diff --git a/src/main/java/encoding/Block.java b/src/main/java/encoding/Block.java
index 0b796bd..cb92f54 100644
--- a/src/main/java/encoding/Block.java
+++ b/src/main/java/encoding/Block.java
@@ -1,6 +1,6 @@
-package encoding;
+package main.java.encoding;
 
-import util.ByteHelper;
+import main.java.util.ByteHelper;
 
 import java.util.LinkedList;
 import java.util.List;
diff --git a/src/main/java/encoding/SizeT.java b/src/main/java/encoding/SizeT.java
index bb8c276..0d6c599 100644
--- a/src/main/java/encoding/SizeT.java
+++ b/src/main/java/encoding/SizeT.java
@@ -1,4 +1,4 @@
-package encoding;
+package main.java.encoding;
 
 import java.math.BigInteger;
 
diff --git a/src/main/java/encoding/TLV.java b/src/main/java/encoding/TLV.java
index ee22df5..6a87749 100644
--- a/src/main/java/encoding/TLV.java
+++ b/src/main/java/encoding/TLV.java
@@ -1,6 +1,7 @@
-package encoding;
+package main.java.encoding;
 
-import static util.ByteHelper.*;
+
+import main.java.util.ByteHelper;
 
 /*
  * @Author: Wang Feng
@@ -77,24 +78,24 @@ public class TLV {
             return null;
         }
 
-        int firstbyte=uint8ToInt(getFirstByte(buffer,start));
+        int firstbyte=ByteHelper.uint8ToInt(ByteHelper.getFirstByte(buffer,start));
         if(firstbyte<241){
             return new VlInt(firstbyte);
         }else if(firstbyte==241){
             if(length.subtract(start)<3){
                 return null;
             }
-            return new VlInt(getLenBytes(buffer,start,3));
+            return new VlInt(ByteHelper.getLenBytes(buffer,start,3));
         }else if(firstbyte==242){
             if(length.subtract(start)<5){
                 return null;
             }
-            return new VlInt(getLenBytes(buffer,start,5));
+            return new VlInt(ByteHelper.getLenBytes(buffer,start,5));
         }else if(firstbyte==243){
             if(length.subtract(start)<9){
                 return null;
             }
-            return new VlInt(getLenBytes(buffer,start,9));
+            return new VlInt(ByteHelper.getLenBytes(buffer,start,9));
         }else{ //MIN1.0中算越界
             return null;
         }
diff --git a/src/main/java/encoding/VlInt.java b/src/main/java/encoding/VlInt.java
index ff098f7..ea5ab5f 100644
--- a/src/main/java/encoding/VlInt.java
+++ b/src/main/java/encoding/VlInt.java
@@ -1,6 +1,7 @@
-package encoding;
+package main.java.encoding;
 
-import util.ByteHelper;
+
+import main.java.util.ByteHelper;
 
 import java.math.BigInteger;
 
@@ -39,7 +40,7 @@ public class VlInt {
         return SizeOfVarNumber(this.VlIntValue);
     }
     private static int SizeOfVarNumber(BigInteger bigInteger){
-        if(bigInteger.compareTo(BigInteger.valueOf(Long.parseLong("241"))) < 0){
+        if(bigInteger.compareTo(BigInteger.valueOf(241)) < 0){
             return 1;
         }else if(bigInteger.compareTo(BigInteger.valueOf(
                 new Double(pow(2, 16)).longValue())) < 0){
diff --git a/src/main/java/encoding/VlInt_V1.java b/src/main/java/encoding/VlInt_V1.java
index 69e9f97..1d74a4e 100644
--- a/src/main/java/encoding/VlInt_V1.java
+++ b/src/main/java/encoding/VlInt_V1.java
@@ -1,4 +1,4 @@
-package encoding;
+package main.java.encoding;
 
 import static java.lang.Math.pow;
 
diff --git a/src/main/java/util/ByteHelper.java b/src/main/java/util/ByteHelper.java
index 47703a0..fa2856a 100644
--- a/src/main/java/util/ByteHelper.java
+++ b/src/main/java/util/ByteHelper.java
@@ -1,6 +1,7 @@
-package util;
+package main.java.util;
 
-import encoding.VlInt;
+
+import main.java.encoding.VlInt;
 
 /*
  * @Author: Wang Feng