Spring : File Upload

case  1

<form method="POST" action="uploadFile" enctype="multipart/form-data">

File to upload: <input type="file" name="file"><br /> 

Name: <input type="text" name="name"><br /> <br /> 

<input type="submit" value="Upload"> Press here to upload the file!

</form>

case 2

<form method="POST" action="uploadMultipleFile" enctype="multipart/form-data">

File1 to upload: <input type="file" name="file"><br /> 

Name1: <input type="text" name="name"><br /> <br /> 

File2 to upload: <input type="file" name="file"><br /> 

Name2: <input type="text" name="name"><br /> <br />

<input type="submit" value="Upload"> Press here to upload the file!

</form>

package com.journaldev.spring.controller;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

/**
 * Handles requests for the application file upload requests
 */
@Controller
public class FileUploadController {

 private static final Logger logger = LoggerFactory
   .getLogger(FileUploadController.class);

 /**
  * Upload single file using 

        Spring Controller
  */
 @RequestMapping(value = "/uploadFile", method = RequestMethod.POST)
 public @ResponseBody
 String uploadFileHandler(@RequestParam("name") String name,
   @RequestParam("file") MultipartFile file) {

  if (!file.isEmpty()) {
   try {
    byte[] bytes = file.getBytes();

    // Creating the directory to store file
    String rootPath = System.getProperty("catalina.home");
    File dir = new File(rootPath + File.separator + "tmpFiles");
    if (!dir.exists())
     dir.mkdirs();

    // Create the file on server
    File serverFile = new File(dir.getAbsolutePath()
      + File.separator + name);
    BufferedOutputStream stream = new BufferedOutputStream(
      new FileOutputStream(serverFile));
    stream.write(bytes);
    stream.close();

    logger.info("Server File Location="
      + serverFile.getAbsolutePath());

    return "You successfully uploaded file=" + name;
   } catch (Exception e) {
    return "You failed to upload " + name + " => " + e.getMessage();
   }
  } else {
   return "You failed to upload " + name
     + " because the file was empty.";
  }
 }

 /**
  * Upload multiple file using 

            Spring Controller
  */

 @RequestMapping(value = "/uploadMultipleFile", method = RequestMethod.POST)
 public @ResponseBody
 String uploadMultipleFileHandler(@RequestParam("name") String[] names,
   @RequestParam("file") MultipartFile[] files) {

  if (files.length != names.length)
   return "Mandatory information missing";

  String message = "";
  for (int i = 0; i < files.length; i++) {
   MultipartFile file = files[i];
   String name = names[i];
   try {
    byte[] bytes = file.getBytes();

    // Creating the directory to store file
    String rootPath = System.getProperty("catalina.home");
    File dir = new File(rootPath + File.separator + "tmpFiles");
    if (!dir.exists())
     dir.mkdirs();

    // Create the file on server
    File serverFile = new File(dir.getAbsolutePath()
      + File.separator + name);
    BufferedOutputStream stream = new BufferedOutputStream(
      new FileOutputStream(serverFile));
    stream.write(bytes);
    stream.close();

    logger.info("Server File Location="
      + serverFile.getAbsolutePath());

    message = message + "You successfully uploaded file=" + name
      + "
";
   } catch (Exception e) {
    return "You failed to upload " + name + " => " + e.getMessage();
   }
  }
  return message;
 }
}