diff --git a/das/src/main/java/com/das/modules/equipment/entity/SysEquipmentDocs.java b/das/src/main/java/com/das/modules/equipment/entity/SysEquipmentDocs.java
index ced4545c..27e01eb0 100644
--- a/das/src/main/java/com/das/modules/equipment/entity/SysEquipmentDocs.java
+++ b/das/src/main/java/com/das/modules/equipment/entity/SysEquipmentDocs.java
@@ -4,6 +4,8 @@ import com.baomidou.mybatisplus.annotation.TableField;
 import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
 import com.fasterxml.jackson.annotation.JsonFormat;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
@@ -17,6 +19,7 @@ import java.util.Date;
 @AllArgsConstructor
 public class SysEquipmentDocs {
 
+    @JsonSerialize(using = ToStringSerializer.class)
     @TableId(value = "id")
     private Long id;