springMVC相关-文件下载
1.加入jar包:
commons-fileupload-1.3.1.jar
commons-io-2.4.jar2.<a href="${pageContext.request.contextPath }/testdownload">文件下载</a><br/>
用ResponseEntity<byte[]> 返回值完成文件下载:
@RequestMapping(value="/testResponseEntity") public ResponseEntity<byte[]> testResponseEntity(HttpServletRequest request) throws Exception{ byte[] body = null; ServletContext servletContext = request.getServletContext(); String fileName = "风吹麦浪.mp3"; String path = servletContext.getRealPath("/WEB-INF/"+fileName); File file = new File(path); InputStream in = new FileInputStream(file); body = new byte[in.available()]; in.read(body); HttpHeaders headers = new HttpHeaders(); fileName = new String(fileName.getBytes("gbk"),"iso8859-1"); headers.add("Content-Disposition", "attachment;filename="+fileName); HttpStatus statusCode=HttpStatus.OK; ResponseEntity<byte[]> response = new ResponseEntity<byte[]>(body, headers, statusCode); return response; }
其中,ResponseEntity<byte[]>代替输出流作用。
通过标签(如<a>)链接到该方法,执行后浏览器页面显示对风吹麦浪.mp3的下载窗口。(风吹麦浪.mp3音频文件位于服务器WEB-INF目录下,不被浏览器直接访问)