diff --git a/src/main/java/org/redkale/convert/json/JsonByteBufferWriter.java b/src/main/java/org/redkale/convert/json/JsonByteBufferWriter.java
index 455ca94c3..c5418d1eb 100644
--- a/src/main/java/org/redkale/convert/json/JsonByteBufferWriter.java
+++ b/src/main/java/org/redkale/convert/json/JsonByteBufferWriter.java
@@ -9,7 +9,6 @@ import java.nio.*;
 import java.nio.charset.Charset;
 import java.util.Objects;
 import java.util.function.Supplier;
-import org.redkale.convert.ConvertException;
 import org.redkale.convert.Encodeable;
 import org.redkale.util.*;
 
@@ -113,20 +112,6 @@ public class JsonByteBufferWriter extends JsonWriter {
         return size;
     }
 
-    @Override
-    public void writeTo(final char ch) {
-        if (ch > Byte.MAX_VALUE) {
-            throw new ConvertException("writeTo char(int.value = " + (int) ch + ") must be less 127");
-        }
-        expand(1);
-        this.buffers[currBufIndex].put((byte) ch);
-    }
-
-    @Override
-    public void writeTo(final char[] chs, final int start, final int len) {
-        writeTo(-1, false, chs, start, len);
-    }
-
     @Override
     public void writeTo(final byte ch) { // 只能是 0 - 127 的字符
         expand(1);
diff --git a/src/main/java/org/redkale/convert/json/JsonBytesWriter.java b/src/main/java/org/redkale/convert/json/JsonBytesWriter.java
index 96514a3f0..e9f6e2d80 100644
--- a/src/main/java/org/redkale/convert/json/JsonBytesWriter.java
+++ b/src/main/java/org/redkale/convert/json/JsonBytesWriter.java
@@ -129,21 +129,6 @@ public class JsonBytesWriter extends JsonWriter implements ByteTuple {
         }
     }
 
-    @Override
-    public void writeTo(final char ch) { // 只能是 0 - 127 的字符
-        expand(1);
-        content[count++] = (byte) ch;
-    }
-
-    @Override
-    public void writeTo(final char[] chs, final int start, final int len) { // 只能是 0 - 127 的字符
-        expand(len);
-        for (int i = 0; i < len; i++) {
-            content[count + i] = (byte) chs[start + i];
-        }
-        count += len;
-    }
-
     @Override
     public void writeTo(final byte ch) { // 只能是 0 - 127 的字符
         expand(1);
diff --git a/src/main/java/org/redkale/convert/json/JsonCharsWriter.java b/src/main/java/org/redkale/convert/json/JsonCharsWriter.java
index 6f83d5dfd..2e1093e2b 100644
--- a/src/main/java/org/redkale/convert/json/JsonCharsWriter.java
+++ b/src/main/java/org/redkale/convert/json/JsonCharsWriter.java
@@ -4,7 +4,10 @@
  */
 package org.redkale.convert.json;
 
+import java.lang.reflect.Type;
+import org.redkale.convert.EnMember;
 import org.redkale.convert.Encodeable;
+import static org.redkale.convert.json.JsonWriter.BYTE_COLON;
 import static org.redkale.convert.json.JsonWriter.BYTE_COMMA;
 import static org.redkale.convert.json.JsonWriter.BYTE_DQUOTE;
 import static org.redkale.convert.json.JsonWriter.DEFAULT_SIZE;
@@ -87,13 +90,11 @@ public class JsonCharsWriter extends JsonWriter {
         return true;
     }
 
-    @Override
     public void writeTo(final char ch) { // 只能是 0 - 127 的字符
         expand(1);
         content[count++] = ch;
     }
 
-    @Override
     public void writeTo(final char[] chs, final int start, final int len) { // 只能是 0 - 127 的字符
         expand(len);
         System.arraycopy(chs, start, content, count, len);
@@ -115,6 +116,19 @@ public class JsonCharsWriter extends JsonWriter {
         count += len;
     }
 
+    @Override // 只容许JsonBytesWriter重写此方法
+    public final void writeField(EnMember member, String fieldName, Type fieldType, int fieldPos) {
+        if (this.comma) {
+            writeTo(BYTE_COMMA);
+        }
+        if (member != null) {
+            writeTo(member.getJsonFieldNameChars());
+        } else {
+            writeLatin1To(true, fieldName);
+            writeTo(BYTE_COLON);
+        }
+    }
+
     /**
      * <b>注意：</b> 该String值不能为null且不会进行转义， 只用于不含需要转义字符的字符串，例如enum、double、BigInteger、BigDecimal转换的String
      *
@@ -305,6 +319,10 @@ public class JsonCharsWriter extends JsonWriter {
         return this.count;
     }
 
+    public final void writeTo(final char... cs) { // 只能是 0 - 127 的字符
+        writeTo(cs, 0, cs.length);
+    }
+
     @Override
     public final void writeNull() {
         writeTo(CHARS_NULL);
diff --git a/src/main/java/org/redkale/convert/json/JsonStreamWriter.java b/src/main/java/org/redkale/convert/json/JsonStreamWriter.java
index f0b490327..f9839de97 100644
--- a/src/main/java/org/redkale/convert/json/JsonStreamWriter.java
+++ b/src/main/java/org/redkale/convert/json/JsonStreamWriter.java
@@ -45,18 +45,6 @@ class JsonStreamWriter extends JsonByteBufferWriter {
         }
     }
 
-    @Override
-    public void writeTo(final char ch) {
-        if (ch > Byte.MAX_VALUE) {
-            throw new ConvertException("writeTo char(int.value = " + (int) ch + ") must be less 127");
-        }
-        try {
-            out.write((byte) ch);
-        } catch (IOException e) {
-            throw new ConvertException(e);
-        }
-    }
-
     @Override
     public void writeTo(final byte[] bs, final int start, final int len) { // 只能是 0 - 127 的字符
         try {
@@ -66,11 +54,6 @@ class JsonStreamWriter extends JsonByteBufferWriter {
         }
     }
 
-    @Override
-    public void writeTo(final char[] chs, final int start, final int len) {
-        writeTo(false, chs, start, len);
-    }
-
     private void writeTo(final boolean quote, final char[] chs, final int start, final int len) {
         try {
             if (quote) {
diff --git a/src/main/java/org/redkale/convert/json/JsonWriter.java b/src/main/java/org/redkale/convert/json/JsonWriter.java
index 449fc09f6..c3f560781 100644
--- a/src/main/java/org/redkale/convert/json/JsonWriter.java
+++ b/src/main/java/org/redkale/convert/json/JsonWriter.java
@@ -57,10 +57,6 @@ public abstract class JsonWriter extends Writer {
     }
 
     // -----------------------------------------------------------------------
-    public abstract void writeTo(final char ch); // 只能是 0 - 127 的字符
-
-    public abstract void writeTo(final char[] cs, final int start, final int len); // 只能是 0 - 127 的字符
-
     public abstract void writeTo(final byte ch); // 只能是 0 - 127 的字符
 
     public abstract void writeTo(final byte[] bs, final int start, final int len); // 只能是 0 - 127 的字符
@@ -252,18 +248,13 @@ public abstract class JsonWriter extends Writer {
         writeLatin1To(true, value);
     }
 
-    @Override // 只容许JsonBytesWriter重写此方法
+    @Override // 只容许JsonCharsWriter重写此方法
     public void writeField(EnMember member, String fieldName, Type fieldType, int fieldPos) {
         if (this.comma) {
             writeTo(BYTE_COMMA);
         }
         if (member != null) {
-            if (charsMode()) {
-                char[] chs = member.getJsonFieldNameChars();
-                writeTo(chs, 0, chs.length);
-            } else {
-                writeTo(member.getJsonFieldNameBytes());
-            }
+            writeTo(member.getJsonFieldNameBytes());
         } else {
             writeLatin1To(true, fieldName);
             writeTo(BYTE_COLON);
@@ -271,9 +262,6 @@ public abstract class JsonWriter extends Writer {
     }
 
     // ----------------------------------------------------------------------------------------------
-    public final void writeTo(final char... cs) { // 只能是 0 - 127 的字符
-        writeTo(cs, 0, cs.length);
-    }
 
     public final void writeTo(final byte[] bs) { // 只能是 0 - 127 的字符
         writeTo(bs, 0, bs.length);
diff --git a/src/test/java/org/redkale/test/convert/json/_DyncFortuneJsonEncoder.java b/src/test/java/org/redkale/test/convert/json/_DyncFortuneJsonEncoder.java
index 3bca5d649..b0fecdca9 100644
--- a/src/test/java/org/redkale/test/convert/json/_DyncFortuneJsonEncoder.java
+++ b/src/test/java/org/redkale/test/convert/json/_DyncFortuneJsonEncoder.java
@@ -30,12 +30,12 @@ public class _DyncFortuneJsonEncoder extends JsonDynEncoder<Fortune> {
             objectEncoderSelf.convertTo(out, value);
             return;
         }
-        out.writeTo('{');
+        out.writeTo((byte) '{');
         if (out.charsMode()) {
             out.writeFieldIntValue(idFieldChars, false, value.getId());
         } else {
             out.writeFieldIntValue(idFieldBytes, false, value.getId());
         }
-        out.writeTo('}');
+        out.writeTo((byte) '}');
     }
 }
diff --git a/src/test/java/org/redkale/test/convert/json/_DyncMessageJsonEncoder.java b/src/test/java/org/redkale/test/convert/json/_DyncMessageJsonEncoder.java
index 4e1568a62..f1271701e 100644
--- a/src/test/java/org/redkale/test/convert/json/_DyncMessageJsonEncoder.java
+++ b/src/test/java/org/redkale/test/convert/json/_DyncMessageJsonEncoder.java
@@ -30,12 +30,12 @@ public class _DyncMessageJsonEncoder extends JsonDynEncoder<Message> {
             objectEncoderSelf.convertTo(out, value);
             return;
         }
-        out.writeTo('{');
+        out.writeTo((byte) '{');
         if (out.charsMode()) {
             out.writeFieldStandardStringValue(messageFieldChars, false, value.getMessage());
         } else {
             out.writeFieldStandardStringValue(messageFieldBytes, false, value.getMessage());
         }
-        out.writeTo('}');
+        out.writeTo((byte) '}');
     }
 }
diff --git a/src/test/java/org/redkale/test/convert/json/_DyncUserJsonEncoder.java b/src/test/java/org/redkale/test/convert/json/_DyncUserJsonEncoder.java
index 8fa4f99aa..490a102b0 100644
--- a/src/test/java/org/redkale/test/convert/json/_DyncUserJsonEncoder.java
+++ b/src/test/java/org/redkale/test/convert/json/_DyncUserJsonEncoder.java
@@ -44,7 +44,7 @@ public class _DyncUserJsonEncoder extends JsonDynEncoder<User> {
             this.objectEncoderSelf.convertTo(out, value);
             return;
         }
-        out.writeTo('{');
+        out.writeTo((byte) '{');
         boolean comma = false;
         if (out.charsMode()) {
             comma = out.writeFieldIntValue(ageFieldChars, comma, value.getAge());
@@ -63,6 +63,6 @@ public class _DyncUserJsonEncoder extends JsonDynEncoder<User> {
             comma = out.writeFieldStringValue(sexFieldBytes, comma, value.getSex());
             out.writeFieldStringValue(nickNameFieldBytes, comma, value.getNickName());
         }
-        out.writeTo('}');
+        out.writeTo((byte) '}');
     }
 }
diff --git a/src/test/java/org/redkale/test/convert/json/_DyncWorldJsonEncoder.java b/src/test/java/org/redkale/test/convert/json/_DyncWorldJsonEncoder.java
index 293e27ffb..0e3516e57 100644
--- a/src/test/java/org/redkale/test/convert/json/_DyncWorldJsonEncoder.java
+++ b/src/test/java/org/redkale/test/convert/json/_DyncWorldJsonEncoder.java
@@ -32,7 +32,7 @@ public class _DyncWorldJsonEncoder extends JsonDynEncoder<World> {
             return;
         }
 
-        out.writeTo('{');
+        out.writeTo((byte) '{');
         boolean comma = false;
         if (out.charsMode()) {
             comma = out.writeFieldIntValue(idFieldChars, comma, value.getId());
@@ -41,6 +41,6 @@ public class _DyncWorldJsonEncoder extends JsonDynEncoder<World> {
             comma = out.writeFieldIntValue(idFieldBytes, comma, value.getId());
             out.writeFieldIntValue(randomNumberFieldBytes, comma, value.getRandomNumber());
         }
-        out.writeTo('}');
+        out.writeTo((byte) '}');
     }
 }