diff --git a/src/main/java/com/sunyard/sge/database/SydApiSM4.java b/src/main/java/com/sunyard/sge/database/SydApiSM4.java
index c5bfca1..cf06759 100644
--- a/src/main/java/com/sunyard/sge/database/SydApiSM4.java
+++ b/src/main/java/com/sunyard/sge/database/SydApiSM4.java
@@ -12,7 +12,7 @@ public class SydApiSM4 {
     private int iPkgNum = 1;
     private int iFlag;
     private boolean is_finished = false;
-    private ByteBuffer sourceWrap = ByteBuffer.wrap(new byte[0]);
+    ByteBuffer sourceWrap = ByteBuffer.wrap(new byte[0]);
 
 
     public SydApiSM4(SydApi api, int iKeyIndex, int endeFlag) {
@@ -21,87 +21,77 @@ public class SydApiSM4 {
         this.iKeyIndex = iKeyIndex;
     }
 
-    public byte[] update(byte[] pcData) {
-        try {
-            this.pcdataResult = pcData;
-            if (null == pcData || pcData.length == 0) {
-                return new byte[0];
-            }
-            int plength = pcData.length;
-            if (is_finished) {
-                throw new SydApiException(0);
-            }
-            if (plength > 4064) {
-                throw new SydApiException(0);
-            }
-            if (0 == sourceWrap.array().length) {
-                //加密
-                if (plength < 16) {
-                    api.SYD_SM4_LongData(iKeyIndex, new byte[0], iPkgNum, iFlag);
-                    if (iFlag == 0 && 1 == iPkgNum) {
-                        throw new SydApiException("解密的首包不能小于 16 字节", 0);
-                    }
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    sourceWrap = bufferResult;
-                }
-                if (plength % 16 != 0) {
-                    ByteBuffer buffer = ByteBuffer.wrap(pcData);
-                    int remainder = plength % 16;
-                    int intercept = plength - remainder;
-                    byte[] bytes = new byte[intercept];
-                    ByteBuffer byteBuffer = buffer.get(bytes, 0, intercept);
-                    byte[] bytes1 = new byte[remainder];
-                    byteBuffer.get(bytes1);
-                    this.pcdataResult = bytes;
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + remainder);
-                    bufferResult.put(bytes1);
-                    sourceWrap = bufferResult;
-                }
-                iPkgNum = 2;
-                return api.SYD_SM4_LongData(iKeyIndex, pcdataResult, iPkgNum, iFlag);
-
-            } else {
-                if (16 > pcData.length + sourceWrap.array().length) {
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    sourceWrap = bufferResult;
-                } else if ((pcData.length + sourceWrap.array().length) % 16 == 0) {
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
-                    return api.SYD_SM4_LongData(iKeyIndex, bytes, iPkgNum, iFlag);
-                } else {
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
-                    ByteBuffer buffer = ByteBuffer.wrap(bytes);
-                    int remainder = bytes.length % 16;
-                    int intercept = bytes.length - remainder;
-                    byte[] pcdataByte = new byte[intercept];
-                    ByteBuffer byteBuffer = buffer.get(pcdataByte, 0, intercept);
-                    byte[] bytes1 = new byte[remainder];
-                    byteBuffer.get(bytes1);
-                    this.pcdataResult = pcdataByte;
-                    ByteBuffer bufferResults = ByteBuffer.allocate(remainder);
-                    bufferResults.put(bytes1);
-                    sourceWrap = bufferResults;
-                    iPkgNum = 2;
-                    return api.SYD_SM4_LongData(iKeyIndex, pcdataResult, iPkgNum, iFlag);
-
-                }
-            }
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw e;
+    public void update(byte[] pcData) {
+        this.pcdataResult = pcData;
+        if (null == pcData || pcData.length == 0) {
+            return;
+        }
+        int plength = pcData.length;
+        if (is_finished) {
+            throw new SydApiException(0);
+        }
+        if (plength > 4064) {
+            throw new SydApiException(0);
+        }
+        if (0 == sourceWrap.array().length) {
+            //加密
+            if (plength < 16) {
+                api.SYD_SM4_LongData(iKeyIndex, new byte[0], iPkgNum, iFlag);
+                if (iFlag == 0 && 1 == iPkgNum) {
+                    throw new SydApiException("解密的首包不能小于 16 字节", 0);
+                }
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
+                bufferResult.put(sourceWrap);
+                bufferResult.put(pcData);
+                sourceWrap = bufferResult;
+            }
+            if (plength % 16 != 0) {
+                ByteBuffer buffer = ByteBuffer.wrap(pcData);
+                int remainder = plength % 16;
+                int intercept = plength - remainder;
+                byte[] bytes = new byte[intercept];
+                ByteBuffer byteBuffer = buffer.get(bytes, 0, intercept);
+                byte[] bytes1 = new byte[remainder];
+                byteBuffer.get(bytes1);
+                this.pcdataResult = bytes;
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + remainder);
+                bufferResult.put(bytes1);
+                sourceWrap = bufferResult;
+            }
+            byte[] bytes = api.SYD_SM4_LongData(iKeyIndex, pcdataResult, iPkgNum, iFlag);
+            iPkgNum = 2;
+        } else {
+            if (16 > pcData.length + sourceWrap.array().length) {
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
+                bufferResult.put(sourceWrap);
+                bufferResult.put(pcData);
+                sourceWrap = bufferResult;
+            } else if ((pcData.length + sourceWrap.array().length) % 16 == 0) {
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
+                bufferResult.put(SydSM4Mac.bytebuffer2ByteArray(sourceWrap));
+                bufferResult.put(pcData);
+                byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
+                api.SYD_SM4_LongData(iKeyIndex, bytes, iPkgNum, iFlag);
+            } else {
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + plength);
+                bufferResult.put(SydSM4Mac.bytebuffer2ByteArray(sourceWrap));
+                bufferResult.put(pcData);
+                byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
+                ByteBuffer buffer = ByteBuffer.wrap(bytes);
+                int remainder = bytes.length % 16;
+                int intercept = bytes.length - remainder;
+                byte[] pcdataByte = new byte[intercept];
+                ByteBuffer byteBuffer = buffer.get(pcdataByte, 0, intercept);
+                byte[] bytes1 = new byte[remainder];
+                byteBuffer.get(bytes1);
+                this.pcdataResult = pcdataByte;
+                ByteBuffer bufferResults = ByteBuffer.allocate(remainder);
+                bufferResults.put(bytes1);
+                sourceWrap = bufferResults;
+                api.SYD_SM4_LongData(iKeyIndex, pcdataResult, iPkgNum, iFlag);
+                iPkgNum = 2;
+            }
         }
-
-        return null;
-
     }
 
     public byte[] finish() {
diff --git a/src/main/java/com/sunyard/sge/database/SydSM4Mac.java b/src/main/java/com/sunyard/sge/database/SydSM4Mac.java
index 9dbc80b..06fc0a1 100644
--- a/src/main/java/com/sunyard/sge/database/SydSM4Mac.java
+++ b/src/main/java/com/sunyard/sge/database/SydSM4Mac.java
@@ -3,22 +3,25 @@ package com.sunyard.sge.database;
 import com.sunyard.SydApiException;
 
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
 
 public class SydSM4Mac {
     private SydApi api;
+    private byte[] last_in_data;
     private int iKeyIndex;
     private int iPkgNum = 1;
-    private boolean isFinished;
-
-    // 中间数据
     private String pcProcData;
-
-
-    private ByteBuffer sourceWrap = ByteBuffer.wrap(new byte[0]);
+    private boolean is_finished;
+    private String pcMac;
+    private byte[] pcdataResult = new byte[0];
+    ByteBuffer sourceWrap = ByteBuffer.wrap(new byte[0]);
 
     public SydSM4Mac(SydApi api, int iKeyIndex) {
         this.api = api;
         this.iKeyIndex = iKeyIndex;
+        this.pcProcData = pcProcData;
+        this.pcMac=pcMac;
     }
 
     public SydSM4Mac(SydApi api) {
@@ -26,47 +29,94 @@ public class SydSM4Mac {
     }
 
     public SydSM4Mac update(byte[] pcData) {
+        if (null == pcData || 0 == pcData.length) {
+            return this;
+        }
+        int length = pcData.length;
+        this.pcdataResult = pcData;
+        if (is_finished) {
+            throw new SydApiException(0);
+        }
+        if (length > 4064) {
+            throw new SydApiException(0);
+        }
+        if (0 == sourceWrap.array().length) {
+            if (length < 16) {
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + length);
+                bufferResult.put(sourceWrap);
+                bufferResult.put(pcData);
+                sourceWrap = bufferResult;
+                if (null == this.pcMac || "".equals(this.pcMac)) {
+                    LongDataReturn<String, String> stringStringLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, 0, pcProcData);
+                    pcProcData = stringStringLongDataReturn.getProcData();
+                } else {
+                    LongDataReturn<String, Boolean> stringBooleanLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, 0, pcProcData, pcMac);
+                    pcProcData = stringBooleanLongDataReturn.getProcData();
+                    return this;
+                }
+            }
+            if (length % 16 != 0) {
+                ByteBuffer buffer = ByteBuffer.wrap(pcData);
+                int remainder = length % 16;
+                int intercept = length - remainder;
+                byte[] bytes = new byte[intercept];
+                ByteBuffer byteBuffer = buffer.get(bytes, 0, intercept);
+                byte[] bytes1 = new byte[remainder];
+                byteBuffer.get(bytes1);
+                this.pcdataResult = bytes;
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + remainder);
+                bufferResult.put(bytes1);
+                sourceWrap = bufferResult;
+            }
+            if (null == this.pcMac || "".equals(this.pcMac)) {
+                LongDataReturn<String, String> stringStringLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, iPkgNum, pcProcData);
+                pcProcData = stringStringLongDataReturn.getProcData();
+                iPkgNum = 2;
+            } else {
+                LongDataReturn<String, Boolean> stringBooleanLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, iPkgNum, pcProcData, pcMac);
+                pcProcData = stringBooleanLongDataReturn.getProcData();
+                iPkgNum = 2;
+            }
+        } else {
+            if (16 > (pcData.length + sourceWrap.array().length)) {
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + pcData.length);
+                bufferResult.put(sourceWrap);
+                bufferResult.put(pcData);
+                sourceWrap = bufferResult;
+            }
 
-        try {
-            if (null == pcData || 0 == pcData.length) {
-                return this;
-            }
-            int length = pcData.length;
-            this.pcdataResult = pcData;
-            if (isFinished) {
-                throw new SydApiException(0);
-            }
-            if (length > 4064) {
-                throw new SydApiException(0);
-            }
-            if (0 == sourceWrap.array().length) {
-                if (length < 16) {
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + length);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    sourceWrap = bufferResult;
-                    if (null == this.pcMac || "".equals(this.pcMac)) {
-                        LongDataReturn<String, String> stringStringLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, 0, pcProcData);
-                        pcProcData = stringStringLongDataReturn.getProcData();
-                    } else {
-                        LongDataReturn<String, Boolean> stringBooleanLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, 0, pcProcData, pcMac);
-                        pcProcData = stringBooleanLongDataReturn.getProcData();
-                        return this;
-                    }
-                }
-                if (length % 16 != 0) {
-                    ByteBuffer buffer = ByteBuffer.wrap(pcData);
-                    int remainder = length % 16;
-                    int intercept = length - remainder;
-                    byte[] bytes = new byte[intercept];
-                    ByteBuffer byteBuffer = buffer.get(bytes, 0, intercept);
-                    byte[] bytes1 = new byte[remainder];
-                    byteBuffer.get(bytes1);
-                    this.pcdataResult = bytes;
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + remainder);
-                    bufferResult.put(bytes1);
-                    sourceWrap = bufferResult;
+            else  if (16<=(pcData.length + sourceWrap.array().length)&&(pcData.length + sourceWrap.array().length) % 16 == 0) {
+                int k2 = sourceWrap.array().length+pcData.length;
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + pcData.length);
+                byte[] bytes1 = bytebuffer2ByteArray(sourceWrap);
+                bufferResult.put(bytes1);
+                bufferResult.put(pcData);
+                byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
+                if (null == this.pcMac || "".equals(this.pcMac)) {
+                    LongDataReturn<String, String> stringStringLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, bytes, iPkgNum, pcProcData);
+                    pcProcData = stringStringLongDataReturn.getProcData();
+                    iPkgNum = 2;
+                } else {
+                    LongDataReturn<String, Boolean> stringBooleanLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, bytes, iPkgNum, pcProcData, pcMac);
+                    pcProcData = stringBooleanLongDataReturn.getProcData();
+                    iPkgNum = 2;
                 }
+            } else {
+                ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + length);
+                bufferResult.put(bytebuffer2ByteArray(sourceWrap));
+                bufferResult.put(pcData);
+                byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
+                ByteBuffer buffer = ByteBuffer.wrap(bytes);
+                int remainder = bytes.length % 16;
+                int intercept = bytes.length - remainder;
+                byte[] pcdataByte = new byte[intercept];
+                ByteBuffer byteBuffer = buffer.get(pcdataByte, 0, intercept);
+                byte[] bytes1 = new byte[remainder];
+                byteBuffer.get(bytes1);
+                this.pcdataResult = pcdataByte;
+                ByteBuffer bufferResults = ByteBuffer.allocate(remainder);
+                bufferResults.put(bytes1);
+                sourceWrap = bufferResults;
                 if (null == this.pcMac || "".equals(this.pcMac)) {
                     LongDataReturn<String, String> stringStringLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, iPkgNum, pcProcData);
                     pcProcData = stringStringLongDataReturn.getProcData();
@@ -76,68 +126,16 @@ public class SydSM4Mac {
                     pcProcData = stringBooleanLongDataReturn.getProcData();
                     iPkgNum = 2;
                 }
-            } else {
-                if (16 > pcData.length + sourceWrap.array().length) {
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + length);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    sourceWrap = bufferResult;
-                } else if ((pcData.length + sourceWrap.array().length) % 16 == 0) {
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + length);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
-                    if (null == this.pcMac || "".equals(this.pcMac)) {
-                        LongDataReturn<String, String> stringStringLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, bytes, iPkgNum, pcProcData);
-                        pcProcData = stringStringLongDataReturn.getProcData();
-                        iPkgNum = 2;
-                    } else {
-                        LongDataReturn<String, Boolean> stringBooleanLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, bytes, iPkgNum, pcProcData, pcMac);
-                        pcProcData = stringBooleanLongDataReturn.getProcData();
-                        iPkgNum = 2;
-                    }
-                } else {
-                    ByteBuffer bufferResult = ByteBuffer.allocate(sourceWrap.array().length + length);
-                    bufferResult.put(sourceWrap);
-                    bufferResult.put(pcData);
-                    byte[] bytes = SydSM4Mac.bytebuffer2ByteArray(bufferResult);
-                    ByteBuffer buffer = ByteBuffer.wrap(bytes);
-                    int remainder = bytes.length % 16;
-                    int intercept = bytes.length - remainder;
-                    byte[] pcdataByte = new byte[intercept];
-                    ByteBuffer byteBuffer = buffer.get(pcdataByte, 0, intercept);
-                    byte[] bytes1 = new byte[remainder];
-                    byteBuffer.get(bytes1);
-                    this.pcdataResult = pcdataByte;
-                    ByteBuffer bufferResults = ByteBuffer.allocate(remainder);
-                    bufferResults.put(bytes1);
-                    sourceWrap = bufferResults;
-                    if (null == this.pcMac || "".equals(this.pcMac)) {
-                        LongDataReturn<String, String> stringStringLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, iPkgNum, pcProcData);
-                        pcProcData = stringStringLongDataReturn.getProcData();
-                        iPkgNum = 2;
-                    } else {
-                        LongDataReturn<String, Boolean> stringBooleanLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, pcdataResult, iPkgNum, pcProcData, pcMac);
-                        pcProcData = stringBooleanLongDataReturn.getProcData();
-                        iPkgNum = 2;
-                    }
-                }
             }
-            return this;
-        }catch ( Exception e ) {
-            e.printStackTrace();
-            throw e;
         }
-
+        return this;
     }
-
-
     public LongDataReturn disget() {
 
-        if (isFinished) {
+        if (is_finished) {
             throw new SydApiException(0);
         }
-        this.isFinished = true;
+        this.is_finished = true;
         if (1 == this.iPkgNum) {
             this.iPkgNum = 0;
         } else if (2 == this.iPkgNum) {
@@ -150,6 +148,7 @@ public class SydSM4Mac {
             LongDataReturn<String, Boolean> stringBooleanLongDataReturn = api.SYD_SM4Mac_LongData(iKeyIndex, this.pcdataResult, iPkgNum, pcProcData, pcMac);
             return stringBooleanLongDataReturn;
         }
+
     }
 
     public static byte[] bytebuffer2ByteArray(ByteBuffer buffer) {
@@ -165,4 +164,5 @@ public class SydSM4Mac {
         }
         return bytes;
     }
+
 }