diff --git a/src/test/java/test/LengthTest.java b/src/test/java/test/LengthTest.java
index db0cc6f..e53c614 100644
--- a/src/test/java/test/LengthTest.java
+++ b/src/test/java/test/LengthTest.java
@@ -32,11 +32,14 @@ public class LengthTest
     //
     @Test
     public void syd_SM4_ShortDataTest(){
+        int keyIdx = 0;
+        byte[] data = new byte[16];
         //解密 pcData长度为0
         byte[] bytes = api.SYD_SM4_ShortData(0, new byte[0], Consts.ECB_DEC);
         Arrays.toString(bytes);
         //解密 pcData长度不为0
-        byte[] bytes2 = api.SYD_SM4_ShortData(0, new byte[16], Consts.ECB_DEC);
+        byte[] encData = api.SYD_SM4_ShortData( keyIdx , data, Consts.ECB_ENC );
+        byte[] bytes2 = api.SYD_SM4_ShortData(keyIdx, encData, Consts.ECB_DEC);
         Arrays.toString(bytes2);
     }
     @Test
@@ -61,7 +64,7 @@ public class LengthTest
         List<byte[]> encData = api.SYD_SM4_BatchData( keyIdx , data2, Consts.ECB_ENC );
         List<byte[]> orgDatas2 = api.SYD_SM4_BatchData( keyIdx , encData, Consts.ECB_DEC );
         for (byte[] byte_2 :orgDatas2) {
-            System.out.printf("解密后数据", Arrays.toString(byte_2));
+            System.out.println(Arrays.toString(byte_2));
         }
     }
     @Test