diff --git a/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java b/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java
index 0f909f978..b35c5e02a 100644
--- a/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java
+++ b/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java
@@ -104,6 +104,49 @@ public class JsonByteBufferReader extends JsonReader {
         }
     }
 
+    /**
+     * 跳过空白字符、单行或多行注释， 返回一个非空白字符
+     *
+     * @param allowComment 是否容许含注释
+     * @return 有效字符
+     */
+    protected char nextGoodChar(boolean allowComment) {
+        char c;
+        for (; ; ) {
+            c = nextChar();
+            if (c == 0) {
+                return c; // 0 表示buffer结尾了
+            }
+            if (c > ' ') {
+                if (allowComment && c == '/') { // 支持单行和多行注释
+                    char n = nextChar();
+                    if (n == '/') {
+                        for (; ; ) {
+                            if (nextChar() == '\n') {
+                                break;
+                            }
+                        }
+                        return nextGoodChar(allowComment);
+                    } else if (n == '*') {
+                        char nc;
+                        char lc = 0;
+                        for (; ; ) {
+                            nc = nextChar();
+                            if (nc == '/' && lc == '*') {
+                                break;
+                            }
+                            lc = nc;
+                        }
+                        return nextGoodChar(allowComment);
+                    } else {
+                        throw new ConvertException("illegal escape(" + n + ") (position = " + this.position + ")");
+                    }
+                }
+                return c;
+            }
+        }
+    }
+
     /**
      * 回退最后读取的字符
      *
@@ -166,16 +209,7 @@ public class JsonByteBufferReader extends JsonReader {
             return SIGN_NULL;
         }
         int pos = this.position;
-        StringBuilder sb = new StringBuilder();
-        sb.append(ch);
-        char one;
-        try {
-            while ((one = nextChar()) != 0) sb.append(one);
-        } catch (Exception e) {
-            // do nothing
-        }
-        throw new ConvertException(
-                "a json array text must begin with '[' (position = " + pos + ") but '" + ch + "' in (" + sb + ")");
+        throw new ConvertException("a json array must begin with '[' (position = " + pos + ") but '" + ch + "'");
     }
 
     /** 判断下一个非空白字符是否: */
@@ -185,16 +219,7 @@ public class JsonByteBufferReader extends JsonReader {
         if (ch == ':') {
             return;
         }
-        int pos = this.position;
-        StringBuilder sb = new StringBuilder();
-        sb.append(ch);
-        char one;
-        try {
-            while ((one = nextChar()) != 0) sb.append(one);
-        } catch (Exception e) {
-            // do nothing
-        }
-        throw new ConvertException("expected a ':' but '" + ch + "'(position = " + pos + ") in (" + sb + ")");
+        throw new ConvertException("expected a ':' but '" + ch + "'(position = " + this.position + ")");
     }
 
     /**
@@ -477,16 +502,6 @@ public class JsonByteBufferReader extends JsonReader {
         return readString(true);
     }
 
-    /**
-     * 读取字符串， 必须是"或者'包围的字符串值
-     *
-     * @return String值
-     */
-    @Override
-    public final String readString() {
-        return readString(true);
-    }
-
     @Override
     protected String readString(boolean flag) {
         char ch = nextGoodChar(true);
diff --git a/src/main/java/org/redkale/convert/json/JsonReader.java b/src/main/java/org/redkale/convert/json/JsonReader.java
index ac47a0f20..cb0f9cfee 100644
--- a/src/main/java/org/redkale/convert/json/JsonReader.java
+++ b/src/main/java/org/redkale/convert/json/JsonReader.java
@@ -7,6 +7,7 @@ package org.redkale.convert.json;
 
 import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
+import java.util.Objects;
 import org.redkale.convert.*;
 import static org.redkale.convert.Reader.*;
 import org.redkale.convert.Reader.ValueType;
@@ -32,15 +33,19 @@ public class JsonReader extends Reader {
     public JsonReader() {}
 
     public JsonReader(String json) {
-        setText(Utility.charArray(json));
+        char[] chs = Utility.charArray(json);
+        this.text = chs;
+        this.limit = chs.length - 1;
     }
 
     public JsonReader(char[] text) {
-        setText(text, 0, text.length);
+        this(text, 0, text.length);
     }
 
     public JsonReader(char[] text, int start, int len) {
-        setText(text, start, len);
+        this.text = Objects.requireNonNull(text);
+        this.position = start - 1;
+        this.limit = start + len - 1;
     }
 
     public final JsonReader setText(String text) {
@@ -79,7 +84,7 @@ public class JsonReader extends Reader {
         return true;
     }
 
-    protected CharArray array() {
+    protected final CharArray array() {
         if (array == null) {
             array = new CharArray();
         }
@@ -221,7 +226,7 @@ public class JsonReader extends Reader {
      *
      * @return 是否对象字符
      */
-    public boolean isNextObject() {
+    public final boolean isNextObject() {
         char ch = nextGoodChar(true);
         backChar(ch);
         return ch == '{';
@@ -232,7 +237,7 @@ public class JsonReader extends Reader {
      *
      * @return 是否数组字符
      */
-    public boolean isNextArray() {
+    public final boolean isNextArray() {
         char ch = nextGoodChar(true);
         backChar(ch);
         return ch == '[';
@@ -280,7 +285,9 @@ public class JsonReader extends Reader {
     }
 
     @Override
-    public final void readObjectE(final Class clazz) {}
+    public final void readObjectE(final Class clazz) {
+        // do nothing
+    }
 
     /**
      * 判断下一个非空白字符是否为{
@@ -297,7 +304,9 @@ public class JsonReader extends Reader {
     }
 
     @Override
-    public final void readMapE() {}
+    public final void readMapE() {
+        // do nothing
+    }
 
     /**
      * 判断下一个非空白字符是否为[
@@ -330,7 +339,9 @@ public class JsonReader extends Reader {
     }
 
     @Override
-    public final void readArrayE() {}
+    public final void readArrayE() {
+        // do nothing
+    }
 
     /** 判断下一个非空白字符是否: */
     @Override
@@ -361,7 +372,7 @@ public class JsonReader extends Reader {
      * @return 是否存在
      */
     @Override
-    public boolean hasNext(int startPosition, int contentLength) {
+    public final boolean hasNext(int startPosition, int contentLength) {
         char ch = nextGoodChar(true);
         if (ch == ',') {
             char nt = nextGoodChar(true);
@@ -854,7 +865,7 @@ public class JsonReader extends Reader {
      * @return String值
      */
     @Override
-    public String readString() {
+    public final String readString() {
         return readString(true);
     }