Utiliser Java pour écrire des fonctions de mise en cache et d'optimisation des données de formulaire

public class FormData {
    private String username;
    private String email;

    // 构造函数、getter和setter方法省略

    @Override
    public String toString() {
        return "FormData{" +
                "username='" + username + ''' +
                ", email='" + email + ''' +
                '}';
    }
}

public class FormDataCache {
    private static Map<Long, FormData> cache = new ConcurrentHashMap<>();

    public static FormData getFormDataById(Long id) {
        return cache.get(id);
    }

    public static void putFormData(FormData formData) {
        cache.put(formData.getId(), formData);
    }

    public static void removeFormDataById(Long id) {
        cache.remove(id);
    }

    public static List<FormData> getAllFormData() {
        return new ArrayList<>(cache.values());
    }
}

@RestController
@RequestMapping("/form")
public class FormController {
    @Autowired
    private FormDataCache formDataCache;

    @GetMapping("/{id}")
    public FormData getFormDataById(@PathVariable Long id) {
        return formDataCache.getFormDataById(id);
    }

    @PostMapping("/")
    public void createFormData(@RequestBody FormData formData) {
        formDataCache.putFormData(formData);
    }

    @PutMapping("/{id}")
    public void updateFormDataById(@PathVariable Long id, @RequestBody FormData formData) {
        formData.setId(id);
        formDataCache.putFormData(formData);
    }

    @DeleteMapping("/{id}")
    public void deleteFormDataById(@PathVariable Long id) {
        formDataCache.removeFormDataById(id);
    }

    @GetMapping("/")
    public List<FormData> getAllFormData() {
        return formDataCache.getAllFormData();
    }
}

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.example.form")
public class AppConfig implements WebMvcConfigurer {

    @Bean
    public FormDataCache formDataCache() {
        return new FormDataCache();
    }

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
    }
}

public class WebAppInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
        context.register(AppConfig.class);
        context.setServletContext(servletContext);
        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcherServlet", new DispatcherServlet(context));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");
    }
}