添加枚举字段注解扫描注入

src/main/java/quant/rich/emoney/interceptor/EnumOptionsInterceptor.java

@@ -0,0 +1,113 @@
+package quant.rich.emoney.interceptor;
+
+
+import org.reflections.Reflections;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.annotation.AliasFor;
+import org.springframework.lang.Nullable;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.method.HandlerMethod;
+import org.springframework.web.servlet.*;
+
+import jakarta.servlet.http.*;
+import lombok.extern.slf4j.Slf4j;
+
+import java.lang.reflect.*;
+import java.util.*;
+import java.util.Map.Entry;
+import java.lang.annotation.*;
+
+@Component
+@Slf4j
+public class EnumOptionsInterceptor implements HandlerInterceptor {
+
+    @Autowired
+    Reflections reflections;
+    
+    private Map<String, Map<String, Enum<?>>> options = null;
+    
+    private Map<String, String> optionNameMap = new HashMap<>();
+
+    @Override
+    public boolean preHandle(HttpServletRequest request,
+                           HttpServletResponse response,
+                           Object handler) throws Exception {
+        
+        // 只在 Controller（HandlerMethod）里才做注入
+        if (!(handler instanceof HandlerMethod)) {
+            // 静态资源、图片、css、js 都会被 ResourceHttpRequestHandler 处理，
+            // 这里一律跳过
+            return true;
+        }
+
+        // 排除 @ResponseBody/json 接口
+        HandlerMethod hm = (HandlerMethod) handler;
+        if (hm.hasMethodAnnotation(ResponseBody.class) 
+         || hm.getBeanType().isAnnotationPresent(RestController.class)) {
+            return true;
+        }
+        
+        if (options == null) {
+            options = new HashMap<>();
+            Set<Field> enumOptionFields = reflections.getFieldsAnnotatedWith(EnumOptions.class);
+            for (Field f : enumOptionFields) {
+                if (!f.isAnnotationPresent(EnumOptions.class)) continue;
+                if (!Enum.class.isAssignableFrom(f.getType())) continue;
+    
+                // 拿到注解和名前缀
+                EnumOptions anno = f.getAnnotation(EnumOptions.class);
+                String prefix = anno.value().isBlank() ?
+                        f.getName() + "Enum" :
+                        anno.value();
+                
+                prefix = prefix.toUpperCase().charAt(0) + prefix.substring(1);
+                
+                if (optionNameMap.containsKey(prefix)) {
+                    log.warn("EnumOption name {}:{} has already been taken by {}, please check",
+                            prefix, f.getType().getName(), optionNameMap.get(prefix));
+                    continue;
+                }
+                
+                optionNameMap.put(prefix, f.getType().getName());
+    
+                // enum 值列表
+                @SuppressWarnings("unchecked")
+                Class<? extends Enum<?>> enumType = (Class<? extends Enum<?>>) f.getType();
+                Enum<?>[] constants = enumType.getEnumConstants();
+    
+                // 构造 Map<name, constant>
+                Map<String, Enum<?>> optionsMap = new LinkedHashMap<>();
+                for (Enum<?> c : constants) {
+                    optionsMap.put(c.name(), c);
+                }
+    
+                // 放到 Model 里
+                options.put(prefix, optionsMap);
+            }
+
+        }
+        for (Entry<String, Map<String, Enum<?>>> entry : options.entrySet()) {
+            request.setAttribute(entry.getKey(), entry.getValue());
+            log.debug("Inject enums {}: {} to request {}",
+                    entry.getKey(), optionNameMap.get(entry.getKey()),
+                    request.getRequestURI());
+        }
+        return true;
+    }
+    
+    
+    @Target(ElementType.FIELD)
+    @Retention(RetentionPolicy.RUNTIME)
+    @Documented
+    public static @interface EnumOptions {
+        /**
+         * 注入到 Model 时用的属性名前缀，
+         * 默认：字段名 + "Options"
+         */
+        String value() default "";
+    }
+    
+    
+}