@RequestMapping(value="/upload", method=RequestMethod.POST)

    public @ResponseBody String handleFileUpload(

            @RequestParam("file") MultipartFile file

            ) throws IOException{

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import org.apache.commons.fileupload.util.Streams;

import org.apache.commons.io.IOUtils;

import org.springframework.web.multipart.MultipartFile;

public class UploadFileUtil {

    /**

     * 使用相同的名称

     * @param file

     * @param filePath

     * @return

     */

    public static String handleFileUpload(MultipartFile file,String filePath){

        try {

            if(!file.isEmpty()){

                String name=file.getOriginalFilename();

                InputStream inpustream=file.getInputStream();

                FileOutputStream fos = new FileOutputStream(filePath+File.separator+name);

                Streams.copy(inpustream, fos, true);

            }else{

                return "can not upload this file,because it is empty!";

            }

        } catch (IOException e) {

            return "failed to upload this file,because Stream interrupt unexpectedly";

        }

        return "upload file sucess";

    }

    /**

     * 重命名文件，包含后缀

     * @param file

     * @param filePath

     * @param fileName

     * @return

     */

    public static String handleFileUpload(MultipartFile file,String filePath,String fileName){

        try {

            if(!file.isEmpty()){

                InputStream inpustream=file.getInputStream();

                FileOutputStream fos = new FileOutputStream(filePath+File.separator+fileName);

                Streams.copy(inpustream, fos, true);

            }else{

                return "can not upload this file,because it is empty!";

            }

        } catch (IOException e) {

            return "failed to upload this file,because Stream interrupt unexpectedly";

        }

        return "upload file sucess";

    }

    /**

     *Copy bytes from a large (over 2GB) file with same filename

     * @param file

     * @param filePath

     * @param fileName

     * @return

     */

    public static String handleLargeFileUpload(MultipartFile file,String filePath){

        try {

            if(!file.isEmpty()){

                String name=file.getOriginalFilename();

                InputStream inpustream=file.getInputStream();

                FileOutputStream fos = new FileOutputStream(filePath+File.separator+name);

                IOUtils.copyLarge(inpustream, fos);

                if(inpustream!=null){

                    inpustream.close();

                }

                if(fos!=null){

                    fos.close();

                }

            }else{

                return "can not upload this file,because it is empty!";

            }

        } catch (IOException e) {

            return "failed to upload this file,because Stream interrupt unexpectedly";

        }

        return "upload file sucess";

    }

    /**

     *Copy bytes from a large (over 2GB) file with rename file

     * @param file

     * @param filePath

     * @param fileName

     * @return

     */

    public static String handleLargeFileUpload(MultipartFile file,String filePath,String fileName){

        try {

            if(!file.isEmpty()){

                InputStream inpustream=file.getInputStream();

                FileOutputStream fos = new FileOutputStream(filePath+File.separator+fileName);

                IOUtils.copyLarge(inpustream, fos);

                if(inpustream!=null){

                    inpustream.close();

                }

                if(fos!=null){

                    fos.close();

                }

            }else{

                return "can not upload this file,because it is empty!";

            }

        } catch (IOException e) {

            return "failed to upload this file,because Stream interrupt unexpectedly";

        }

        return "upload file sucess";

    }

}