Java File upload download

Using the SPRINGMVC architecture, only the key code is posted, the other is an introduction.

Upload:

JSP page

<form action= "${pagecontext.request.contextpath}/uploadhandleservlet" method= "post" enctype= "multipart/ Form-data "> Upload user x:<input type=" text "name=" username "><br/> upload file 1:<input type=" file "name=" file 1 "><br/> <input type=" Submit "value=" Submission "> </form>

Background code

Simpledateformat sdf1 = new simpledateformat ("Yyyymmddhhmmss"); String savepath =request.getsession (). Getservletcontext (). Getrealpath ("/web-inf/upload");  File  file = new file (Savepath); if  (!file.exists ())  { file.mkdir ();  }  string message = "";  try{  diskfileitemfactory factory = new  diskfileitemfactory ();   factory.setsizethreshold (1024*100);    Factory.setrepository (file);    servletfileupload upload = new  Servletfileupload (Factory);   upload.setheaderencoding ("UTF-8");  list<fileitem>  list = upload.parserequest (Request),  //regular match, filter path take file name    string regexp  =  ". +\\\\ (. +) $";   pattern p = pattern.compile (REGEXP);   string  filename= "";  for (fileitem item : list) { if (iTem.isformfield ()) { string name = item.getfieldname ();          string value = item.getstring ("UTF-8");          system.out.println (name +  "="  + value); }else{ string  Name = item.getname ();   name = name.substring (Name.lastindexof ("\ \") +1);   filename = savepath+ "/" + sdf1.format (New date ())  +  "_" +name;    item.write (New file (fileName));  } }  message =  "File Upload succeeded! "; }catch  (exception e)  { message= " File upload failed! ";      e.printstacktrace ();}

File download

Get file name and file path string name = Map.get ("name") + ""; String Path = map.get ("path") + ""; String Filename= new String (Name.getbytes ("Utf-8"), "iso8859-1"); File File = new file (path); InputStream fis = new Bufferedinputstream (new FileInputStream (path)); byte[] buffer = new Byte[f Is.available ()];fis.read (buffer); Fis.close (); Response.reset (); Response.AddHeader ("Content-disposition", " Attachment;filename= "+ New String (Name.replaceall (" "," "). GetBytes (" Utf-8 ")," iso8859-1 "); Response.AddHeader (" Content-length "," "+ file.length ()), OutputStream OS = new Bufferedoutputstream (Response.getoutputstream ()); Response.setcontenttype ("Application/octet-stream"); os.write (buffer);//Output file Os.flush (); Os.close ();

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Java File upload download