http下载文件

public void downloadFile(String fileName,String zipPath, HttpServletResponse response){
InputStream file = null;
ServletOutputStream servletOutputStream = null;
try {
file = new FileInputStream(new File(zipPath));
response.setHeader(“Content-Disposition”, “attachment;filename=”" + fileName+""");
servletOutputStream = response.getOutputStream();
int len;
byte[] buffer = new byte[1024];
while((len=file.read(buffer)) > 0){
servletOutputStream.write(buffer, 0, len);
}
} catch (Exception e) {
e.printStackTrace();
}finally {
try {
file.close();
servletOutputStream.flush();
servletOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}