File download with Springmvc for file upload and download

Next, the file download needs to obtain the download file storage path, here is only manually fill in, if it is in a specific project, you can save the file name and upload the storage path in the database. Then add a file list of the page to show the file name and file path, and then click on the download when the corresponding file name and path to the background operation.

[Java]View PlainCopy 

2. /**
4. * File download requires file name and file address
6. *
8. * @author: Tuzongxun
10. * @Title: Download
12. * @[email Protected] Name
14. * @[email protected] Path
16. * @[email protected]
18. * @[email protected] IOException
20. * @returnResponseEntity <byte[]>
22. * @date APR 28,2016 1:21:32 PM
24. * @throws
26. */
28. @RequestMapping (value = "/downloadfile.do")
30. Public responseentity<byte[]> Download (@RequestParam ("name") String name,
32. @RequestParam ("FilePath") String path) throws IOException {
34. File File = new file (path);
36. Httpheaders headers = new Httpheaders ();
38. String fileName = new String (Name.getbytes ("UTF-8"), "iso-8859-1"); In order to solve the problem of Chinese name garbled
40. Headers.setcontentdispositionformdata ("attachment", fileName);
42. Headers.setcontenttype (Mediatype.application_octet_stream);
44. return new responseentity<byte[]> (fileutils.readfiletobytearray (file),
46. headers, httpstatus.created);
48. }

HTML page, here is simply fill in the filename and file path, with form form submitted to the background, and then the background will control response in the page pop-up Save file path selection box, of course, here in the background I did not do what processing, if the file does not exist will be error, can be processed accordingly:

[HTML]View PlainCopy  

2. File Download:
4. </br> </br>
6. <form action= "./downloadfile.do"style= "border:1px solid Grey;width:auto;" method="POST">
8.             file name: < input type= "text"  name= "name" /></br></br >  
10. File path:<input type="text" name="FilePath"/></br></ br>
12. <input type="Submit" value= "confirm Download"/>
14. </form>

The page view is as follows:

If the file does not exist, the error is as follows:

File download with Springmvc for file upload and download