如何在swagger ui中传递字符串数组作为参数

下面是我想用Swagger UI记录的REST api

  @ApiOperation(
              nickname = "alertForBundleId",
              value = "alertForBundleId",
              notes = "",
              httpMethod = "GET")
  def alertForBundleId(
                @ApiParam(name = "mfr", value = "Manufacturer", required = true) @PathParam("mfr") mfr: String,
                @ApiParam(name = "col", value = "Columns", required = true) @QueryParam("col") cols: List[String])){...}

这里cols参数接受字符串List.
当我传递两个元素用于按新行分隔的列表时,它生成的url是

什么样的？col = sysid%2Calert_id

虽然它应该像

？col = sysid&col = alert_id

它适用于单个元素列表
任何帮助将不胜感激.