导入临时文件的文件名由时间戳更换为UUID

src/main/java/com/nis/util/excel/ImportBigExcel.java

@@ -14,6 +14,7 @@ import java.util.Comparator;
 import java.util.Date;
 import java.util.List;
 import java.util.Properties;
+import java.util.UUID;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
 
@@ -76,7 +77,7 @@ public class ImportBigExcel extends XLSXCovertCSVReader{
 	 */
 	public ImportBigExcel(MultipartFile multipartFile, Integer headerNum, int sheetIndex) 
 			throws InvalidFormatException, IOException {
-		File upFile=new File(System.currentTimeMillis()+multipartFile.getOriginalFilename());
+		File upFile=new File(UUID.randomUUID()+"_"+multipartFile.getOriginalFilename());
 		upFile.mkdirs();
 		multipartFile.transferTo(upFile);
 		if (!upFile.exists()){