Swagger怎么下载文件

最近在使用Swagger生成项目的API说明文档，其中就碰到了不能下载文件的问题，困惑了我好几天，终于一次意外解决了问题，后面去深入的了解了一下。
错误代码

	@ResponseBody
	@RequestMapping(value = "/downloadInfo")
	@ApiOperation(value = "下载信息", httpMethod = "GET", notes = "下载符合条件的Excel",produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
	public ResultBody downloadInfo(HttpSession session,HttpServletRequest request, HttpServletResponse response) {
		String filename = StringUtil.encodeDownloadFileName("DownloadInfo" + DateUtil.yyyyMMdd.format(new Date()) + ".xlsx", userAgent);
		response.setHeader("Content-disposition", "attachment; filename=" + filename);
		response.setContentType("application/vnd.ms-excel");
	}

使用上面的代码始终不能下载，一直报错：
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
最后看了MediaType中罗列的contentType，发现根本就没有application/vnd.ms-excel，有application/octet-stream，使用流下载文件，最后成功解决不能下载的问题

正确代码

	@ResponseBody
	@RequestMapping(value = "/downloadInfo")
	@ApiOperation(value = "下载信息", httpMethod = "GET", notes = "下载符合条件的Excel",produces = 	MediaType.APPLICATION_OCTET_STREAM_VALUE)
	public ResultBody downloadInfo(HttpSession session,HttpServletRequest request, HttpServletResponse response) {
		String filename = StringUtil.encodeDownloadFileName("DownloadInfo" + DateUtil.yyyyMMdd.format(new Date()) + ".xlsx", userAgent);
		response.setHeader("Content-disposition", "attachment; filename=" + filename);
	}

注意要去掉setContentType

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