java实现文件保存到本地的方法

privatevoidsavePic(InputStream inputStream, String fileName) {

    OutputStream os =null;

    try{

      String path ="D:\\testFile\\";

      // 2、保存到临时文件

      // 1K的数据缓冲

      byte[] bs =newbyte[1024];

      // 读取到的数据长度

      intlen;

      // 输出的文件流保存到本地文件

      File tempFile =newFile(path);

      if(!tempFile.exists()) {

        tempFile.mkdirs();

      }

      os =newFileOutputStream(tempFile.getPath() + File.separator + fileName);

      // 开始读取

      while((len = inputStream.read(bs)) != -1) {

        os.write(bs,0, len);

      }

    }catch(IOException e) {

      e.printStackTrace();

    }catch(Exception e) {

      e.printStackTrace();

    }finally{

      // 完毕，关闭所有链接

      try{

        os.close();

        inputStream.close();

      }catch(IOException e) {

        e.printStackTrace();

      }

    }

  }

packagecom.ebways.web.upload.controller;

importjava.io.*;

importjava.text.SimpleDateFormat;

importjava.util.Date;

importjava.util.HashMap;

importjava.util.Map;

importcom.ebways.web.base.BaseController;

importorg.springframework.stereotype.Controller;

importorg.springframework.web.bind.annotation.RequestMapping;

importorg.springframework.web.bind.annotation.RequestParam;

importorg.springframework.web.bind.annotation.ResponseBody;

importcom.ebways.web.upload.url.UploadURL;

importorg.springframework.web.multipart.MultipartFile;

importjavax.servlet.http.HttpServletRequest;

importjavax.servlet.http.HttpServletResponse;

@Controller

@RequestMapping(value = UploadURL.MODE_NAME)

publicclassUploadControllerextendsBaseController {

  @RequestMapping(value = UploadURL.IMAGE_UPLOAD)

  @ResponseBody

  publicString uploadFile(MultipartFile file, HttpServletRequest request, HttpServletResponse response)throwsIllegalArgumentException, Exception {

    // 参数列表

    Mapmap =newHashMap<>();

    map.put("file", file);

    savePic(file.getInputStream(), file.getOriginalFilename());

    //请求接口

    String apiReturnStr ="";//apiHttpRequest(map, API_HOST_URL + "/image/upload");

    returnapiReturnStr;

  }

  privatevoidsavePic(InputStream inputStream, String fileName) {

    OutputStream os =null;

    try{

      String path ="D:\\testFile\\";

      // 2、保存到临时文件

      // 1K的数据缓冲

      byte[] bs =newbyte[1024];

      // 读取到的数据长度

      intlen;

      // 输出的文件流保存到本地文件

      File tempFile =newFile(path);

      if(!tempFile.exists()) {

        tempFile.mkdirs();

      }

      os =newFileOutputStream(tempFile.getPath() + File.separator + fileName);

      // 开始读取

      while((len = inputStream.read(bs)) != -1) {

        os.write(bs,0, len);

      }

    }catch(IOException e) {

      e.printStackTrace();

    }catch(Exception e) {

      e.printStackTrace();

    }finally{

      // 完毕，关闭所有链接

      try{

        os.close();

        inputStream.close();

      }catch(IOException e) {

        e.printStackTrace();

      }

    }

  }

  /**

   *

   * 功能：公共Action

   *

   *

   * @date 2016年9月8日

   * @author wangsheng

   */

  privateString allowSuffix ="jpg,png,gif,jpeg";//允许文件格式

  privatelongallowSize = 2L;//允许文件大小

  privateString fileName;

  privateString[] fileNames;

  publicString getAllowSuffix() {

    returnallowSuffix;

  }

  publicvoidsetAllowSuffix(String allowSuffix) {

    this.allowSuffix = allowSuffix;

  }

  publiclonggetAllowSize() {

    returnallowSize *1024*1024;

  }

  publicvoidsetAllowSize(longallowSize) {

    this.allowSize = allowSize;

  }

  publicString getFileName() {

    returnfileName;

  }

  publicvoidsetFileName(String fileName) {

    this.fileName = fileName;

  }

  publicString[] getFileNames() {

    returnfileNames;

  }

  publicvoidsetFileNames(String[] fileNames) {

    this.fileNames = fileNames;

  }

  /**

   *

   * 功能：重新命名文件

   *

   *

   * @return

   * @author wangsheng

   * @date 2016年9月8日

   */

  privateString getFileNameNew() {

    SimpleDateFormat fmt =newSimpleDateFormat("yyyyMMddHHmmssSSS");

    returnfmt.format(newDate());

  }

  /**

   *

   * 功能：文件上传

   *

   *

   * @param files

   * @param destDir

   * @throws Exception

   * @author wangsheng

   * @date 2014年9月25日

   */

  publicvoiduploads(MultipartFile[] files, String destDir, HttpServletRequest request)throwsException {

    String path = request.getContextPath();

    String basePath = request.getScheme() +"://"+ request.getServerName() +":"+ request.getServerPort() + path;

    try{

      fileNames =newString[files.length];

      intindex =0;

      for(MultipartFile file : files) {

        String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") +1);

        intlength = getAllowSuffix().indexOf(suffix);

        if(length == -1) {

          thrownewException("请上传允许格式的文件");

        }

        if(file.getSize() > getAllowSize()) {

          thrownewException("您上传的文件大小已经超出范围");

        }

        String realPath = request.getSession().getServletContext().getRealPath("/");

        File destFile =newFile(realPath + destDir);

        if(!destFile.exists()) {

          destFile.mkdirs();

        }

        String fileNameNew = getFileNameNew() +"."+ suffix;//

        File f =newFile(destFile.getAbsoluteFile() +"\\"+ fileNameNew);

        file.transferTo(f);

        f.createNewFile();

        fileNames[index++] = basePath + destDir + fileNameNew;

      }

    }catch(Exception e) {

      throwe;

    }

  }

  /**

   *功能：文件上传

   *

   * @param file

   * @param destDir

   * @throws Exception

   * @author wangsheng

   * @date 2016年9月8日

   */

  publicvoidupload(MultipartFile file, String destDir, HttpServletRequest request)throwsException {

    String path = request.getContextPath();

    String basePath = request.getScheme() +"://"+ request.getServerName() +":"+ request.getServerPort() + path;

    try{

      String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") +1);

      intlength = getAllowSuffix().indexOf(suffix);

      if(length == -1) {

        thrownewException("请上传允许格式的文件");

      }

      if(file.getSize() > getAllowSize()) {

        thrownewException("您上传的文件大小已经超出范围");

      }

      String realPath = request.getSession().getServletContext().getRealPath("/");

      File destFile =newFile(realPath + destDir);

      if(!destFile.exists()) {

        destFile.mkdirs();

      }

      String fileNameNew = getFileNameNew() +"."+ suffix;

      File f =newFile(destFile.getAbsoluteFile() +"/"+ fileNameNew);

      file.transferTo(f);

      f.createNewFile();

      fileName = basePath + destDir + fileNameNew;

    }catch(Exception e) {

      throwe;

    }

  }

}