private void savePic(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 = new byte[1024];            // 读取到的数据长度            int len;            // 输出的文件流保存到本地文件            File tempFile = new File(path);            if (!tempFile.exists()) {                tempFile.mkdirs();            }            os = new FileOutputStream(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();            }        }    }

文件保存方法.

 

 

附：

package com.ebways.web.upload.controller;import java.io.*;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;import com.ebways.web.base.BaseController;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import com.ebways.web.upload.url.UploadURL;import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;@Controller@RequestMapping(value = UploadURL.MODE_NAME)public class UploadController extends BaseController {    @RequestMapping(value = UploadURL.IMAGE_UPLOAD)    @ResponseBody    public String uploadFile(MultipartFile file, HttpServletRequest request, HttpServletResponse response) throws IllegalArgumentException, Exception {        // 参数列表        Map
     
       map = new HashMap<>();        map.put("file", file);        savePic(file.getInputStream(), file.getOriginalFilename());        //请求接口        String apiReturnStr = "";//apiHttpRequest(map, API_HOST_URL + "/image/upload");        return apiReturnStr;    }    private void savePic(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 = new byte[1024];            // 读取到的数据长度            int len;            // 输出的文件流保存到本地文件            File tempFile = new File(path);            if (!tempFile.exists()) {                tempFile.mkdirs();            }            os = new FileOutputStream(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     */    private String allowSuffix = "jpg,png,gif,jpeg";//允许文件格式    private long allowSize = 2L;//允许文件大小    private String fileName;    private String[] fileNames;    public String getAllowSuffix() {        return allowSuffix;    }    public void setAllowSuffix(String allowSuffix) {        this.allowSuffix = allowSuffix;    }    public long getAllowSize() {        return allowSize * 1024 * 1024;    }    public void setAllowSize(long allowSize) {        this.allowSize = allowSize;    }    public String getFileName() {        return fileName;    }    public void setFileName(String fileName) {        this.fileName = fileName;    }    public String[] getFileNames() {        return fileNames;    }    public void setFileNames(String[] fileNames) {        this.fileNames = fileNames;    }    /**     * 
      
     * 功能：重新命名文件     * 
     *     * @return     * @author wangsheng     * @date 2016年9月8日     */    private String getFileNameNew() {        SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmssSSS");        return fmt.format(new Date());    }    /**     * 
      
     * 功能：文件上传     * 
     *     * @param files     * @param destDir     * @throws Exception     * @author wangsheng     * @date 2014年9月25日     */    public void uploads(MultipartFile[] files, String destDir, HttpServletRequest request) throws Exception {        String path = request.getContextPath();        String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path;        try {            fileNames = new String[files.length];            int index = 0;            for (MultipartFile file : files) {                String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);                int length = getAllowSuffix().indexOf(suffix);                if (length == -1) {                    throw new Exception("请上传允许格式的文件");                }                if (file.getSize() > getAllowSize()) {                    throw new Exception("您上传的文件大小已经超出范围");                }                String realPath = request.getSession().getServletContext().getRealPath("/");                File destFile = new File(realPath + destDir);                if (!destFile.exists()) {                    destFile.mkdirs();                }                String fileNameNew = getFileNameNew() + "." + suffix;//                File f = new File(destFile.getAbsoluteFile() + "\\" + fileNameNew);                file.transferTo(f);                f.createNewFile();                fileNames[index++] = basePath + destDir + fileNameNew;            }        } catch (Exception e) {            throw e;        }    }    /**     * 
      
     * 功能：文件上传     * 
     *     * @param file     * @param destDir     * @throws Exception     * @author wangsheng     * @date 2016年9月8日     */    public void upload(MultipartFile file, String destDir, HttpServletRequest request) throws Exception {        String path = request.getContextPath();        String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path;        try {            String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);            int length = getAllowSuffix().indexOf(suffix);            if (length == -1) {                throw new Exception("请上传允许格式的文件");            }            if (file.getSize() > getAllowSize()) {                throw new Exception("您上传的文件大小已经超出范围");            }            String realPath = request.getSession().getServletContext().getRealPath("/");            File destFile = new File(realPath + destDir);            if (!destFile.exists()) {                destFile.mkdirs();            }            String fileNameNew = getFileNameNew() + "." + suffix;            File f = new File(destFile.getAbsoluteFile() + "/" + fileNameNew);            file.transferTo(f);            f.createNewFile();            fileName = basePath + destDir + fileNameNew;        } catch (Exception e) {            throw e;        }    }}