spring upload file

Attachable.java

public interface Attachable {
  
  public File getFile(); 
  public String getTitle();
  public String getDescription();
  public String getRealFileName();
  public Double getSize();//double?
  public void saveFile(File destination);
  
}

Attachment.java

package somepackagename.here;

import java.io.IOException;
import java.util.Date;
import java.util.HashMap;

import javax.servlet.http.HttpServletResponse;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
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.bind.annotation.ResponseStatus;
import org.springframework.web.multipart.MultipartFile;

import org.apache.commons.io.FilenameUtils;
import java.util.UUID;

/**
 * api controller for user info . basic info and paging garden
 * 
 * @author oaktree
 *
 */

public class AttachmentResource implements Attachable{
  private static final Logger LOGGER = LogManager.getLogger(Attachment.class);

  private MultipartFile data;
  private File file;
  private String title;
  private String description;
  private String realFileName; //generated  
  
  /**
  * if already bean genereated that return it otherwise generate,save the name return the result
  */
  public String getRealFileName(){
    return (realFileName == null) ? realFileName=generateRandomUUID(this.data,"") : realFileName;
  }
  
  private String generateRandomUUID(MultipartFile file, String prefix){
       return prefix + UUID.randomUUID() + "."  +  FilenameUtils.getExtension(file.getOriginalFilename());
  }

  }
  
  public void saveFile(File destination) {
    //check if file has been saved already, if so return 
    //newfile = getRealFileName
    //copy this.data to newfile 
    //on anyproblem throw expection.
  }

}

AttachmentController.java

package somepackagename.here;

import java.io.IOException;
import java.util.Date;
import java.util.HashMap;

import javax.servlet.http.HttpServletResponse;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
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.bind.annotation.ResponseStatus;
import org.springframework.web.multipart.MultipartFile;

/**
 * api controller for user info . basic info and paging garden
 * 
 * @author oaktree
 *
 */
@Controller
@RequestMapping(value = "api/social/observation")
public class AttachmentController {
  private static final Logger LOGGER = LogManager.getLogger(AttachmentController.class);


  /**
   * update observation domain
   * 
   * @param file
   * @param id
   * @return the id of the image in system.
   * @throws BadCategoryNameException
   */
  @RequestMapping(value = "{id}/add/attachment", method = RequestMethod.POST)
  @ResponseBody
  @ResponseStatus(value = HttpStatus.NO_CONTENT)
  public void addAttachment(@PathVariable("id") Long id, @RequestParam("file") MultipartFile attachment)
      throws BadCategoryNameException {

    modle.createAttachment(id, attachment);

  }



}

spring-upload.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	   		http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
	   		http://www.springframework.org/schema/context
	   		http://www.springframework.org/schema/context/spring-context-3.1.xsd
			http://www.springframework.org/schema/mvc 
			http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">



	<!-- Configure the multipart resolver -->
	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver"
		p:maxUploadSize="1500000" />

	
</beans>