Spring uploads the download file

1,spring configuration file Add File upload configuration

<!--upload Files--<bean id="Multipartresolver" class="Org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!--1GB-<property name="maxuploadsize"Value="1073741824"/> <property name="defaultencoding"Value="Utf-8"/> </bean>

2,html

<form method="Post"accept-charset="UTF-8"th:action="${#httpServletRequest. contextpath+ '/upload '}"Id="Multipartform"Enctype="Multipart/form-data"  class="Form-search"role="form"> <input type="file"Name="file"Size="5"Id="file"/><button type="Submit"Id="multipart" class="btn"> Uploads </button> </form>

3,controller

1@RequestMapping (value ="/upload", method=requestmethod.post)2 @ResponseBody3      PublicString Upload (httpservletrequest request,httpservletresponse response, @RequestParam ("file") multipartfile file) {4         if(File.isempty ()) {5             returnResponsejson.instance (). SetStatus (false). Addalertmessage ("Please select import file! "). ToJSON ();6         }7String filename =file.getoriginalfilename ();8         intindex = Filename.indexof (".");9String File_suffix =filename.substring (Index, Filename.length ());Ten         if(!file_suffix.equals (". txt")) { One             returnResponsejson.instance (). SetStatus (false). Addalertmessage ("Please select TXT format file! "). ToJSON (); A         } -         Try { -BufferedReader reader =NULL; theString usernamestring =NULL; -InputStreamReader ISR =NULL; -             intline =1; -             Try { +ISR =NewInputStreamReader (File.getinputstream (),"Utf-8");//considering the encoding format -Reader =NewBufferedReader (ISR); +                  while((usernamestring = Reader.readline ())! =NULL) { ASystem. out. println (usernamestring); atline++; -                 } -                  -}Catch(FileNotFoundException e) { -                 //TODO auto-generated Catch block -Logger.error ("failed to read file! ", e); in}Catch(IOException e) { -                 //TODO auto-generated Catch block toLogger.error ("failed to read file! ", e); +}finally { - reader.close (); the isr.close (); *                     inch. Close (); $             }Panax Notoginseng}Catch(IOException e) { -             //TODO auto-generated Catch block theLogger.error ("failed to upload file", e); +             returnResponsejson.instance (). SetStatus (false). Addalertmessage ("failed to upload file"). ToJSON (); A         } the         returnResponsejson.instance (). SetStatus (true). ToJSON (); +     } -  $     /** $ * Written in TXT file format -      *  - * @param path the * @throws IOException -      */Wuyi@RequestMapping (value ="/load") the      Public voidWritetxt (httpservletrequest request, httpservletresponse response) throws IOException { -Response.setcontenttype ("Text/plain"); WuResponse.setcharacterencoding ("UTF-8"); -Response.setheader ("content-disposition","Attachment;filename=result.txt"); AboutString name_ip ="This is a TXT file"; $OutputStream Ops =NULL; -         Try { -OPS =Response.getoutputstream (); - Ops.write (Name_ip.getbytes ()); A  +}Catch(IOException e) { the             //TODO auto-generated Catch block -Logger.error ("Write result file exception:", e); $}finally { the ops.close (); the         } the  the}

Spring uploads the download file