上传图片文件到ftp服务器

效果图 :

注 : ftp服务器的搭建及创建账号请自行百度 , 这里主要介绍图片上传的实现

图片上传工具类 :

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;public class FtpUtil {/**  * Description: 向FTP服务器上传文件  * @param host FTP服务器hostname  * @param port FTP服务器端口  * @param username FTP登录账号  * @param password FTP登录密码  * @param basePath FTP服务器基础目录 * @param filePath FTP服务器文件存放路径。例如分日期存放：/2017/12/12。文件的路径为basePath+filePath * @param filename 上传到FTP服务器上的文件名  * @param input 输入流  * @return 成功返回true，否则返回false  */    public static boolean uploadFile(String host, int port, String username, String password, String basePath,  String filePath, String filename, InputStream input) {  boolean result = false;  FTPClient ftp = new FTPClient();  ftp.setControlEncoding("UTF-8");try {  int reply;  ftp.connect(host, port);// 连接FTP服务器  // 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器  ftp.login(username, password);// 登录  reply = ftp.getReplyCode();  if (!FTPReply.isPositiveCompletion(reply)) {  ftp.disconnect();  return result;  }  //切换到上传目录  if (!ftp.changeWorkingDirectory(basePath+filePath)) {  //如果目录不存在创建目录  String[] dirs = filePath.split("/");  String tempPath = basePath;  for (String dir : dirs) {  if (null == dir || "".equals(dir)) continue;  tempPath += "/" + dir;  if (!ftp.changeWorkingDirectory(tempPath)) {  if (!ftp.makeDirectory(new String(tempPath.getBytes("UTF-8"),"iso-8859-1"))) {  return result;  } else {  ftp.changeWorkingDirectory(tempPath);  }  }  }  }  //设置上传文件的类型为二进制类型  ftp.setFileType(FTP.BINARY_FILE_TYPE);  //上传文件  ftp.enterLocalPassiveMode();if (!ftp.storeFile(filename, input)) {return result;  }  input.close();  ftp.logout();  result = true;  } catch (IOException e) {  e.printStackTrace();  } finally {  if (ftp.isConnected()) {  try {  ftp.disconnect();  } catch (IOException ioe) {  }  }  }  return result;  }

在service层内创建接口及接口实现类

public interface PictureService {Map uploadPicture(MultipartFile uploadFile);}

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;import com.demo.service.PictureService;
import com.demo.util.FtpUtil;
import com.demo.util.IDUtil;
@Service
public class PictureServiceImpl implements PictureService {  //获取ip地址  private static final String FTP_ADDRESS = "填写自己服务器的外网ip地址";  //端口号  private static final int FTP_PORT = 21; //用户名  private static final String FTP_USERNAME = "ftp服务器账号";  //密码  private static final String FTP_PASSWORD = "密码";  //基本路径  private static final String FTP_BASEPATH = "\\";  //下载地址的基础url  private static final String IMAGE_BASE_URL = "http://ip地址/ftp";  @Override  public Map uploadPicture(MultipartFile uploadFile) {  Map map = new HashMap(); try {  // 生成一个文件名  // 获取旧的名字  String oldName = uploadFile.getOriginalFilename();  String newName = IDUtil.genImageName();  //新名字  newName = newName + oldName.substring(oldName.lastIndexOf("."));//上传的路径  SimpleDateFormat df = new SimpleDateFormat("/yyyy/MM/dd/"); //以日期创建文件夹利于管理String imagePath = df.format(new Date());    //当前系统时间保证文件名不重复String ftp = "ftp://";String url = ftp + FTP_ADDRESS + imagePath + newName;System.out.println("图片访问路径 : " + url);//端口号int port = FTP_PORT; //调用方法，上传文件  boolean result = FtpUtil.uploadFile(FTP_ADDRESS, port,  FTP_USERNAME, FTP_PASSWORD, FTP_BASEPATH, imagePath,  newName, uploadFile.getInputStream());  //判断是否上传成功  if (!result) {  map.put("code", 0);map.put("msg", "上传失败");return map;  }  map.put("code", 1);map.put("msg", "上传成功");map.put("url", url);return map;   } catch (IOException e) { map.put("code", 0);map.put("msg", "上传失败");return map; }  }  
}  

实际调用 :

	@RequestMapping(value = "insert_detail")public String insert_detail(@RequestParam(value = "file", required = false) MultipartFile file,@RequestParam(value = "productOne", required = false) MultipartFile productOne,@RequestParam(value = "productTwo", required = false) MultipartFile productTwo,@RequestParam(value = "productThree", required = false) MultipartFile productThree,@RequestParam(value = "productFour", required = false) MultipartFile productFour,@RequestParam(value = "productFive", required = false) MultipartFile productFive,@RequestParam(value = "productSix", required = false) MultipartFile productSix,ShopDetail shopdetail) {Login user = (Login) request.getSession().getAttribute("user");String createCode = String.valueOf(user.getId());String createName = user.getRealname();//控制流程可以忽略 根据自己的业务来编写if(!file.isEmpty()){Map map = pictureService.uploadPicture(file);String ftpPath = (String) map.get("url");String posPath = ftpPath.substring(20);String url = FRONTPATH + posPath;shopdetail.setUrl(url);}if (!productOne.isEmpty()) {Map map = pictureService.uploadPicture(productOne);String ftpPath = (String) map.get("url");String posPath = ftpPath.substring(20);String url = FRONTPATH + posPath;shopdetail.setProduct1(url);}if (!productTwo.isEmpty()) {Map map = pictureService.uploadPicture(productTwo);String ftpPath = (String) map.get("url");String posPath = ftpPath.substring(20);String url = FRONTPATH + posPath;shopdetail.setProduct2(url);}if (!productThree.isEmpty()) {Map map = pictureService.uploadPicture(productThree);String ftpPath = (String) map.get("url");String posPath = ftpPath.substring(20);String url = FRONTPATH + posPath;shopdetail.setProduct3(url);}if (!productFour.isEmpty()) {Map map = pictureService.uploadPicture(productFour);String ftpPath = (String) map.get("url");String posPath = ftpPath.substring(20);String url = FRONTPATH + posPath;shopdetail.setProduct4(url);}if (!productFive.isEmpty()) {Map map = pictureService.uploadPicture(productFive);String ftpPath = (String) map.get("url");String posPath = ftpPath.substring(20);String url = FRONTPATH + posPath;shopdetail.setProduct5(url);}if (!productSix.isEmpty()) {Map map = pictureService.uploadPicture(productSix);String ftpPath = (String) map.get("url");String posPath = ftpPath.substring(20);String url = FRONTPATH + posPath;shopdetail.setProduct6(url);}shopdetail.setCreateCode(createCode);shopdetail.setCreateName(createName);sdService.addShopDetail(shopdetail);System.out.println("图片上传成功");return "redirect:query_detail";}

可以看到文件夹是以日期年月日进行分类 , 管理起来非常方便 , 到此图片上传已经可以实现 , 以我个人为例 , 我ftp资源存放目录设置的是项目工程目录 , 当重新发布的时候会导致之前上传的图片被清空 , 需要提前备份好ftp上传的图片资源复制到准备重新发布的项目目录中 , 再进行发布 , 以免资源丢失造成不必要的麻烦

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