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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 {    /**     * 使用相同的名稱     * @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，包含后綴     * @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";    }}