diff --git a/src/main/java/com/sunyard/inf/SydCryptionApi.java b/src/main/java/com/sunyard/inf/SydCryptionApi.java
index 965e4f7..5f45fbb 100644
--- a/src/main/java/com/sunyard/inf/SydCryptionApi.java
+++ b/src/main/java/com/sunyard/inf/SydCryptionApi.java
@@ -3,6 +3,8 @@ package com.sunyard.inf;
 import com.sun.org.apache.xml.internal.security.exceptions.Base64DecodingException;
 import com.sunyard.RetWrap;
 
+import java.io.UnsupportedEncodingException;
+
 /**
  * 对称加解密相关接口
  */
@@ -300,7 +302,7 @@ interface SydSYMApi {
      * @param outFilePath 解密后的数据文件所在的路径
      * @return 解密是否成功。false为失败，true为成功
      */
-    boolean SM4DecryptFileDataCBC(int keyType, String key, int inType, int outType, String inFilePath, String outFilePath);
+    boolean SM4DecryptFileDataCBC(int keyType, String key, int inType, int outType, String inFilePath, String outFilePath) throws UnsupportedEncodingException;
 
     /**
      * 使用SM4算法进行解密，其中加密模式为CBC,
diff --git a/src/main/java/com/sunyard/util/FileUtil.java b/src/main/java/com/sunyard/util/FileUtil.java
index 72ea3a3..4811a87 100644
--- a/src/main/java/com/sunyard/util/FileUtil.java
+++ b/src/main/java/com/sunyard/util/FileUtil.java
@@ -65,9 +65,9 @@ public class FileUtil {
      * @param data 数据
      */
     public static void printDataToFile(String path, String data) {
-        OutputStreamWriter osw = null;
+        BufferedWriter osw = null;
         try {
-            osw = new OutputStreamWriter(new FileOutputStream(path));
+            osw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(path), "UTF-8"));
 
             osw.write(data);
 
diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index 9520ab6..2f5ba6a 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -1608,7 +1608,7 @@ public class SydApi4j implements SydApi {
                         iv = niv;
                         //存储iv
                         retWrap.put("iv", iv);
-                        System.out.println("下一iv长度:" + iv.length);
+//                        System.out.println("下一iv长度:" + iv.length);
                     }
                 }
 
@@ -4318,7 +4318,7 @@ public class SydApi4j implements SydApi {
      */
     // 测试通过
     @Override
-    public boolean SM4DecryptFileDataCBC(int keyType, String key, int inType, int outType, String inFilePath, String outFilePath) {
+    public boolean SM4DecryptFileDataCBC(int keyType, String key, int inType, int outType, String inFilePath, String outFilePath) throws UnsupportedEncodingException {
 
         byte[] msg = FileUtil.getDataFromFile(inFilePath);
 
@@ -4329,7 +4329,7 @@ public class SydApi4j implements SydApi {
         // 调用加密接口将数据加密
         byte[] result = SM4DecryptDataCBC(keyType, key, inType, outType, Util.hexString2Bytes(new String(msg)));
 
-        String str = new String(Util.hexString2Bytes(Util.bytes2HexString(result)));
+        String str = new String(result, "utf-8");
 
         FileUtil.printDataToFile(outFilePath, str);
 
diff --git a/src/test/java/com/sunyard/sydapi/example/ABCNorthBranch.java b/src/test/java/com/sunyard/sydapi/example/ABCNorthBranch.java
index 0da81fc..ed969a9 100644
--- a/src/test/java/com/sunyard/sydapi/example/ABCNorthBranch.java
+++ b/src/test/java/com/sunyard/sydapi/example/ABCNorthBranch.java
@@ -7,6 +7,8 @@ import org.junit.Before;
 import org.junit.Test;
 import racal.sunyard.main.SydApi4j;
 
+import java.io.UnsupportedEncodingException;
+
 import static com.sunyard.sydapi.util.PrintUtil.printByteArray;
 import static com.sunyard.sydapi.util.PrintUtil.printRetWrap;
 
@@ -146,7 +148,7 @@ public class ABCNorthBranch {
     // 测试通过
     // E0
     @Test
-    public void testSM4DecryptFileDataCBC() {
+    public void testSM4DecryptFileDataCBC() throws UnsupportedEncodingException {
 
         String outFilePath = "C:\\Users\\edgar\\Desktop\\fsdownload\\test\\in2.txt";
         String outFilePath2 = "C:\\Users\\edgar\\Desktop\\fsdownload\\test\\out1.txt";
diff --git a/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java b/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java
index fd98fea..56d08c1 100644
--- a/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java
+++ b/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java
@@ -663,7 +663,7 @@ public class TestAllMethods {
     // 测试通过
     // E0
     @Test
-    public void testSM4DecryptFileDataCBC() {
+    public void testSM4DecryptFileDataCBC() throws UnsupportedEncodingException {
         String key = "X6CEE744329499B426CEE744329499B42";
         String outFilePath = "C:\\Users\\edgar\\Desktop\\fsdownload\\test\\in2.txt";
         String outFilePath2 = "C:\\Users\\edgar\\Desktop\\fsdownload\\test\\out1.txt";
@@ -671,6 +671,19 @@ public class TestAllMethods {
         System.out.println(b);
     }
 
+    @Test
+    public void testaaa() throws UnsupportedEncodingException {
+        String key = "X6CEE744329499B426CEE744329499B42";
+        String inFilePath = "C:\\Users\\edgar\\Desktop\\fsdownload\\test\\in1.txt";
+        String outFilePath = "C:\\Users\\edgar\\Desktop\\fsdownload\\test\\in2.txt";
+        String outFilePath2 = "C:\\Users\\edgar\\Desktop\\fsdownload\\test\\out1.txt";
+
+        boolean b = api.SM4EncryptFileDataCBC(0, key, 0, 0, inFilePath, outFilePath);
+        System.out.println(b);
+        boolean c = api.SM4DecryptFileDataCBC(0, key, 0, 0, outFilePath, outFilePath2);
+        System.out.println(c);
+    }
+
     // 测试通过
     // Y0
     @Test