修改YYYY为yyyy

gic-enterprise-download/src/main/java/com/gic/download/utils/DownloadUtils.java

 package com.gic.download.utils;
 
-import java.io.*;
-import java.text.SimpleDateFormat;
-import java.util.*;
-
-import javax.servlet.http.HttpServletResponse;
-
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.serializer.SerializerFeature;
 import com.gic.download.constants.ExcelExtensionEnum;
@@ -27,6 +21,14 @@ import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.ss.usermodel.*;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 
+import javax.servlet.http.HttpServletResponse;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
 public class DownloadUtils {
     private static final Logger LOGGER = LogManager.getLogger(DownloadUtils.class);
 
@@ -320,7 +322,7 @@ public class DownloadUtils {
             out.flush();
             tempFile.deleteOnExit();
             //上传文件
-            SimpleDateFormat sdf = new SimpleDateFormat("YYYYMMddHHmmss");
+            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
             String fieldCode = "/" + fileName + "_" + sdf.format(new Date()) + ExcelExtensionEnum.getExtensionByCode(excelExtensionCode);
             LOGGER.info("上传文件到腾讯云，文件名：" + fieldCode);
             //文件存进腾讯云