diff --git a/pay-java-union/README.md b/pay-java-union/README.md
index ce82aba..f392343 100644
--- a/pay-java-union/README.md
+++ b/pay-java-union/README.md
@@ -114,7 +114,7 @@
 #### 文件传输类接口：后台获取对账文件交易，只有同步应答
  
  ```java
-       String fileConten =   service.downloadbill(null,"文件类型，一般商户填写00即可"); 
+       String fileConten =   service.downloadbill("清算日期格式MMDD","文件类型，一般商户填写00即可"); 
 ``` 
 
        
\ No newline at end of file
diff --git a/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java b/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java
index 01bd67c..c1b41be 100644
--- a/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java
+++ b/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java
@@ -617,7 +617,7 @@ public class UnionPayService extends BasePayService {
         Map<String ,Object > params = this.getCommonParam();
         UnionTransactionType.FILE_TRANSFER.convertMap(params);
         DateFormat df = new SimpleDateFormat("MMDD");
-        params.put(SDKConstants.param_settleDate,df.format(new Date()));
+        params.put(SDKConstants.param_settleDate,df.format(billDate));
         params.put(SDKConstants.param_fileType,billType);
         this.setSign(params);
         String responseStr =  getHttpRequestTemplate().postForObject(this.getFileTransUrl(),params,String.class);
diff --git a/pay-java-union/src/test/java/PayTest.java b/pay-java-union/src/test/java/PayTest.java
index dbdeff0..6fe0356 100644
--- a/pay-java-union/src/test/java/PayTest.java
+++ b/pay-java-union/src/test/java/PayTest.java
@@ -7,6 +7,7 @@ import com.egzosn.pay.union.bean.UnionTransactionType;
 import java.awt.image.BufferedImage;
 import java.math.BigDecimal;
 import java.text.SimpleDateFormat;
+import java.util.Date;
 import java.util.Map;
 
 /**
@@ -83,7 +84,7 @@ public class PayTest {
 
 
         /*-----------文件传输类接口：后台获取对账文件交易，只有同步应答 ------------------------------*/
-        String fileConten =   service.downloadbill(null,"文件类型，一般商户填写00即可");      /*-----------退货交易：后台资金类交易，有同步应答和后台通知应答------------------------------*/
+        String fileConten =   service.downloadbill(new Date(),"文件类型，一般商户填写00即可");      /*-----------退货交易：后台资金类交易，有同步应答和后台通知应答------------------------------*/
 
 
          /*-----------回调处理-------------------*/