js 下载文件 修改文件名

时间:2022-06-05 20:39:53

用js下载文件,使用<a>标签,添加download属性即可。

var a = document.createElement("a");
a.href
= "http://XXX.com/audioStream/8a9dbae9d0859e48fc1f590fcf6d4ccc.mp3";
a.download
="test.mp3";
a.click();

但是如果想给文件重新命名,貌似js无法实现。

因此考虑后台实现,用java代理请求,获取文件设置文件名,返回到前端。

public void downFiles(HttpServletResponse response,String url,String workInfoId,int type){
try{
String prefix
= type == 1 ? "wav" : "txt";
url
= type == 1 ? url : (url + "?textInfoId="+workInfoId);
HttpEntity entity
= Request.Get(url).
execute().returnResponse().getEntity();
byte[] bys = EntityUtils.toByteArray(entity);
//获取作品名称
Works works = this.worksDao.findByWorkId(workInfoId);
String name
= (works!=null && StringUtils.isNotBlank(works.getName())) ? works.getName() : Long.toString(new Date().getTime());
response.setHeader(
"Content-Disposition", "attachment; filename="+ new String(name.getBytes("utf-8"), "ISO-8859-1")+"."+prefix);
OutputStream out
= response.getOutputStream();
out.write(bys);
out.close();
}
catch (Exception e){
e.printStackTrace();
}

}