diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index 3a66a14..5cd7f72 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -51,6 +51,7 @@ import java.net.Socket;
 import java.net.SocketAddress;
 import java.net.SocketTimeoutException;
 import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 import java.nio.charset.Charset;
 import java.security.NoSuchProviderException;
 import java.security.Security;
@@ -6923,18 +6924,18 @@ public class SydApi4j implements SydApi {
         bb.put("7F".getBytes());
         bb.put((byte) dataType); // 数据包标志
         if ( 2 == dataType ) { // 公钥
-            bb.put(ByteUtil.shortToBytes((short) publicKey.length));
+            bb.put(ByteUtil.shortToBytes((short) publicKey.length, ByteOrder.BIG_ENDIAN) );
             bb.put(publicKey);
         }
         if ( 1 == dataType ) { // 数据
-            bb.put(ByteUtil.shortToBytes((short) pOrgData.limit()));
+            bb.put(ByteUtil.shortToBytes((short) pOrgData.limit(), ByteOrder.BIG_ENDIAN));
             bb.put(pOrgData);
             bb.put(ByteUtil.intToBytes(idx));
         }
 
         if ( 3 == dataType) { // 仅数据长度
-            bb.put( ByteUtil.shortToBytes((short) (63*1024)) );
-            bb.put( ByteUtil.intToBytes(idx));
+            bb.put( ByteUtil.shortToBytes((short) (63*1024), ByteOrder.BIG_ENDIAN) );
+            bb.put( ByteUtil.intToBytes(idx, ByteOrder.BIG_ENDIAN));
         }
 
 
@@ -6965,7 +6966,7 @@ public class SydApi4j implements SydApi {
             int isLast = bb.get();
             byte[] dataLenArr = new byte[2];
             bb.get(dataLenArr);
-            int dataLen = ByteUtil.bytesToInt(dataLenArr);
+            int dataLen = ByteUtil.bytesToInt(dataLenArr, ByteOrder.BIG_ENDIAN);
 //            byte[] data = new byte[dataLen];
 //            bb.get(data);
             ByteBuffer slice = ByteBufferUtil.sliceAndConsume(bb, dataLen);
@@ -7058,17 +7059,17 @@ public class SydApi4j implements SydApi {
         bb.put((byte) dataType);
 
         if (dataType == 2) {                 // 私钥
-            bb.put(ByteUtil.shortToBytes((short) privateKey.length));
+            bb.put(ByteUtil.shortToBytes((short) privateKey.length, ByteOrder.BIG_ENDIAN));
             bb.put(privateKey);
         }
         if (dataType == 1) {                 // 密文块
-            bb.put(ByteUtil.shortToBytes((short) pCipherData.limit()));
+            bb.put(ByteUtil.shortToBytes((short) pCipherData.limit(), ByteOrder.BIG_ENDIAN));
             bb.put(pCipherData);
-            bb.put(ByteUtil.intToBytes(idx));
+            bb.put(ByteUtil.intToBytes(idx, ByteOrder.BIG_ENDIAN));
         }
         if (dataType == 3) {                 // 请求明文块
-            bb.put(ByteUtil.shortToBytes((short) (63 * 1024)));
-            bb.put(ByteUtil.intToBytes(idx));
+            bb.put(ByteUtil.shortToBytes((short) (63 * 1024), ByteOrder.BIG_ENDIAN));
+            bb.put(ByteUtil.intToBytes(idx, ByteOrder.BIG_ENDIAN));
         }
 
         // 填写总长度（长度字段本身不包含在内）
@@ -7095,7 +7096,7 @@ public class SydApi4j implements SydApi {
             int isLast = bb.get();
             byte[] dataLenArr = new byte[2];
             bb.get(dataLenArr);
-            int dataLen = ByteUtil.bytesToInt(dataLenArr);
+            int dataLen = ByteUtil.bytesToInt(dataLenArr, ByteOrder.BIG_ENDIAN);
             ByteBuffer slice = ByteBufferUtil.sliceAndConsume(bb, dataLen);
             return new MutiReturn7(retCode, isLast, slice);
         } else {