children返回不为空的字段

nightFragrance-massage/src/main/java/com/ylx/massage/domain/vo/AreaTreeNode.java

@@ -1,10 +1,12 @@
 package com.ylx.massage.domain.vo;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import lombok.Data;
 
 import java.util.List;
 
 @Data
+@JsonInclude(JsonInclude.Include.NON_EMPTY)
 public class AreaTreeNode {
     private Long id;
     private String code;