diff --git a/ktx/build.gradle b/ktx/build.gradle
index 83a3034..7e93576 100644
--- a/ktx/build.gradle
+++ b/ktx/build.gradle
@@ -103,7 +103,7 @@ publish {
     userOrg = 'luyaox'           //bintray.com 注册的用户名
     groupId = 'luyao.util.ktx'   //以后访问 jcenter上此项目的路径，一般和库项目的包名一致
     artifactId = 'AndroidUtilKTX'       //bintray.com 创建的 Package 名
-    publishVersion = '0.0.7-alpha01'         //版本号
+    publishVersion = '0.0.7-alpha02'         //版本号
     desc = 'Android Kotlin Util Code' //版本说明，随意
     website = 'https://github.com/lulululbj/AndroidUtilCodeKTX'    //关于这个开源项目的网站，随意
 }
\ No newline at end of file
diff --git a/ktx/resources/enc b/ktx/resources/enc
index 7df9a08..334cb80 100644
Binary files a/ktx/resources/enc and b/ktx/resources/enc differ
diff --git a/ktx/src/main/java/luyao/util/ktx/ext/TransformExt.kt b/ktx/src/main/java/luyao/util/ktx/ext/TransformExt.kt
index cf86a86..da4518a 100644
--- a/ktx/src/main/java/luyao/util/ktx/ext/TransformExt.kt
+++ b/ktx/src/main/java/luyao/util/ktx/ext/TransformExt.kt
@@ -8,6 +8,7 @@ import android.graphics.PixelFormat
 import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
 import java.io.ByteArrayOutputStream
+import java.util.*
 
 
 /**
@@ -31,6 +32,34 @@ fun ByteArray.toHexString(): String {
     return String(result)
 }
 
+/**
+ * hex string to byte array
+ */
+fun String.hexToByteArray(): ByteArray {
+    var len = length
+    var hexString = this
+    if (len % 2 != 0) {
+        hexString = "0$hexString"
+        len++
+    }
+    val hexBytes = hexString.toUpperCase(Locale.getDefault()).toCharArray()
+    val ret = ByteArray(len shr 1)
+    var i = 0
+    while (i < len) {
+        ret[i shr 1] = ((hexBytes[i].hexToInt()) shl 4 or (hexBytes[i + 1].hexToInt())).toByte()
+        i += 2
+    }
+    return ret
+}
+
+fun Char.hexToInt(): Int {
+    return when (this) {
+        in '0'..'9' -> this - '0'
+        in 'A'..'F' -> this - 'A' + 10
+        else -> throw IllegalArgumentException()
+    }
+}
+
 /**
  * byte array to int
  */
diff --git a/ktx/src/test/java/luyao/util/ktx/ext/AesExtKtTest.kt b/ktx/src/test/java/luyao/util/ktx/ext/AesExtKtTest.kt
index cfe8f03..d3a2e4a 100644
--- a/ktx/src/test/java/luyao/util/ktx/ext/AesExtKtTest.kt
+++ b/ktx/src/test/java/luyao/util/ktx/ext/AesExtKtTest.kt
@@ -11,7 +11,7 @@ import java.io.File
  */
 class AesExtKtTest {
 
-    private val plainText = "luyao"
+    private val plainText = "路遥.zip"
     var key: ByteArray = ByteArray(128)
     var iv: ByteArray = ByteArray(128)
 
diff --git a/ktx/src/test/java/luyao/util/ktx/ext/TransformExtKtTest.kt b/ktx/src/test/java/luyao/util/ktx/ext/TransformExtKtTest.kt
index e391f88..8aec59a 100644
--- a/ktx/src/test/java/luyao/util/ktx/ext/TransformExtKtTest.kt
+++ b/ktx/src/test/java/luyao/util/ktx/ext/TransformExtKtTest.kt
@@ -10,15 +10,17 @@ import org.junit.Assert.*
  */
 class TransformExtKtTest {
 
-    val integer = 207689539
-    val intBytes = byteArrayOf(12,97,23,67)
 
-    val short : Short = 32767
-    val shortBytes = byteArrayOf(-1,127)
+    private val text = "路遥.txt"
+    private val integer = 207689539
+    private val intBytes = byteArrayOf(12,97,23,67)
+
+    private val short : Short = 32767
+    private val shortBytes = byteArrayOf(-1,127)
 
 
-     val long = 2223372036854775807L
-     val longBytes = byteArrayOf(-1, -1, 67, 108, 22, 1, -37, 30)
+     private val long = 2223372036854775807L
+     private val longBytes = byteArrayOf(-1, -1, 67, 108, 22, 1, -37, 30)
 
     @Test
     fun test() {
@@ -43,4 +45,15 @@ class TransformExtKtTest {
         assertEquals(long,bytesToLong)
     }
 
+    @Test
+    fun toHexString() {
+        val hexString = text.toByteArray().toHexString()
+        val originString = hexString.hexToByteArray()
+
+        assertEquals(text,String(originString))
+    }
+
+
+
+
 }
\ No newline at end of file