Spring mvc 文件下载

 

1. @Controller  
2. public class DownloadController {  
3.   
4.     @RequestMapping("download.htm")  
5.     public void downloadFile(String fileName,HttpServletResponse response){  
6.         response.setCharacterEncoding("utf-8");  
7.         response.setContentType("multipart/form-data");  
8.   
9.         response.setHeader("Content-Disposition", "attachment;fileName="+fileName);  
10.         try {  
11.             File file=new File(fileName);  
12.             System.out.println(file.getAbsolutePath());  
13.             InputStream inputStream=new FileInputStream("file/"+file);  
14.             OutputStream os=response.getOutputStream();  
15.             byte[] b=new byte[1024];  
16.             int length;  
17.             while((length=inputStream.read(b))>0){  
18.                 os.write(b,0,length);  
19.             }  
20.             inputStream.close();  
21.         } catch (FileNotFoundException e) {  
22.             e.printStackTrace();  
23.         } catch (IOException e) {  
24.             e.printStackTrace();  
25.         }  
26.     }  
27. }