springboot下载模板问题，设置文件名称不生效

先说结论，代码顺序问题

        response.setContentType("application/octet-stream; charset=UTF-8");
        byte[] a = new byte[1000];
        while (-1!=ips.read(a)){
            ops.write(a);
        }
        response.setHeader("Content-Disposition","attachment;fileName=template.xlsx");

setHeader的顺序一定要在write前

修正代码

ClassPathResource classPathResource = new ClassPathResource("template/salary.xlsx");
        InputStream ips = classPathResource.getInputStream();
        OutputStream ops = response.getOutputStream();
        response.setContentType("application/octet-stream; charset=UTF-8");
        response.setHeader("Content-Disposition","attachment;fileName=template.xlsx");
        byte[] a = new byte[1000];
        while (-1!=ips.read(a)){
            ops.write(a);
        }

isCommitted是true导致无法执行后面的set

我们对属性进行debug看下是哪出的问题

因此得出结论，在wirte时，会设置commit=true导致后续设置请求头失效，所以，设置请求头，放在wirte前执行即可