Java Web中下载文件时,我们一般设置Content-Disposition告诉浏览器下载文件的名称,是否在浏览器中内嵌显示.
Content-disposition: inline; filename=foobar.pdf
表示浏览器内嵌显示一个文件
Content-disposition: attachment; filename=foobar.pdf
表示会下载文件,如火狐浏览器中
spring mvc中
Java代码 
- @ResponseBody
- @RequestMapping(value = "/download",produces="application/octet-stream")
- public byte[] downloadFile(HttpServletRequest request, HttpServletResponse response,String contentType2)
- throws IOException {
- byte[]bytes=FileUtils.getBytes4File("D:\\Temp\\cc.jpg");
- response.addHeader("Content-Disposition", "inline;filename=\"a.jpg\"");
- return bytes;
- }
如上代码中是内嵌显示图片呢?还是会弹框下载呢?
答案是:弹框下载
为什么呢?设置为inline应该是内嵌显示啊!
因为response content type设置成了"application/octet-stream"
注意:我们说是内嵌显示还是下载,那一定是针对可内嵌显示的类型,例如"image/jpeg","image/png"等.
看下面的例子:设置response content type为"image/jpeg"
Java代码
- @ResponseBody
- @RequestMapping(value = "/download",produces="image/jpeg")
- public byte[] downloadFile(HttpServletRequest request, HttpServletResponse response,String contentType2,String downloadType)
- throws IOException {
- byte[]bytes=FileUtils.getBytes4File("D:\\Temp\\cc.jpg");
- response.addHeader("Content-Disposition", downloadType+";filename=\"a.jpg\"");
- return bytes;
- }
在浏览器中访问:http://localhost:8080/tv_mobile/video/download?downloadType=inline 时就内嵌显示:
当在浏览器中访问:http://localhost:8080/tv_mobile/video/download?downloadType=attachment 时就弹框下载.
参考:http://hw1287789687.iteye.com/blog/2188480