diff --git a/jsowell-common/src/main/java/com/jsowell/common/util/StringUtils.java b/jsowell-common/src/main/java/com/jsowell/common/util/StringUtils.java
index f6519e33c..8466d0acc 100644
--- a/jsowell-common/src/main/java/com/jsowell/common/util/StringUtils.java
+++ b/jsowell-common/src/main/java/com/jsowell/common/util/StringUtils.java
@@ -504,7 +504,7 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
         if (hex.length() == 1) {
             hex = '0' + hex;
         }
-        return "0x" + hex.toUpperCase();
+        return Constants.HEX_PREFIX + hex.toUpperCase();
     }
 
     /**
@@ -548,9 +548,9 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
      * @return byte
      */
     public static byte uniteBytes(byte src0, byte src1) {
-        byte _b0 = Byte.decode("0x" + new String(new byte[]{src0}));
+        byte _b0 = Byte.decode(Constants.HEX_PREFIX + new String(new byte[]{src0}));
         _b0 = (byte) (_b0 << 4);
-        byte _b1 = Byte.decode("0x" + new String(new byte[]{src1}));
+        byte _b1 = Byte.decode(Constants.HEX_PREFIX + new String(new byte[]{src1}));
         byte ret = (byte) (_b0 ^ _b1);
         return ret;
     }
diff --git a/jsowell-common/src/main/java/com/jsowell/common/util/id/UUID.java b/jsowell-common/src/main/java/com/jsowell/common/util/id/UUID.java
index af53381b2..9add29c45 100644
--- a/jsowell-common/src/main/java/com/jsowell/common/util/id/UUID.java
+++ b/jsowell-common/src/main/java/com/jsowell/common/util/id/UUID.java
@@ -1,5 +1,6 @@
 package com.jsowell.common.util.id;
 
+import com.jsowell.common.constant.Constants;
 import com.jsowell.common.exception.UtilException;
 
 import java.security.MessageDigest;
@@ -133,7 +134,7 @@ public final class UUID implements java.io.Serializable, Comparable<UUID> {
 			throw new IllegalArgumentException("Invalid UUID string: " + name);
 		}
 		for (int i = 0; i < 5; i++) {
-			components[i] = "0x" + components[i];
+			components[i] = Constants.HEX_PREFIX + components[i];
 		}
 
 		long mostSigBits = Long.decode(components[0]).longValue();