diff --git a/src/org/redkale/convert/AnyEncoder.java b/src/org/redkale/convert/AnyEncoder.java
index 344e232e0..1bba9b1b4 100644
--- a/src/org/redkale/convert/AnyEncoder.java
+++ b/src/org/redkale/convert/AnyEncoder.java
@@ -9,8 +9,10 @@ import java.lang.reflect.Type;
 
 /**
  * 对不明类型的对象进行序列化； BSON序列化时将对象的类名写入Writer，JSON则不写入。
+ * <p>
+ * <p>
+ * 详情见: http://redkale.org
  *
- * <p> 详情见: http://redkale.org
  * @author zhangjx
  * @param <T> 序列化的泛型类型
  */
@@ -26,10 +28,10 @@ public final class AnyEncoder<T> implements Encodeable<Writer, T> {
     @SuppressWarnings("unchecked")
     public void convertTo(final Writer out, final T value) {
         if (value == null) {
-            out.wirteClassName(null);
+            out.writeClassName(null);
             out.writeNull();
         } else {
-            out.wirteClassName(factory.getEntity(value.getClass()));
+            if (out.needWriteClassName()) out.writeClassName(factory.getEntityAlias(value.getClass()));
             factory.loadEncoder(value.getClass()).convertTo(out, value);
         }
     }
diff --git a/src/org/redkale/convert/ConvertEntity.java b/src/org/redkale/convert/ConvertEntity.java
index 51ba2cf3a..cc0f2bc85 100644
--- a/src/org/redkale/convert/ConvertEntity.java
+++ b/src/org/redkale/convert/ConvertEntity.java
@@ -5,14 +5,14 @@
  */
 package org.redkale.convert;
 
-import java.lang.annotation.*;
 import static java.lang.annotation.ElementType.TYPE;
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
+import java.lang.annotation.*;
 
 /**
  * 用于类名的别名， 类似javax.persistence.Table
  * 该值必须是全局唯一
- * 使用场景: 当BSON序列化为了不指定class可以使用@ConvertEntity来取个别名。关联方法:  Reader.readClassName() 和  Writer.wirteClassName(String value) 。
+ * 使用场景: 当BSON序列化为了不指定class可以使用@ConvertEntity来取个别名。关联方法:  Reader.readClassName() 和  Writer.writeClassName(String value) 。
  *
  * <p> 详情见: http://redkale.org
  * @author zhangjx
diff --git a/src/org/redkale/convert/ConvertFactory.java b/src/org/redkale/convert/ConvertFactory.java
index c83ebb163..dc55dea10 100644
--- a/src/org/redkale/convert/ConvertFactory.java
+++ b/src/org/redkale/convert/ConvertFactory.java
@@ -5,17 +5,14 @@
  */
 package org.redkale.convert;
 
-import java.lang.reflect.Type;
-import java.util.Collection;
-import java.util.Map;
 import java.lang.reflect.*;
 import java.math.BigInteger;
 import java.net.*;
-import java.nio.channels.*;
-import static org.redkale.convert.ext.InetAddressSimpledCoder.*;
+import java.nio.channels.CompletionHandler;
 import java.util.*;
-import java.util.concurrent.*;
-import java.util.regex.*;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Pattern;
+import org.redkale.convert.ext.InetAddressSimpledCoder.InetSocketAddressSimpledCoder;
 import org.redkale.convert.ext.*;
 import org.redkale.util.*;
 
@@ -175,19 +172,14 @@ public abstract class ConvertFactory<R extends Reader, W extends Writer> {
         return fname;
     }
 
-    final String getEntity(Class clazz) {
+    final String getEntityAlias(Class clazz) {
         ConvertEntity ce = (ConvertEntity) clazz.getAnnotation(ConvertEntity.class);
-        if (ce != null && findEntity(ce.value()) == null) entitys.put(ce.value(), clazz);
+        if (ce != null && findEntityAlias(ce.value()) == null) entitys.put(ce.value(), clazz);
         return ce == null ? clazz.getName() : ce.value();
     }
 
-    private Class findEntity(String name) {
-        Class clazz = entitys.get(name);
-        return parent == null ? clazz : parent.findEntity(name);
-    }
-
-    final Class getEntity(String name) {
-        Class clazz = findEntity(name);
+    final Class getEntityAlias(String name) {
+        Class clazz = findEntityAlias(name);
         try {
             return clazz == null ? Class.forName(name) : clazz;
         } catch (Exception ex) {
@@ -195,6 +187,11 @@ public abstract class ConvertFactory<R extends Reader, W extends Writer> {
         }
     }
 
+    private Class findEntityAlias(String name) {
+        Class clazz = entitys.get(name);
+        return parent == null ? clazz : parent.findEntityAlias(name);
+    }
+
     /**
      * 使所有类的所有被声明为ConvertColumn.ignore = true 的字段或方法变为ConvertColumn.ignore = false
      *
diff --git a/src/org/redkale/convert/ObjectDecoder.java b/src/org/redkale/convert/ObjectDecoder.java
index a550a4998..baf98ccb9 100644
--- a/src/org/redkale/convert/ObjectDecoder.java
+++ b/src/org/redkale/convert/ObjectDecoder.java
@@ -167,7 +167,7 @@ public final class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T
     public final T convertFrom(final R in) {
         final String clazz = in.readObjectB(typeClass);
         if (clazz == null) return null;
-        if (!clazz.isEmpty()) return (T) factory.loadDecoder(factory.getEntity(clazz)).convertFrom(in);
+        if (!clazz.isEmpty()) return (T) factory.loadDecoder(factory.getEntityAlias(clazz)).convertFrom(in);
         if (!this.inited) {
             synchronized (lock) {
                 try {
diff --git a/src/org/redkale/convert/ObjectEncoder.java b/src/org/redkale/convert/ObjectEncoder.java
index 5ac10494a..679c40679 100644
--- a/src/org/redkale/convert/ObjectEncoder.java
+++ b/src/org/redkale/convert/ObjectEncoder.java
@@ -5,7 +5,6 @@
  */
 package org.redkale.convert;
 
-import org.redkale.util.Attribute;
 import java.lang.reflect.*;
 import java.util.*;
 import org.redkale.util.*;
@@ -124,7 +123,7 @@ public final class ObjectEncoder<W extends Writer, T> implements Encodeable<W, T
         }
         if (value != null && value.getClass() != this.typeClass) {
             final Class clz = value.getClass();
-            out.wirteClassName(factory.getEntity(clz));
+            if (out.needWriteClassName()) out.writeClassName(factory.getEntityAlias(clz));
             factory.loadEncoder(clz).convertTo(out, value);
             return;
         }
diff --git a/src/org/redkale/convert/Writer.java b/src/org/redkale/convert/Writer.java
index e2d3a9964..e8f563199 100644
--- a/src/org/redkale/convert/Writer.java
+++ b/src/org/redkale/convert/Writer.java
@@ -31,12 +31,19 @@ public abstract class Writer {
      */
     public abstract void writeNull();
 
+    /**
+     * 是否需要写入类名, BSON需要， JSON不需要
+     *
+     * @return boolean
+     */
+    public abstract boolean needWriteClassName();
+    
     /**
      * 写入类名
      *
      * @param clazz 类名
      */
-    public abstract void wirteClassName(String clazz);
+    public abstract void writeClassName(String clazz);
 
     /**
      * 输出一个对象前的操作
@@ -54,7 +61,7 @@ public abstract class Writer {
      * @param clazz 对象的类名
      */
     public final void writeObjectNull(final Class clazz) {
-        wirteClassName(null);
+        writeClassName(null);
         writeNull();
     }
 
diff --git a/src/org/redkale/convert/bson/BsonWriter.java b/src/org/redkale/convert/bson/BsonWriter.java
index 501167d10..e9aa5f811 100644
--- a/src/org/redkale/convert/bson/BsonWriter.java
+++ b/src/org/redkale/convert/bson/BsonWriter.java
@@ -5,8 +5,8 @@
  */
 package org.redkale.convert.bson;
 
-import java.nio.*;
-import java.util.function.*;
+import java.nio.ByteBuffer;
+import java.util.function.Predicate;
 import org.redkale.convert.*;
 import org.redkale.util.*;
 
@@ -154,7 +154,7 @@ public class BsonWriter extends Writer {
     @Override
     public final void writeLong(long value) {
         writeTo((byte) (value >> 56), (byte) (value >> 48), (byte) (value >> 40), (byte) (value >> 32),
-                (byte) (value >> 24), (byte) (value >> 16), (byte) (value >> 8), (byte) value);
+            (byte) (value >> 24), (byte) (value >> 16), (byte) (value >> 8), (byte) value);
     }
 
     @Override
@@ -168,7 +168,12 @@ public class BsonWriter extends Writer {
     }
 
     @Override
-    public final void wirteClassName(String clazz) {
+    public final boolean needWriteClassName() {
+        return true;
+    }
+
+    @Override
+    public final void writeClassName(String clazz) {
         writeSmallString(clazz == null ? "" : clazz);
     }
 
@@ -186,7 +191,7 @@ public class BsonWriter extends Writer {
     }
 
     @Override
-    public final void writeFieldName( Attribute attribute) {
+    public final void writeFieldName(Attribute attribute) {
         writeByte(BsonReader.SIGN_HASNEXT);
         writeSmallString(attribute.field());
         byte typeval = 127;  //字段的类型值
diff --git a/src/org/redkale/convert/json/JsonWriter.java b/src/org/redkale/convert/json/JsonWriter.java
index 957531db2..6fda666e4 100644
--- a/src/org/redkale/convert/json/JsonWriter.java
+++ b/src/org/redkale/convert/json/JsonWriter.java
@@ -5,14 +5,14 @@
  */
 package org.redkale.convert.json;
 
-import java.nio.*;
-import org.redkale.convert.*;
+import java.nio.ByteBuffer;
+import org.redkale.convert.Writer;
 import org.redkale.util.*;
 
 /**
  *
  * writeTo系列的方法输出的字符不能含特殊字符
- *
+ * <p>
  * <p>
  * 详情见: http://redkale.org
  *
@@ -123,22 +123,28 @@ public class JsonWriter extends Writer {
         content[count++] = '"';
         for (char ch : Utility.charArray(value)) {
             switch (ch) {
-                case '\n': content[count++] = '\\';
+                case '\n':
+                    content[count++] = '\\';
                     content[count++] = 'n';
                     break;
-                case '\r': content[count++] = '\\';
+                case '\r':
+                    content[count++] = '\\';
                     content[count++] = 'r';
                     break;
-                case '\t': content[count++] = '\\';
+                case '\t':
+                    content[count++] = '\\';
                     content[count++] = 't';
                     break;
-                case '\\': content[count++] = '\\';
+                case '\\':
+                    content[count++] = '\\';
                     content[count++] = ch;
                     break;
-                case '"': content[count++] = '\\';
+                case '"':
+                    content[count++] = '\\';
                     content[count++] = ch;
                     break;
-                default: content[count++] = ch;
+                default:
+                    content[count++] = ch;
                     break;
             }
         }
@@ -293,7 +299,12 @@ public class JsonWriter extends Writer {
     }
 
     @Override
-    public final void wirteClassName(String clazz) {
+    public final boolean needWriteClassName() {
+        return false;
+    }
+
+    @Override
+    public final void writeClassName(String clazz) {
     }
 
     @Override