var servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
var response = servletRequestAttributes.getResponse();
var filename = "a.xls";
response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode( filename, "UTF-8"));
桂棹兮兰桨，击空明兮溯流光。
Original: https://www.cnblogs.com/nanfei/p/16542962.html
Author: 空明流光
Title: java springboot 方法返回 header， javascript 可访问
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