你知道springmvc要怎样才能够从服务器下载文件吗?很多人对于这个方法都不大了解，那么下面就一起通过实例来学习一下吧。
注意：使用response方式下载文件，不可以使用ajax请求，否则的话就会无反应。
@RequestMapping(value = "exportExcel")
public void exportExcle(HttpServletRequest request, HttpServletResponse response) throws Exception
{
String realPath = request.getSession()
.getServletContext()
.getRealPath("/");
File filePath = new File(realPath + "/tempExclePath");
String path = filePath + "/" + key + ".xlsx";
final File file = new File(path);
fileName = file.getName();
InputStream inputStream;
try
{
inputStream = new BufferedInputStream(new FileInputStream(file));
byte[] buffer = new byte[inputStream.available()];
inputStream.read(buffer);
inputStream.close();
response.reset();
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
response.addHeader("Content-Length", "" + file.length());
OutputStream os = new BufferedOutputStream(response.getOutputStream());
response.setContentType("application/octet-stream");
os.write(buffer);
os.flush();
os.close();
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
if (file.exists())
{ // after download, delete the file on server
(new Thread(new Runnable()
{
@Override
public void run()
{
try
{
Thread.sleep(10000);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
finally
{
try
{
file.delete();
}
catch (Exception e)
{}
}
}
}))
.start();
}
}
}以上就是对于springmvc如何从服务器下载文件的简单介绍了，希望可以对你有所帮助，更多和springmvc相关的知识，请继续关注奇Q工具网的java架构师栏目来了解吧。
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