File upload and file download under the SSM framework

Recently in a project to do a SSM, encountered the addition of attachments and download features, in the online search a lot of information, found that many are not good use, after groping, found a set of simple methods, and share with you.
1. File Upload
The front page uses Easyui, the code is as follows:

<table><tr><td> accessories </td><td><input class= "Easyui-filebox" type= "file" Name= "File1" Id= "File1" ><a href= "Javascript:imageupload ()" class= "Easyui-linkbutton" > Upload </a></td><td ><input type= "hidden"  id= "Ssfile" name= "Ssfile" > <!--for file name Echo--></td></tr><table

JS method call Backstage:

function Imageupload () {var file1 = document.getElementById ("File1");  var ssfile = document.getElementById ("Ssfile");      Ssfile.value = file1.value.substring (n);    Remove the file name and assign a value echo to the text box, which is used to pass the file name $.ajaxfileupload to the background        ({            URL: ' ${pagecontext.request.contextpath}/bug/ Uploadfile.do ',//server-side request address for file upload            fileelementid: ' file1 ',//File upload Space id attribute  <input type= "file" id= "file" name = "File"/>            type: ' Post ',            dataType: ' text ',//return value type is generally set to JSON            success:function (data, status)//server Success Response Place function            {                alert ("File upload succeeded")            ,            error:function (data, status, E)//server response failure handler            {                alert (" File upload failed ");}}        );    

Background implementation:

@RequestMapping (value= "/uploadfile.do", produces= "Text/html;charset=utf-8") public @ResponseBody String IMPORTPICFI Le1 (@RequestParam multipartfile file1,httpservletrequest request) {map<string,object& Gt                 map= new hashmap<string,object> ();                      if (File1.isempty ()) {map.put ("result", "error");                Map.put ("msg", "Upload file cannot be empty");                      } else{String originalfilename=file1.getoriginalfilename ();                     String Filebasename=filenameutils.getbasename (originalfilename);                    Date now = new Date ();                     SimpleDateFormat df = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");                       String flodername=filebasename+ "_" +df.format (now);                         try{//Create the path to upload file Fdir = new file ("D:/file");                     if (!fdir.exists ()) {     Fdir.mkdirs (); }//file is uploaded to the path under FileUtils.                             Copyinputstreamtofile (File1.getinputstream (), New File (Fdir,originalfilename));                                                  Coding Map.put ("result", "success");                            } catch (Exception e) {map.put ("result", "error");                                                  Map.put ("msg", E.getmessage ());   }                }

2. File download

Front page:

<table><tr><td> accessories </td><td><a href= "" id= "Ssurl" class= "Easyui-linkbutton" > download </a></td></tr></table>

JS Method:

Background method:

/** * File Download * @throws IOException */@RequestMapping (value= "/download", method=requestmethod.get) public void Download (@RequestParam (value= "filename") String filename, httpservletrequest request, Httpservle           Tresponse response) throws IOException {//analog file, myfile.txt for files that need to be downloaded String path = "D:\\file" + "\ \" +filename;        Gets the input stream InputStream bis = new Bufferedinputstream (new FileInputStream (path));          Transcoding, so that the file name in Chinese garbled filename = urlencoder.encode (filename, "UTF-8");            Set File Download Header Response.AddHeader ("Content-disposition", "attachment;filename=" + filename);           1. Set the file contenttype type, this setting, will automatically determine the download file type Response.setcontenttype ("Multipart/form-data");          Bufferedoutputstream out = new Bufferedoutputstream (Response.getoutputstream ());          int len = 0;              while (len = Bis.read ())! =-1) {out.write (len);          Out.flush (); } out. Close (); }

My pro-test can be used, we have any ideas to exchange, the first time to write a blog, if there are omissions, please advise!

File upload and file download under the SSM framework