1. 从请求中获取MultipartFile
@RequestMapping(value="/upload", method=RequestMethod.POST)public @ResponseBody String handleFileUpload( @RequestParam("file") MultipartFile file) throws IOException{
2. 文件流处理
import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import mons.fileupload.util.Streams;import mons.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";}}
