Java 为什么我的thymeleaf标签th：文本不起作用

在admin.html中，我有标记th:text=${name}。它不显示来自控制器的值。为什么?

Admin.html

我的MVC配置是

---

因为从/admin操作中，您必须传递名称，而不是登录名

    @RequestMapping(value = "/admin", method = RequestMethod.GET)
    public String admin(Model model) {
    Authentication authentication =SecurityContextHolder.getContext().getAuthentication();

    model.addAttribute("name",authentication.getName());

    retrun "admin" ;

    }

---

或者您可以设置RedirectAttributes

改进的代码格式当您使用redirect:，这是一个全新的调用。旧请求中没有保留任何模型属性。请使用@GetMapping进行简化。包括返回管理；最后

@RequestMapping(value = "/login", method = RequestMethod.POST)
public String login(@ModelAttribute("userForm") User userForm, Model model) {

    try {            
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

        model.addAttribute("name",authentication.getName());

        if (securityService.isAdmin(userForm.getUsername())) {
            return "redirect:/admin";
        }
    } catch (RestException e) {
        model.addAttribute("error", "User with username '"+userForm.getUsername()+"' not found");
    }

    return "redirect:/index";
}

@Configuration
@EnableWebMvc
@ComponentScan({ "ru.dev.avtonomki" })
public class WebMVCConfig extends WebMvcConfigurerAdapter implements ApplicationContextAware {

    private ApplicationContext applicationContext;

    public void setApplicationContext(ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }

    @Bean
    public ViewResolver htmlViewResolver() {
        ThymeleafViewResolver resolver = new ThymeleafViewResolver();
        resolver.setTemplateEngine(templateEngine(jspTemplateResolver()));
        resolver.setContentType("text/html");
        resolver.setCharacterEncoding("UTF-8");
        resolver.setOrder(1);
        resolver.setViewNames(ArrayUtil.array("*.html"));
        return resolver;
    }

      private TemplateEngine templateEngine(ITemplateResolver templateResolver) {
            SpringTemplateEngine engine = new SpringTemplateEngine();
            engine.addDialect(new LayoutDialect(new GroupingStrategy()));
            engine.addDialect(new Java8TimeDialect());
            engine.setTemplateResolver(templateResolver);
            return engine;
      }

    private ITemplateResolver htmlTemplateResolver() {
        SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
        resolver.setApplicationContext(applicationContext);
        resolver.setPrefix("/WEB-INF/templates/");
        resolver.setCacheable(false);
        resolver.setTemplateMode(TemplateMode.HTML5);
        return resolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
    }
}

    @RequestMapping(value = "/admin", method = RequestMethod.GET)
    public String admin(Model model) {
    Authentication authentication =SecurityContextHolder.getContext().getAuthentication();

    model.addAttribute("name",authentication.getName());

    retrun "admin" ;

    }