TASK:模块化；

src/main/java/com/ai/da/model/dto/LibraryUploadDTO.java

@@ -40,4 +40,6 @@ public class LibraryUploadDTO {
 
     private String modelSex;
 
+    private String ageGroup;
+
 }

src/main/java/com/ai/da/model/enums/AgeGroup.java

@@ -0,0 +1,31 @@
+package com.ai.da.model.enums;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+import lombok.Data;
+
+public enum AgeGroup implements IEnumDisplay {
+    ADULT("Adult"),
+    CHILD("Child")
+    ;
+
+    private String value;
+
+    AgeGroup(String value) {
+        this.value = value;
+    }
+
+    @Override
+    @JsonValue
+    public String getValue() {
+        return this.value;
+    }
+
+    public static AgeGroup getAgeGroup(String value) {
+        for (AgeGroup group : values()) {
+            if (group.value.equalsIgnoreCase(value)) {
+                return group;
+            }
+        }
+        throw new IllegalArgumentException("No matching constant for [" + value + "]");
+    }
+}