本篇介绍了java实现文件保存到本地的方法，具体代码如下：

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<String, Object> 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(); } } } /** * <p class="detail"> * 功能：公共Action * </p> * * @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; } /** * <p class="detail"> * 功能：重新命名文件 * </p> * * @return * @author wangsheng * @date 2016年9月8日 */ private String getFileNameNew() { SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmssSSS"); return fmt.format(new Date()); } /** * <p class="detail"> * 功能：文件上传 * </p> * * @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; } }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。