springmvc文件上傳 參數為MultipartFile 轉換為File

package cn.com.mcd.controller;
import java.io.File;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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;

import cn.com.mcd.common.ResultModel;
import cn.com.mcd.model.FileMain;
import cn.com.mcd.service.CustemerListService;
import cn.com.mcd.util.UtilDateTime;
import cn.com.mcd.util.UtilExcelToTxt;
import cn.com.mcd.util.constans.Constants;
import cn.com.mcd.util.constans.ConstantsError;
import jxl.read.biff.BiffException;
/**
* @author soya.song
* 2017.3.16
*/
@Controller
@RequestMapping("/custemerList")
@SuppressWarnings("unused")
public class CustemerListController implements Serializable{
private static final long serialVersionUID = 2732216546553695880L;
private static final Logger log = LoggerFactory.getLogger(CustemerListController.class);
@Resource
private CustemerListService custemerListService;
static String prefix="customer_";
static String suffixTo=".txt";

/**
* 導入
* @param id
* @return
*/
@RequestMapping(value = "/uploadCustList",method = RequestMethod.POST)
@ResponseBody
public ResultModel uploadCustList(@RequestParam MultipartFile[] myfiles, HttpServletRequest request) throws IOException {
ResultModel resultModel=new ResultModel();
Map<String,Object> resultMap=new HashMap<String,Object>();
FileMain file=new FileMain();
log.info(this.getClass().getName()+".uploadCustList.start");
ResultModel result=new ResultModel();
String originalFilename="";//上傳的文件的文件名

//校驗上傳文件上否為空
if(null==myfiles || myfiles.length<=0){
result.setResultMsg(Constants.SERVICE_ERROR_CODE);
result.setResultMsg(Constants.FILE_NULL_ERROR);
return result;
}
List<FileMain> resultList=new ArrayList<FileMain>();
int i=1;
for (MultipartFile myfile : myfiles) {
if (!myfile.isEmpty()) {
//獲得文件后綴名
String suffix = myfile.getOriginalFilename().substring(myfile.getOriginalFilename().lastIndexOf("."));
//檢查文件格式是否正確
if(!".lsx".equals(suffix) && !".xlsx".equals(suffix) ){
resultModel.setResultCode(ConstantsError.CHECK_EXCEL_NOT_EXIST_CODE);//cus1002
resultModel.setResultMsg(ConstantsError.CHECK_EXCEL_NOT_EXIST_MSG);//the file must be excel
return resultModel;
}

//獲得文件源名
originalFilename=myfile.getOriginalFilename();

//轉為File
String path=request.getSession().getServletContext().getRealPath("/file/upload/");//生成一個目錄
String uuid=prefix+UtilDateTime.nowDateToString();//customer_YYYYMMDDHHMM
String fileName = uuid+ suffix; //文件全路徑
String txtName = uuid+ suffixTo; //txt文件名（customer_YYYYMMDDHHMM.txt(時間為24小時制)）
File f=new File(path,fileName);


//如果path路徑不存在，創建一個文件夾
if(!f.exists()){
f.mkdirs();
}
try {
myfile.transferTo(f);//沒有這句話，生成的文件就是一個文件夾。有了以后，就會在path路徑下，生成一個文件
//1.將文件信息保存到數據庫
Map<String,Object> map=custemerListService.saveExcel(f);
// String flg=(String) map.get("flag") ;
// if(!"0".equals(flg)){//說明保存數據庫沒有成功
// if("1".equals(flg)){//說明校驗失敗
// result.setResultData(map);
// }
// result.setResultCode(Constants.SERVICE_ERROR_CODE);//500
// result.setResultMsg(Constants.FILE_CHECK_ERROR);//導入文件數據有誤
// log.info(this.getClass().getName()+".uploadCustList.文件上傳保存到數據庫校驗失敗result："+result);
// return result;
// }
//2.將excel文件轉換為txt文件
// UtilExcelToTxt xt = UtilExcelToTxt.getInstance();
// resultMap=xt.excelToTxt(path+fileName, path,txtName);

//custemerListService
//將txt文件傳入sftp


//如果導入成功一個文件，記錄一次
file.setFlag("successful");//成功
//如果導入成功一個文件，記錄一次
} catch (IllegalStateException | IOException e) {
file.setFlag("failure");//成功
log.error(this.getClass().getName()+".uploadCustList.end.上傳excel文件controller報錯",e);
// throw new DataBaseAccessException(5001+Constants.FILE_UPLOAD_ERROR+e);//excel文件導入失敗
}
//如果導入成功一個文件，記錄一次
file.setName(fileName);
file.setNum(i);
resultList.add(file);//對象裝入list
i++;
}
}
result.setResultData(resultList);
return result;
}
}