response.reset();
File excelFile = new File(filePath);
// 1.设置文件ContentType类型,这样设置,会自动判断下载文件类型
response.setContentType("application/octet-stream");
// 2.设置文件头:处理文件名编码,防止不同浏览器中文的文件名出现乱码
String headerValue = "attachment;";
String fileName = "体验馆报名名单.xlsx";
headerValue += " filename=\"" + fileOperationService.encodeURIComponent(fileName) + "\";";
headerValue += " filename*=utf-8''" + fileOperationService.encodeURIComponent(fileName);
response.setHeader("Content-Disposition", headerValue);
response.addHeader("Content-Length", String.valueOf(excelFile.length()));
// 通过文件流下载
try {
InputStream ins = new BufferedInputStream(new FileInputStream(excelFile));
byte[] buffer = new byte[ins.available()];
ins.read(buffer);
ins.close();
OutputStream ous = new BufferedOutputStream(response.getOutputStream());
ous.write(buffer);
ous.flush();
ous.close();
} catch (IOException e) {
e.printStackTrace();
}
ajax请求只是个“字符型”的请求,即请求的内容是以文本类型存放的。文件的下载是以二进制形式进行的,虽然可以读取到返回的response,但只是读取而已,是无法执行的。
解决方案,不用ajax:
window.location.href=_contextPath + "/signUp/exportSignUpList.do"