diff --git a/src/org/redkale/convert/json/JsonByteBufferWriter.java b/src/org/redkale/convert/json/JsonByteBufferWriter.java
index 4b56da301..6d7d57cf0 100644
--- a/src/org/redkale/convert/json/JsonByteBufferWriter.java
+++ b/src/org/redkale/convert/json/JsonByteBufferWriter.java
@@ -106,6 +106,28 @@ public class JsonByteBufferWriter extends JsonWriter {
         this.buffers[index].put((byte) ch);
     }
 
+    @Override
+    public void writeSmallString(String value) {
+        byte[] bs = Utility.byteArray(value);
+        int expandsize = expand(bs.length + 2);
+        if (expandsize == 0) {// 只需要一个buffer 
+            final ByteBuffer buffer = this.buffers[index];
+            buffer.put((byte) '"');
+            buffer.put(bs);
+            buffer.put((byte) '"');
+        } else {
+            ByteBuffer buffer = this.buffers[index];
+            if (!buffer.hasRemaining()) buffer = nextByteBuffer();
+            buffer.put((byte) '"');
+            for (byte b : bs) {
+                if (!buffer.hasRemaining()) buffer = nextByteBuffer();
+                buffer.put(b);
+            }
+            if (!buffer.hasRemaining()) buffer = nextByteBuffer();
+            buffer.put((byte) '"');
+        }
+    }
+
     @Override
     public void writeTo(final char[] chs, final int start, final int len) {
         writeTo(-1, false, chs, start, len);
diff --git a/src/org/redkale/convert/json/JsonWriter.java b/src/org/redkale/convert/json/JsonWriter.java
index fcc70b0f9..a5761cd3f 100644
--- a/src/org/redkale/convert/json/JsonWriter.java
+++ b/src/org/redkale/convert/json/JsonWriter.java
@@ -162,12 +162,12 @@ public class JsonWriter extends Writer {
     @Override
     public final void writeFieldName(String fieldName, Type fieldType, int fieldPos) {
         if (this.comma) writeTo(',');
-        writeTo(true, fieldName);
+        writeSmallString(fieldName);
         writeTo(':');
     }
 
     @Override
-    public final void writeSmallString(String value) {
+    public void writeSmallString(String value) {
         writeTo(true, value);
     }