2020-07-02 java后端文件下载
@RequestMapping(value="/getfile")
public void download(HttpServletResponse response,HttpServletRequest request) {
String path = request.getParameter("path");
File file = new File(path);
InputStream is = null;
OutputStream out = null;
try {
response.reset();
response.setHeader("Content-Disposition", "attachment; filename="+URLEncoder.encode(tfile.getFilename(), "UTF-8"));
response.addHeader("Content-Length", "" + file.length());
response.setContentType("application/octet-stream; charset=UTF-8");
//设置跨域
response.setHeader("Access-Control-Allow-Origin","*");
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Allow-Methods", "POST,GET,OPTIONS,DELETE,PATCH,PUT");
response.setHeader("Access-Control-Allow-Headers", "Origin,X-Requested-With,x-requested-with,X-Custom-Header," +"Content-Type,Accept,Authorization");
String method01 = request.getMethod();
if ("OPTIONS".equalsIgnoreCase(method01)){
response.setStatus(HttpServletResponse.SC_ACCEPTED);
}
is = new FileInputStream(file);
out = response.getOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while((len = is.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch(IOException e) {
e.printStackTrace();
}finally {
try {
if(is != null) {
is.close();
}
if(out != null) {
out.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
