diff --git a/src/org/redkale/convert/Factory.java b/src/org/redkale/convert/Factory.java
index 7987968b3..b38231a9a 100644
--- a/src/org/redkale/convert/Factory.java
+++ b/src/org/redkale/convert/Factory.java
@@ -19,7 +19,7 @@ import org.redkale.convert.ext.*;
 import org.redkale.util.*;
 
 /**
- * 
+ *
  * @see http://www.redkale.org
  * @author zhangjx
  * @param <R>
@@ -82,6 +82,7 @@ public abstract class Factory<R extends Reader, W extends Writer> {
 
             this.register(Number.class, NumberSimpledCoder.instance);
             this.register(String.class, StringSimpledCoder.instance);
+            this.register(CharSequence.class, CharSequenceSimpledCoder.instance);
             this.register(java.util.Date.class, DateSimpledCoder.instance);
             this.register(BigInteger.class, BigIntegerSimpledCoder.instance);
             this.register(InetAddress.class, InetAddressSimpledCoder.instance);
diff --git a/src/org/redkale/convert/ext/CharSequenceSimpledCoder.java b/src/org/redkale/convert/ext/CharSequenceSimpledCoder.java
new file mode 100644
index 000000000..7d7796e87
--- /dev/null
+++ b/src/org/redkale/convert/ext/CharSequenceSimpledCoder.java
@@ -0,0 +1,29 @@
+/*
+ * 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.ext;
+
+import org.redkale.convert.*;
+
+/**
+ *
+ * @author zhangjx
+ * @param <R>
+ * @param <W>
+ */
+public class CharSequenceSimpledCoder<R extends Reader, W extends Writer> extends SimpledCoder<R, W, CharSequence> {
+
+    public static final CharSequenceSimpledCoder instance = new CharSequenceSimpledCoder();
+
+    @Override
+    public void convertTo(W out, CharSequence value) {
+        out.writeString(value == null ? null : value.toString());
+    }
+
+    @Override
+    public CharSequence convertFrom(R in) {
+        return in.readString();
+    }
+}
diff --git a/src/org/redkale/service/RetResult.java b/src/org/redkale/service/RetResult.java
index 9b6678064..1361644fb 100644
--- a/src/org/redkale/service/RetResult.java
+++ b/src/org/redkale/service/RetResult.java
@@ -26,7 +26,7 @@ public class RetResult<T> {
         }
 
         @Override
-        public void setRetinfo(String retinfo) {
+        public void setRetinfo(CharSequence retinfo) {
         }
 
         @Override
@@ -38,7 +38,7 @@ public class RetResult<T> {
 
     protected int retcode;
 
-    protected String retinfo;
+    protected CharSequence retinfo;
 
     private T result;
 
@@ -86,11 +86,11 @@ public class RetResult<T> {
         this.retcode = retcode;
     }
 
-    public String getRetinfo() {
+    public CharSequence getRetinfo() {
         return retinfo;
     }
 
-    public void setRetinfo(String retinfo) {
+    public void setRetinfo(CharSequence retinfo) {
         this.retinfo = retinfo;
     }