Spring mvc file Upload, download function

The first step is to support selecting the front desk for uploading files:[HTML] View plain copy <%@ page language= "java"  contenttype= "Text/html; charset=utf-8"         pageencoding= "UTF-8"%>   <! doctype html public  "-//w3c//dtd html 4.01 transitional//en"   "HTTP// Www.w3.org/TR/html4/loose.dtd ">  

Call the upload.do request in the background

Spring MVC only needs to be annotated @requstmapping ("Your request name") before the request.[Java] View plain copy package hope.cs.zhku.controller;      import java.io.file;    import java.io.filenotfoundexception;   import java.io.fileoutputstream;   import java.io.ioexception;      import javax.servlet.http.httpservletrequest;    import javax.servlet.http.httpservletresponse;      import  org.springframework.stereotype.controller;   import  org.springframework.web.bind.annotation.requestmapping;   import  org.springframework.web.multipart.multipartfile;   import  org.springframework.web.multipart.multiparthttpservletrequest;     /***********************    *  Name: Userbasiceditorcontroller.java </br>   *  Date:2011-8-15</br>   *  features:</br>   *  Written by: Willson huang</br>   *  Review:</br>   *  other:</br>   *  history: (description, modifier, Time) </br>   * 1.create ,Willson Huang ,2011-8-15   **************** /   @Controller    public  class uploadcontroller {           @RequestMapping ("Upload.do")        public string upload (Httpservletrequest request, httpservletresponse response ) {            Multiparthttpservletrequest multiparthttpservletrequest= (multiparthttpservletrequest)  request;            MultipartFile multipartFile =  Multiparthttpservletrequest.getfile ("UploadFile");            String originalfilename=mUltipartfile.getoriginalfilename ();           file file= New file ("File");           if (!file.exists ()) {                file.mkdir ();            }            System.out.println (File.getabsolutepath ());           try  {               fileoutputstream  fileoutputstream=new fileoutputstream (file+ "/uploadfile" +originalfilename.substring ( Originalfilename.lastindexof ('. '),  originalfilename.length ());                fileoutputstream.write (Multipartfile.getbytes ());                 fileoutputstream.flush ();                fileoutputstream.close ();            } catch  (filenotfoundexception e)  {                // TODO Auto-generated catch block                e.printstacktrace ();                return  "Error";            } catch  (ioexception e)  {                // todo auto-generated catch block                e.printstacktrace ();                return  "Error";            }           return  " Uploadsuccess ";       }  } 

Second, the file download

Implementation is front desk:[HTML] View plain copy <%@ page language= "java"  contenttype= "Text/html; charset=utf-8"         pageencoding= "UTF-8"%>   <! doctype html public  "-//w3c//dtd html 4.01 transitional//en"   "HTTP// Www.w3.org/TR/html4/loose.dtd ">  

The front desk fills in the file to download, the background looks up from the folder, if does not have the file to return the error file, otherwise provides the download of any file type (must write the suffix when filling in the file)[Java] View plain copy package hope.cs.zhku.controller;      import java.io.file;    import java.io.fileinputstream;   import java.io.filenotfoundexception;   import java.io.ioexception;   import java.io.inputstream;   import  java.io.outputstream;      import javax.servlet.http.httpservletresponse;      import org.springframework.stereotype.controller;   import  org.springframework.web.bind.annotation.requestmapping;     /******************************    *  Name: userbasiceditorcontroller.java</br >   *  Date:2011-8-15</br>   *  function:</br>   *  written: Willson  Huang</br>   *  Review:</br>   *  other:</br>   *  history :(description, modified by person, time) </br>  * 1.create ,Willson Huang ,2011-8-15   ************************************ /   @Controller    public class  downloadcontroller {           @RequestMapping ("download.do")         public void downloadfile (string filename,httpservletresponse  response) {           response.setcharacterencoding (" Utf-8 ");           response.setcontenttype (" multipart/ Form-data ");              response.setheader (" Content-disposition ", " Attachment;filename= "+filename);            try {               file  file=new file (Filename);               system.out.println ( File.getabsolutepath ());                Inputstream inputstream=new fileinputstream ("file/" +file);                outputstream os=response.getoutputstream ();                byte[] b=new byte[1024];                int length;               while ((Length=inputStream.read (b)) > 0) {                    os.write (b,0,length);                }   &NBSP;&NBsp;          inputstream.close ();            } catch  (filenotfoundexception e)  {                e.printstacktrace ();            } catch  (ioexception e)  {                e.printstacktrace ();            }       }  }