修复bytehelper & VlInt中的已知bug

src/main/java/encoding/TLV.java

@@ -2,6 +2,7 @@ package encoding;
 
 
 import util.ByteHelper;
+import util.ByteHelperException;
 
 /*
  * @Author: Wang Feng
@@ -72,13 +73,15 @@ public class TLV {
      * @param start
      * @return
      */
-    public static VlInt readVarNumber(byte[] buffer,VlInt start){
+    public static VlInt readVarNumber(byte[] buffer,VlInt start) throws ByteHelperException {
         VlInt length=new VlInt(buffer.length);
         if(start.compareTo(length)>=0){
             return null;
         }
 
-        int firstbyte=ByteHelper.uint8ToInt(ByteHelper.getFirstByte(buffer,start));
+        int firstbyte= 0;
+        firstbyte = ByteHelper.uint8ToInt(ByteHelper.getFirstByte(buffer,start));
+
         if(firstbyte<241){
             return new VlInt(firstbyte);
         }else if(firstbyte==241){
@@ -108,7 +111,12 @@ public class TLV {
      * @return
      */
     public static VlInt readType(byte[] buffer,VlInt start){
-        VlInt tlvType=readVarNumber(buffer,start);
+        VlInt tlvType= null;
+        try {
+            tlvType = readVarNumber(buffer,start);
+        } catch (ByteHelperException e) {
+            e.printStackTrace();
+        }
 
         if(tlvType==null||tlvType.isEqual(0)||tlvType.compareTo(MaxTlvNum)>0){
             return null;