方式一:
@RequestMapping("mydownload")
public ResponseEntity download(HttpServletResponse response) throws IOException {
String path = "D:\\111.ts";
File file = new File(path);
long size = file.length();
//为了解决中文名称乱码问题 这里是设置文件下载后的名称 String fileName = new String("000.ts".getBytes("UTF-8"), "iso-8859-1");
response.reset();
response.setHeader("Accept-Ranges", "bytes");
//设置文件下载是以附件的形式下载 response.setHeader("Content-disposition", String.format("attachment; filename=\"%s\"", fileName));
response.addHeader("Content-Length", String.valueOf(size));
ServletOutputStream sos = response.getOutputStream();
FileInputStream in = new FileInputStream(file);
BufferedOutputStream outputStream = new BufferedOutputStream(sos);
byte[] b = new byte[1024];
int i = 0;
while ((i = in.read(b)) > 0) {
outputStream.write(b, 0, i);
}
outputStream.flush();
sos.close();
outputStream.close();
in.close();
return new ResponseEntity(HttpStatus.OK);
}
方式二：
//文件下载相关代码 与上面的方法类似 @RequestMapping("/download")
public String downloadFile(HttpServletRequest request, HttpServletResponse response) {
String fileName = "111.mov";
if (fileName != null) {
//当前是从该工程的WEB-INF//File//下获取文件(该目录可以在下面一行代码配置) String realPath = request.getServletContext().getRealPath(
"WEB-INF/File/");
File file = new File(realPath, fileName);
if (file.exists()) {
// 设置强制下载不打开 response.setContentType("application/force-download");
// 设置文件名 response.addHeader("Content-Disposition",
"attachment;fileName=" + fileName);
byte[] buffer = new byte[1024];
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
OutputStream os = response.getOutputStream();
int i = bis.read(buffer);
while (i != -1) {
os.write(buffer, 0, i);
i = bis.read(buffer);
}
System.out.println("success");
} catch (Exception e) {
e.printStackTrace();
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
return null;
}
主要原理触发浏览器下载，设置response 响应头为response.setHeader("Content-disposition","attachment; filename=testsprint2.xlsx");
然后通过response.getOutputStream 去写入文件的相应字节
