下载文件时，文件名中包含冒号：属于关键字符会导致下载失败

controllers/data_manage/usda_fas_data.go

@@ -1236,8 +1236,10 @@ func (this *BaseFromUsdaFasController) ExportUsdaFasList() {
 	fileName := classifyName
 	if indexCode != "" && len(indexList) == 1 {
 		fileName = indexList[0].IndexName
+		fileName = strings.Replace(fileName, ": ", "_", -1)
 	}
 	fileName += time.Now().Format("06.01.02") + `.xlsx` //文件名称
+	//fmt.Println(fileName)
 	this.Ctx.Output.Download(downLoadnFilePath, fileName)
 	defer func() {
 		os.Remove(downLoadnFilePath)