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Javaweb 上传及下载文件

1. 下载文件

1. Controller

@RequestMapping(value = "/t20/reportDownload", method = RequestMethod.GET, produces = "application/json;charset=UTF-8")
@ResponseBody
public String reportDownload(HttpServletRequest request, HttpServletResponse response) {
	return t20Service.reportDownload(request, response);	
}

2. Response

response.setHeader("content-type", "application/octet-stream");
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
response.getOutputStream().write(pdfbytes);
response.getOutputStream().flush();
return "successfully";

3. 前端

不能使用ajax, 因为它返回的是字符格式, 有时候不弹出下载框

$.ajax({
   url:"/down/downExcel",
   type:"GET",
   dataType:"json",
   success:function(result){
}});

使用 window.location.href="/down/downExcel";

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