser User loginUser, Model model) {
        Set<String> permissions = userService.findPermissions(loginUser.getUsername());
        List<Resource> menus = resourceService.findMenus(permissions);
        model.addAttribute("menus", menus);
        return "index";
    }

 

来源于http://jinnianshilongnian.iteye.com/整理的代码