diff --git a/doc/java接口说明文档.docx b/doc/java接口说明文档.docx
index 1443ad4..6ee337c 100644
Binary files a/doc/java接口说明文档.docx and b/doc/java接口说明文档.docx differ
diff --git a/src/main/java/com/sunyard/inf/SydGenApi.java b/src/main/java/com/sunyard/inf/SydGenApi.java
index 98237ec..17cf41b 100644
--- a/src/main/java/com/sunyard/inf/SydGenApi.java
+++ b/src/main/java/com/sunyard/inf/SydGenApi.java
@@ -226,7 +226,7 @@ public interface SydGenApi {
      * SessionKey 本地LMK 加密的会话密钥，HEX 格式, 本地 LMK 加密的会话密钥长度，HEX 格式(不包括第 1 个字符)，一般为 33 个 Bytes。默认输入值为缓冲区的大小。
      * KCV 会话密钥的检验值，HEX 格式，长度为 32H。
      */
-    RetWrap generateDEByDn(byte[] certSerial, String oData);
+    RetWrap generateDEByDn(String certSerial, String oData);
 
     /**
      * 产生对称密钥，通过公钥加密生成网联格式的数字信封。
@@ -308,7 +308,7 @@ public interface SydGenApi {
      * KCV 会话密钥的检验值，HEX 格式，长度为 36H。
      * orgCode 如果有机构码的话会返回机构码
      */
-    RetWrap decryptDEByDN(byte[] certSerial, String pCipherKey);
+    RetWrap decryptDEByDN(String certSerial, String pCipherKey);
 
     /**
      * 接收用私钥解密数字信封，还原对称密钥。
diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index 908e32c..8dcb751 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -2194,8 +2194,14 @@ public class SydApi4j implements SydApi {
     }
 
     @Override
-    public RetWrap generateDEByDn(byte[] certSerial, String oData) {
-        return generateDE(certSerial, 3, 1, oData);
+    public RetWrap generateDEByDn(String certSerial, String oData) {
+        byte[] dnBytes = null;
+        try {
+            dnBytes = certSerial.getBytes("gbk");
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+        }
+        return generateDE(dnBytes, 3, 1, oData);
     }
 
     @Override
@@ -2308,8 +2314,14 @@ public class SydApi4j implements SydApi {
     }
 
     @Override
-    public RetWrap decryptDEByDN(byte[] certSerial, String pCipherKey) {
-        return decryptDE(true, 1, certSerial, pCipherKey);
+    public RetWrap decryptDEByDN(String certSerial, String pCipherKey) {
+        byte[] dnBytes = null;
+        try {
+            dnBytes = certSerial.getBytes("gbk");
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+        }
+        return decryptDE(true, 1, dnBytes, pCipherKey);
     }
 
     // 测试通过
diff --git a/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java b/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java
index f5f87bc..1d80206 100644
--- a/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java
+++ b/src/test/java/com/sunyard/sydapi/test/TestAllMethods.java
@@ -1430,12 +1430,12 @@ public class TestAllMethods {
         String dn = "C=CN,O=CFCA OCA1,OU=YCCA,OU=Individual-2,CN=YCCA@黄金交易所@Zhuangj@1";
         String oData = "00001111222233";
 
-        RetWrap retWrap = api.generateDEByDn(dn.getBytes("gbk"), oData);
+        RetWrap retWrap = api.generateDEByDn(dn, oData);
         String CipherKey = (String) retWrap.get(SydApi.RET_CIPHER_KEY);
         String sessionKey = (String) retWrap.get(SydApi.RET_SESSION_KEY);
         printRetWrap(retWrap);
 
-        RetWrap retWrap1 = api.decryptDEByDN(dn.getBytes("gbk"), CipherKey);
+        RetWrap retWrap1 = api.decryptDEByDN(dn, CipherKey);
         printRetWrap(retWrap1);
     }
 
diff --git a/src/test/java/com/sunyard/sydapi/test/TestHT.java b/src/test/java/com/sunyard/sydapi/test/TestHT.java
index 006201d..b2ef83b 100644
--- a/src/test/java/com/sunyard/sydapi/test/TestHT.java
+++ b/src/test/java/com/sunyard/sydapi/test/TestHT.java
@@ -126,13 +126,43 @@ public class TestHT {
         String dn = "C=CN,O=CFCA OCA1,OU=YCCA,OU=Individual-2,CN=YCCA@黄金交易所@Zhuangj@1";
         String oData = "00001111222233";
 
-        RetWrap retWrap = api.generateDEByDn(dn.getBytes("gbk"), oData);
-        String CipherKey = (String) retWrap.get(SydApi.RET_CIPHER_KEY);
-        String sessionKey = (String) retWrap.get(SydApi.RET_SESSION_KEY);
-        printRetWrap(retWrap);
+        RetWrap retWrap = api.generateDEByDn(dn, oData);
+        String cipherKey = (String) retWrap.get(SydApi.RET_CIPHER_KEY);
+        System.out.println("数字信封: " + cipherKey);
+
+        RetWrap retWrap1 = api.decryptDEByDN(dn, cipherKey);
+        System.out.println("原数据: " + retWrap1.get("oData"));
+    }
+
+    /**
+     * 流程演示
+     */
+    @Test
+    public void testProcess() {
+        String dn = "C=CN,O=CFCA OCA1,OU=YCCA,OU=Individual-2,CN=YCCA@黄金交易所@Zhuangj@1";
+        String orgData = "111111213323143243243";
+
+        // 签名
+        String sign = api.attachedSign(orgData.getBytes(), dn);
+        System.out.println("签名结果: " + sign);
+
+        // 生成数字信封
+        RetWrap retWrap = api.generateDEByDn(dn, sign);
+        String cipherKey = (String) retWrap.get(SydApi.RET_CIPHER_KEY);
+        System.out.println("数字信封: " + cipherKey);
+
+        // 解密数字信封
+        RetWrap retWrap1 = api.decryptDEByDN(dn, cipherKey);
+        String oData = (String) retWrap1.get("oData");
+        System.out.println("原数据: " + retWrap1.get("oData"));
+
+        // 验签
+        RetWrap verify = api.attachedVerifyAndGetAll(oData);
+        if (verify != null) {
+            System.out.println("x509公钥: " + Util.bytes2HexString(((X509)verify.get("x509")).getPubKey()));
+            System.out.println("签名原数据: " + verify.get("oData"));
+        }
 
-        RetWrap retWrap1 = api.decryptDEByDN(dn.getBytes("gbk"), CipherKey);
-        printRetWrap(retWrap1);
     }
 
     // 测试通过