spring mvc文件下载

http://blog.youkuaiyun.com/nohero1/article/details/41476855

方法有两种：

 

        比较优雅的

       

[java]  view plain  copy

1. @RequestMapping("/export")  
2.     public ResponseEntity<byte[]> export() throws IOException {  
3.         HttpHeaders headers = new HttpHeaders();    
4.         headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);    
5.         headers.setContentDispositionFormData("attachment", "dict.txt");    
6.         return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(new File("C:/Users/Administrator/Desktop/a.txt")),    
7.                                               headers, HttpStatus.CREATED);    
8.     }