我需要知道如何从Servlet输出Excel文件

Question

So, I am writing a java servlet. The user goes to the servlet and they automatically are prompted to download or open the excel file. How do I do this? I have the excel file in my webcontent folder. I know it's pretty elementary, but I've always been bad at the file and outputstream and inputstream stuff.

Answer 1

response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment; filename=sampleName.xls");

and then pipe the file contents to the response.getOutputStream

Answer 2

I have the excel file in my webcontent folder

Just link to it directly. The servletcontainer's builtin default servlet will then worry about the streaming and setting the proper headers.

<a href="filename.xls">Download filename.xls</a>