diff --git a/src/org/redkale/convert/Convert.java b/src/org/redkale/convert/Convert.java
index 61bb20cd0..a81d43010 100644
--- a/src/org/redkale/convert/Convert.java
+++ b/src/org/redkale/convert/Convert.java
@@ -50,8 +50,6 @@ public abstract class Convert<R extends Reader, W extends Writer> {
 
     public abstract <T> T convertFrom(final Type type, final byte[] bytes);
 
-    public abstract <T> T convertFrom(final Type type, final ConvertMask mask, final byte[] bytes);
-
     public abstract <T> T convertFrom(final Type type, final ByteBuffer... buffers);
 
     public abstract <T> T convertFrom(final Type type, final ConvertMask mask, final ByteBuffer... buffers);
diff --git a/src/org/redkale/convert/bson/BsonConvert.java b/src/org/redkale/convert/bson/BsonConvert.java
index b95fd55ce..7d51de6c7 100644
--- a/src/org/redkale/convert/bson/BsonConvert.java
+++ b/src/org/redkale/convert/bson/BsonConvert.java
@@ -115,16 +115,6 @@ public class BsonConvert extends BinaryConvert<BsonReader, BsonWriter> {
         return convertFrom(type, bytes, 0, bytes.length);
     }
 
-    @Override
-    public <T> T convertFrom(final Type type, final ConvertMask mask, final byte[] bytes) {
-        if (type == null) return null;
-        final BsonMaskReader in = new BsonMaskReader(mask);
-        in.setBytes(bytes, 0, bytes.length);
-        @SuppressWarnings("unchecked")
-        T rs = (T) factory.loadDecoder(type).convertFrom(in);
-        return rs;
-    }
-
     @SuppressWarnings("unchecked")
     public <T> T convertFrom(final Type type, final byte[] bytes, final int start, final int len) {
         if (type == null) return null;
diff --git a/src/org/redkale/convert/bson/BsonMaskReader.java b/src/org/redkale/convert/bson/BsonMaskReader.java
deleted file mode 100644
index c66a21eaf..000000000
--- a/src/org/redkale/convert/bson/BsonMaskReader.java
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
-package org.redkale.convert.bson;
-
-import java.util.Objects;
-import org.redkale.convert.*;
-import static org.redkale.convert.Reader.SIGN_NULL;
-import org.redkale.convert.ext.ByteSimpledCoder;
-import org.redkale.util.Utility;
-
-/**
- * BSON数据源
- *
- * <p>
- * 详情见: https://redkale.org
- *
- * @author zhangjx
- */
-public class BsonMaskReader extends BsonReader {
-
-    protected ConvertMask mask;
-
-    public BsonMaskReader(ConvertMask mask) {
-        Objects.requireNonNull(mask);
-        this.mask = mask;
-    }
-
-    public void setMask(ConvertMask mask) {
-        this.mask = mask;
-    }
-
-    @Override
-    protected boolean recycle() {
-        boolean rs = super.recycle();
-        this.mask = null;
-        return rs;
-    }
-
-    @Override
-    protected byte currentByte() {
-        return mask.unmask(content[this.position]);
-    }
-
-    @Override
-    public int readMapB(DeMember member, byte[] typevals, Decodeable keyDecoder, Decodeable valueDecoder) {
-        short bt = readShort();
-        if (bt == Reader.SIGN_NULL) return bt;
-        int rs = (bt & 0xffff) << 16 | ((mask.unmask(content[++this.position]) & 0xff) << 8) | (mask.unmask(content[++this.position]) & 0xff);
-        byte kt = readByte();
-        byte vt = readByte();
-        if (typevals != null) {
-            typevals[0] = kt;
-            typevals[1] = vt;
-        }
-        return rs;
-    }
-
-    @Override
-    public int readArrayB(DeMember member, byte[] typevals, Decodeable componentDecoder) { //componentDecoder可能为null
-        short bt = readShort();
-        if (bt == Reader.SIGN_NULL) return bt;
-        int rs = (bt & 0xffff) << 16 | ((mask.unmask(content[++this.position]) & 0xff) << 8) | (mask.unmask(content[++this.position]) & 0xff);
-        if (componentDecoder != null && componentDecoder != ByteSimpledCoder.instance) {
-            byte comval = readByte();
-            if (typevals != null) typevals[0] = comval;
-        }
-        return rs;
-    }
-
-    @Override
-    public boolean readBoolean() {
-        return mask.unmask(content[++this.position]) == 1;
-    }
-
-    @Override
-    public byte readByte() {
-        return mask.unmask(content[++this.position]);
-    }
-
-    @Override
-    public char readChar() {
-        return (char) ((0xff00 & (mask.unmask(content[++this.position]) << 8)) | (0xff & mask.unmask(content[++this.position])));
-    }
-
-    @Override
-    public short readShort() {
-        return (short) ((0xff00 & (mask.unmask(content[++this.position]) << 8)) | (0xff & mask.unmask(content[++this.position])));
-    }
-
-    @Override
-    public int readInt() {
-        return ((mask.unmask(content[++this.position]) & 0xff) << 24) | ((mask.unmask(content[++this.position]) & 0xff) << 16)
-            | ((mask.unmask(content[++this.position]) & 0xff) << 8) | (mask.unmask(content[++this.position]) & 0xff);
-    }
-
-    @Override
-    public long readLong() {
-        return ((((long) mask.unmask(content[++this.position]) & 0xff) << 56)
-            | (((long) mask.unmask(content[++this.position]) & 0xff) << 48)
-            | (((long) mask.unmask(content[++this.position]) & 0xff) << 40)
-            | (((long) mask.unmask(content[++this.position]) & 0xff) << 32)
-            | (((long) mask.unmask(content[++this.position]) & 0xff) << 24)
-            | (((long) mask.unmask(content[++this.position]) & 0xff) << 16)
-            | (((long) mask.unmask(content[++this.position]) & 0xff) << 8)
-            | (((long) mask.unmask(content[++this.position]) & 0xff)));
-    }
-
-    @Override
-    public String readSmallString() {
-        int len = 0xff & readByte();
-        if (len == 0) return "";
-        byte[] bs = new byte[len];
-        for (int i = 0; i < bs.length; i++) {
-            bs[i] = mask.unmask(content[++this.position]);
-        }
-        String value = new String(bs);
-        this.position += len - 1; //上一行已经++this.position，所以此处要-1
-        return value;
-    }
-
-    @Override
-    public String readString() {
-        int len = readInt();
-        if (len == SIGN_NULL) return null;
-        if (len == 0) return "";
-        byte[] bs = new byte[len];
-        for (int i = 0; i < bs.length; i++) {
-            bs[i] = mask.unmask(content[++this.position]);
-        }
-        String value = new String(Utility.decodeUTF8(bs, 0, len));
-        this.position += len - 1;//上一行已经++this.position，所以此处要-1
-        return value;
-    }
-}
diff --git a/src/org/redkale/convert/bson/BsonReader.java b/src/org/redkale/convert/bson/BsonReader.java
index d1201ae07..651e0cfdc 100644
--- a/src/org/redkale/convert/bson/BsonReader.java
+++ b/src/org/redkale/convert/bson/BsonReader.java
@@ -36,7 +36,7 @@ public class BsonReader extends Reader {
 
     protected int position = -1;
 
-    protected byte[] content;
+    private byte[] content;
 
     public BsonReader() {
     }
diff --git a/src/org/redkale/convert/json/JsonConvert.java b/src/org/redkale/convert/json/JsonConvert.java
index 9c9837d52..0c922ee1e 100644
--- a/src/org/redkale/convert/json/JsonConvert.java
+++ b/src/org/redkale/convert/json/JsonConvert.java
@@ -106,16 +106,6 @@ public class JsonConvert extends TextConvert<JsonReader, JsonWriter> {
         return convertFrom(type, new String(bytes, StandardCharsets.UTF_8));
     }
 
-    @Override
-    public <T> T convertFrom(final Type type, final ConvertMask mask, final byte[] bytes) {
-        if (mask == null) return convertFrom(type, bytes);
-        byte[] bs = new byte[bytes.length];
-        for (int i = 0; i < bytes.length; i++) {
-            bs[i] = mask.unmask(bytes[i]);
-        }
-        return convertFrom(type, new String(bs, StandardCharsets.UTF_8));
-    }
-
     public <T> T convertFrom(final Type type, final String text) {
         if (text == null) return null;
         return convertFrom(type, Utility.charArray(text));