Spring MVC 文件下载
2018-04-14 18:33:33
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/**
* 下载
* @param model
* @param request
* @param response
* @return
* @throws Exception
*/
@RequestMapping(params="method=download", method=RequestMethod.GET)
public String download(ModelMap model,String dirName,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//文件路径
String path = "c://1.rar";
String fileName = "rar";//获取文件名,含后缀
File file = new File(path);
response.reset();
response.setContentType("application/octet-stream; charset=UTF-8");
fileName = URLEncoder.encode(fileName, "UTF-8");//IE浏览器
response.addHeader("Content-Disposition","attachment;filename="+fileName);
response.setContentLength((int) file.length());
byte[] buffer = new byte[4096];
BufferedOutputStream output = null;
BufferedInputStream input = null;
// 写缓冲区:
try {
output = new BufferedOutputStream(response.getOutputStream());
input = new BufferedInputStream(new FileInputStream(file));
int n = (-1);
while ((n = input.read(buffer, 0, 4096)) > -1) {
output.write(buffer, 0, n);
}
response.flushBuffer();
}
catch (Exception e) {
} // maybe user cancelled download
finally {
if (input != null) input.close();
if (output != null) output.close();
}
return null;
}
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