Spring下载文件

转帖地址忘了

/**

* 下载文件

* @param response javax.servlet.http.HttpServletResponse

*/

@RequestMapping("/downloadFile")

public void downloadFile(HttpServletResponse response) {

String fileName = "D://test.txt";

File file = new File(fileName);

FileInputStream in = null;

InputStreamReader isr = null;

response.reset();

response.addHeader("Content-Disposition", "attachment;filename="

+ file.getName());

response.addHeader("Content-Length", "" + file.length());

response.setContentType("bin");

OutputStream toClient;

// 文件不存在时跳出

if (!file.exists()) {

return;

}

String s = null;

StringBuilder sb = new StringBuilder();

try {

in = new FileInputStream(file);

isr = new InputStreamReader(in);

BufferedReader br = new BufferedReader(isr);

while ((s = br.readLine()) != null) {

sb.append(s);

sb.append("/r/n"); // 换行符

}

isr.close();

in.close();

toClient = new BufferedOutputStream(response.getOutputStream());

response.setContentType("application/octet-stream");

toClient.write(sb.toString().getBytes());

toClient.flush();

toClient.close();

} catch (Exception e) {

e.printStackTrace();

}

}