diff --git a/.github/workflows/maven_snapshot.yml b/.github/workflows/maven_snapshot.yml
index 9b9dff166..accfec89c 100644
--- a/.github/workflows/maven_snapshot.yml
+++ b/.github/workflows/maven_snapshot.yml
@@ -29,5 +29,6 @@ jobs:
     - name: Build with Maven
       run: mvn --batch-mode -e -X clean deploy -DskipTests=true
       env:
-        MAVEN_GPG_KEY: aaaaaa
+        MAVEN_GPG_KEY: ${{ secrets.OSSRHGPGKEY }}
         MAVEN_GPG_PASSPHRASE: ${{ secrets.OSSRHGPGPASSWORD }}
+        MAVEN_GPG_KEY_FINGERPRINT: CD4C40E804D972E2569BF61A4E3BD7A9E43CC39E
diff --git a/src/main/java/org/redkale/convert/ConvertCoder.java b/src/main/java/org/redkale/convert/ConvertCoder.java
index acbbed3ef..633eee637 100644
--- a/src/main/java/org/redkale/convert/ConvertCoder.java
+++ b/src/main/java/org/redkale/convert/ConvertCoder.java
@@ -2,11 +2,10 @@
  */
 package org.redkale.convert;
 
+import java.lang.annotation.*;
 import static java.lang.annotation.ElementType.*;
 import static java.lang.annotation.RetentionPolicy.*;
 
-import java.lang.annotation.*;
-
 /**
  * 依附在setter、getter方法、字段进行简单的配置 <br>
  * 优先使用coder字段
@@ -42,7 +41,11 @@ public @interface ConvertCoder {
 
     /**
      * 序列化定制化的 Encodeable, 构造函数的参数可以是：<br>
-     * 1、ConvertFactory 2、Type 3、Class 4、ConvertFactory和Type 5、ConvertFactory和Class
+     * 1、ConvertFactory   <br>
+     * 2、Type   <br>
+     * 3、Class   <br>
+     * 4、ConvertFactory和Type   <br>
+     * 5、ConvertFactory和Class  <br>
      *
      * <p>类如果存在instance单实例对象字段值，则优先使用instance对象
      *
@@ -52,7 +55,11 @@ public @interface ConvertCoder {
 
     /**
      * 反序列化定制化的 Decodeable, 构造函数的参数可以是：<br>
-     * 1、ConvertFactory 2、Type 3、Class 4、ConvertFactory和Type 5、ConvertFactory和Class
+     * 1、ConvertFactory   <br>
+     * 2、Type   <br>
+     * 3、Class   <br>
+     * 4、ConvertFactory和Type   <br>
+     * 5、ConvertFactory和Class  <br>
      *
      * <p>类如果存在instance单实例对象字段值，则优先使用instance对象
      *
diff --git a/src/main/java/org/redkale/convert/ConvertColumn.java b/src/main/java/org/redkale/convert/ConvertColumn.java
index 581e90a79..a1837e981 100644
--- a/src/main/java/org/redkale/convert/ConvertColumn.java
+++ b/src/main/java/org/redkale/convert/ConvertColumn.java
@@ -5,11 +5,10 @@
  */
 package org.redkale.convert;
 
+import java.lang.annotation.*;
 import static java.lang.annotation.ElementType.*;
 import static java.lang.annotation.RetentionPolicy.*;
 
-import java.lang.annotation.*;
-
 /**
  * 依附在setter、getter方法、字段进行简单的配置
  *
@@ -51,6 +50,15 @@ public @interface ConvertColumn {
      */
     ConvertType type() default ConvertType.ALL;
 
+    /**
+     * 字段值转换器
+     *
+     * @return ConvertColumnTransfer实现类
+     *
+     * @since 2.8.0
+     */
+    Class<? extends ConvertColumnTransfer> tranfer() default ConvertColumnTransfer.class;
+
     /**
      * ConvertColumn 的多用类
      *
diff --git a/src/main/java/org/redkale/convert/ConvertColumnTransfer.java b/src/main/java/org/redkale/convert/ConvertColumnTransfer.java
new file mode 100644
index 000000000..7b7d70da5
--- /dev/null
+++ b/src/main/java/org/redkale/convert/ConvertColumnTransfer.java
@@ -0,0 +1,16 @@
+/*
+
+*/
+
+package org.redkale.convert;
+
+import org.redkale.util.Attribute;
+
+/**
+ *
+ * @author zhangjx
+ * @param <F> 字段类型
+ */
+public interface ConvertColumnTransfer<F> {
+    public <A> A transfer(Object obj, Attribute attribute, F value);
+}
diff --git a/src/main/java/org/redkale/convert/EnMember.java b/src/main/java/org/redkale/convert/EnMember.java
index 9f83f0fa2..1f1303095 100644
--- a/src/main/java/org/redkale/convert/EnMember.java
+++ b/src/main/java/org/redkale/convert/EnMember.java
@@ -106,6 +106,10 @@ public final class EnMember<W extends Writer, T, F> {
         return new EnMember<>(attribute, factory.loadEncoder(fieldtype), null, null);
     }
 
+    public F getFieldValue(T obj) {
+        return attribute.get(obj);
+    }
+
     public final boolean accepts(String name) {
         return attribute.field().equals(name);
     }
diff --git a/src/main/java/org/redkale/convert/Writer.java b/src/main/java/org/redkale/convert/Writer.java
index 77760fc9c..b5167b1e4 100644
--- a/src/main/java/org/redkale/convert/Writer.java
+++ b/src/main/java/org/redkale/convert/Writer.java
@@ -141,7 +141,7 @@ public abstract class Writer {
     public void writeObjectField(final EnMember member, Object obj) {
         Object value;
         if (objFieldFunc == null) {
-            value = member.attribute.get(obj);
+            value = member.getFieldValue(obj);
         } else {
             value = objFieldFunc.apply(member.attribute, obj);
         }
diff --git a/src/main/java/org/redkale/convert/proto/ProtobufWriter.java b/src/main/java/org/redkale/convert/proto/ProtobufWriter.java
index 15e6a0b4d..281d62d38 100644
--- a/src/main/java/org/redkale/convert/proto/ProtobufWriter.java
+++ b/src/main/java/org/redkale/convert/proto/ProtobufWriter.java
@@ -414,7 +414,7 @@ public class ProtobufWriter extends Writer implements ByteTuple {
     public void writeObjectField(final EnMember member, Object obj) {
         Object value;
         if (objFieldFunc == null) {
-            value = member.getAttribute().get(obj);
+            value = member.getFieldValue(obj);
         } else {
             value = objFieldFunc.apply(member.getAttribute(), obj);
         }