diff --git a/src/org/redkale/convert/json/JsonByteBufferReader.java b/src/org/redkale/convert/json/JsonByteBufferReader.java
index a126dc5ec..e9d0d7c01 100644
--- a/src/org/redkale/convert/json/JsonByteBufferReader.java
+++ b/src/org/redkale/convert/json/JsonByteBufferReader.java
@@ -60,7 +60,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return 有效字符或空白字符
      */
     @Override
-    protected char nextChar() {
+    protected final char nextChar() {
         if (currentChar != 0) {
             char ch = currentChar;
             this.currentChar = 0;
@@ -86,7 +86,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return 有效字符
      */
     @Override
-    protected char nextGoodChar() {
+    protected final char nextGoodChar() {
         char c = nextChar();
         if (c > ' ' || c == 0) return c; // 0 表示buffer结尾了
         for (;;) {
@@ -101,7 +101,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @param ch 回退的字符
      */
     @Override
-    protected void backChar(char ch) {
+    protected final void backChar(char ch) {
         this.currentChar = ch;
     }
 
@@ -111,7 +111,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return SIGN_NOLENGTH 或 SIGN_NULL
      */
     @Override
-    public int readObjectB() {
+    public final int readObjectB() {
         char ch = nextGoodChar();
         if (ch == '{') return SIGN_NOLENGTH;
         if (ch == 'n' && nextChar() == 'u' && nextChar() == 'l' && nextChar() == 'l') return SIGN_NULL;
@@ -125,7 +125,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return SIGN_NOLENGTH 或 SIGN_NULL
      */
     @Override
-    public int readArrayB() {
+    public final int readArrayB() {
         char ch = nextGoodChar();
         if (ch == '[' || ch == '{') return SIGN_NOLENGTH;
         if (ch == 'n' && nextChar() == 'u' && nextChar() == 'l' && nextChar() == 'l') return SIGN_NULL;
@@ -137,7 +137,7 @@ public class JsonByteBufferReader extends JsonReader {
      * 判断下一个非空白字符是否:
      */
     @Override
-    public void skipBlank() {
+    public final void skipBlank() {
         char ch = nextGoodChar();
         if (ch == ':') return;
         throw new ConvertException("expected a ':' but '" + ch + "'(position = " + position + ")");
@@ -149,7 +149,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return 是否存在
      */
     @Override
-    public boolean hasNext() {
+    public final boolean hasNext() {
         char ch = nextGoodChar();
         if (ch == ',') return true;
         if (ch == '}' || ch == ']') return false;
@@ -163,7 +163,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return String值
      */
     @Override
-    public String readSmallString() {
+    public final String readSmallString() {
         char ch = nextGoodChar();
         if (ch == 0) return null;
         final StringBuilder sb = new StringBuilder();
@@ -259,7 +259,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return int值
      */
     @Override
-    public int readInt() {
+    public final int readInt() {
         char firstchar = nextGoodChar();
         if (firstchar == '"' || firstchar == '\'') {
             firstchar = nextChar();
@@ -293,7 +293,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return long值
      */
     @Override
-    public long readLong() {
+    public final long readLong() {
         char firstchar = nextGoodChar();
         if (firstchar == '"' || firstchar == '\'') {
             firstchar = nextChar();
@@ -327,7 +327,7 @@ public class JsonByteBufferReader extends JsonReader {
      * @return String值
      */
     @Override
-    public String readString() {
+    public final String readString() {
         return readSmallString();
     }
 
diff --git a/src/org/redkale/convert/json/JsonByteBufferWriter.java b/src/org/redkale/convert/json/JsonByteBufferWriter.java
index a4bd01417..54b50506a 100644
--- a/src/org/redkale/convert/json/JsonByteBufferWriter.java
+++ b/src/org/redkale/convert/json/JsonByteBufferWriter.java
@@ -107,7 +107,7 @@ public final class JsonByteBufferWriter extends JsonWriter {
     }
 
     @Override
-    public void writeTo(final char[] chs, final int start, final int len) {
+    public final void writeTo(final char[] chs, final int start, final int len) {
         writeTo(-1, false, chs, start, len);
     }
 
@@ -194,7 +194,7 @@ public final class JsonByteBufferWriter extends JsonWriter {
         return this.buffers[++this.index];
     }
 
-    private static int encodeUTF8Length(final char[] text, final int start, final int len) {
+    protected static int encodeUTF8Length(final char[] text, final int start, final int len) {
         char c;
         int size = 0;
         final char[] chars = text;
@@ -206,7 +206,7 @@ public final class JsonByteBufferWriter extends JsonWriter {
         return size;
     }
 
-    private static int encodeEscapeUTF8Length(final char[] text, final int start, final int len) {
+    protected static int encodeEscapeUTF8Length(final char[] text, final int start, final int len) {
         char c;
         int size = 0;
         final char[] chars = text;
@@ -239,7 +239,7 @@ public final class JsonByteBufferWriter extends JsonWriter {
      * @param value String值
      */
     @Override
-    public void writeTo(final boolean quote, final String value) {
+    public final void writeTo(final boolean quote, final String value) {
         char[] chs = Utility.charArray(value);
         writeTo(-1, quote, chs, 0, chs.length);
     }
@@ -331,14 +331,14 @@ public final class JsonByteBufferWriter extends JsonWriter {
     }
 
     @Override
-    public void writeField(boolean comma, Attribute attribute) {
+    public final void writeField(boolean comma, Attribute attribute) {
         if (comma) writeTo(',');
         writeTo(true, attribute.field());
         writeTo(':');
     }
 
     @Override
-    public void writeSmallString(String value) {
+    public final void writeSmallString(String value) {
         writeTo(false, value);
     }