java 文件保存到本地

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;
        }
    }

/**
     * <p class="detail">
     * 功能：文件上传
     * </p>
     *
     * @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;
        }
    }

}