一、引入依赖
<!-- https://mvnrepository.com/artifact/commons-net/commons-net -->
<dependency>
<groupId>commons-net</groupId>
<artifactId>commons-net</artifactId>
<version>3.9.0</version>
</dependency>
<!-- hutool -->
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.7.22</version>
</dependency>Tip：使用commons–net 3.9.0版本，之前的版本有漏洞
二、配置文件
ftp:
basePath: /
host: 192.168.1.100
httpPath: ftp://192.168.1.100
password: demo
port: 21
username: demo配置文件类：
package com.example.demo.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
/**
* @Author: meng
* @Description: ftp配置
* @Date: 2023/6/30 13:44
* @Version: 1.0
*/
@Data
@Component
@ConfigurationProperties(prefix = "ftp")
public class FtpProperties {
/**
* ftp服务器的地址
*/
private String host;
/**
* ftp服务器的端口号（连接端口号）
*/
private String port;
/**
* ftp的用户名
*/
private String username;
/**
* ftp的密码
*/
private String password;
/**
* ftp上传的根目录
*/
private String basePath;
/**
* 回显地址
*/
private String httpPath;
}
三、Controller层
Tip：Response为通用返回类，不熟悉的可以看这篇文章：Springboot – 通用返回类BaseResults_W_Meng_H的博客-CSDN博客BaseResults类public class BaseResults { private Integer code; private String message; private T data; public BaseResults() { super(); } public BaseResu…https://blog.csdn.net/W_Meng_H/article/details/104995823
package com.example.demo.controller;
import com.example.demo.service.FtpService;
import com.template.common.core.data.Response;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @Author: meng
* @Description: 文件服务
* @Date: 2023/6/30 14:33
* @Version: 1.0
*/
@RestController
@RequestMapping("/file")
public class FileController {
@Autowired
private FtpService ftpService;
// 单上传文件
@PostMapping(value = "upload", consumes = "multipart/*", headers = "content-type=multipart/form-data")
public Response uploadFile(@RequestParam("file") MultipartFile file, HttpServletRequest request) {
return ftpService.uploadMultipartFile(file, request);
}
// 导出文件
@GetMapping(value = "download")
public void downloadFile(@RequestParam String fileName, @RequestParam String ftpFilePath, HttpServletResponse response) {
ftpService.downloadFileToFtp(fileName, ftpFilePath, response);
}
// 删除文件
@GetMapping(value = "delete")
public Response deleteFile(@RequestParam String ftpFilePath) {
return ftpService.deleteFileToFtp(ftpFilePath);
}
}
四、Service层
package com.example.demo.service;
import com.template.common.core.data.Response;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @Author: meng
* @Description: ftp服务类
* @Date: 2023/6/30 13:46
* @Version: 1.0
*/
public interface FtpService {
/**
* 上传文件到ftp
* @param multipartFile
* @param request
* @return
*/
public Response uploadMultipartFile(MultipartFile multipartFile, HttpServletRequest request);
/**
* 下载ftp文件，直接转到输出流
* @param fileName
* @param ftpFilePath
* @param response
*/
public void downloadFileToFtp(String fileName, String ftpFilePath, HttpServletResponse response);
/**
* 删除ftp文件
* @param ftpFilePath ftp下文件路径，根目录开始
* @return
*/
Response deleteFileToFtp(String ftpFilePath);
}
实现类：
package com.example.demo.service.impl;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.IdUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.example.demo.config.FtpProperties;
import com.example.demo.service.FtpService;
import com.example.demo.tools.FileUtils;
import com.template.common.core.data.Response;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.Date;
/**
* @Author: meng
* @Description: ftp服务类
* @Date: 2023/6/30 13:47
* @Version: 1.0
*/
@Service
public class FtpServiceImpl implements FtpService {
private Logger logger = LoggerFactory.getLogger(this.getClass());
@Autowired
private FtpProperties ftpProperties;
// 方式一
@Override
public Response uploadMultipartFile(MultipartFile multipartFile, HttpServletRequest request) {
if (multipartFile == null || multipartFile.isEmpty()) {
return Response.error("没有上传文件");
}
//1、获取原文件后缀名
String originalFileName = multipartFile.getOriginalFilename();
String suffix = originalFileName.substring(originalFileName.lastIndexOf('.'));
//2、使用UUID生成新文件名
String newFileName = IdUtil.fastSimpleUUID();
//3、将MultipartFile转化为File
File file = null;
try {
// file = FileUtils.multipartFileToFile(multipartFile);
flag = uploadFileToFtp(multipartFile.getInputStream(), newFileName + suffix, today, ftpClient);
} catch (Exception e) {
logger.error("文件上传失败:", e);
return Response.error("文件上传失败");
}
if (ObjectUtil.isNull(file)) {
return Response.error("文件上传失败");
}
//当前日期字符串
String today = File.separator + DateUtil.format(new Date(), "yyyyMMdd");
Boolean flag = uploadFileToFtp(file, newFileName + suffix, today);
if (!flag) {
return Response.error("文件上传失败");
}
System.out.println(file.toURI());
File f = new File(file.toURI());
f.delete();
String filePath = ftpProperties.getHttpPath() + today + File.separator + newFileName + suffix;
return Response.success(filePath);
}
// 方式二
public Response uploadMultipartFile2(MultipartFile multipartFile, HttpServletRequest request) {
FTPClient ftpClient = connectFtpServer();
if (multipartFile == null || multipartFile.isEmpty()) {
return R.error(Constants.FILE_EMPTY);
}
//获取原文件后缀名
String originalFileName = multipartFile.getOriginalFilename();
String suffix = originalFileName.substring(originalFileName.lastIndexOf('.'));
//使用UUID生成新文件名
String newFileName = IdUtil.fastSimpleUUID();
//当前日期字符串
String today = separator + DateUtil.date().toString(DATE_FORMAT);
Boolean flag = false;
try {
flag = uploadFileToFtp(multipartFile.getInputStream(), newFileName + suffix, today, ftpClient);
} catch (Exception e) {
logger.error("文件上传失败:", e);
}
if (!flag) {
logger.info("文件上传失败");
return R.error("文件上传失败");
}
String filePath = ftpProperties.getHttpPath() + today + File.separator + newFileName + suffix;
return Response.success(filePath);
}
public Boolean uploadFileToFtp(File file, String fileName, String filePath) {
logger.info("调用文件上传接口");
// 定义保存结果
boolean iaOk = false;
// 初始化连接
FTPClient ftp = connectFtpServer();
if (ftp != null) {
try {
// 设置文件传输模式为二进制，可以保证传输的内容不会被改变
ftp.setFileType(FTP.BINARY_FILE_TYPE);
ftp.enterLocalPassiveMode(); //注：上传文件都为0字节，设置为被动模式即可
// 跳转到指定路径，逐级跳转，不存在的话就创建再进入
toPathOrCreateDir(ftp, filePath);
InputStream inputStream = new FileInputStream(file);
// 上传文件 参数：上传后的文件名，输入流,,返回Boolean类型，上传成功返回true
iaOk = ftp.storeFile(fileName, inputStream);
// 关闭输入流
inputStream.close();
// 退出ftp
ftp.logout();
} catch (IOException e) {
logger.error(e.toString());
} finally {
if (ftp.isConnected()) {
try {
// 断开ftp的连接
ftp.disconnect();
} catch (IOException ioe) {
logger.error(ioe.toString());
}
}
}
}
return iaOk;
}
@Override
public void downloadFileToFtp(String fileName, String ftpFilePath, HttpServletResponse response) {
FTPClient ftpClient = connectFtpServer();
try {
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpClient.enterLocalPassiveMode();
// 设置文件ContentType类型，这样设置，会自动判断下载文件类型
response.setContentType("application/x-msdownload");
// 设置文件头：最后一个参数是设置下载的文件名并编码为UTF-8
response.setHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(fileName, "UTF-8"));
InputStream is = ftpClient.retrieveFileStream(ftpFilePath);
BufferedInputStream bis = new BufferedInputStream(is);
OutputStream out = response.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
while ((len = bis.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.flush();
out.close();
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
ftpClient.logout();
} catch (Exception e) {
logger.error("FTP文件下载失败:", e);
} finally {
if (ftpClient.isConnected()) {
try {
ftpClient.disconnect();
} catch (IOException ioe) {
logger.error(ioe.toString());
}
}
}
}
@Override
public Response deleteFileToFtp(String ftpFilePath) {
FTPClient ftp = connectFtpServer();
boolean resu = false;
try {
resu = ftp.deleteFile(ftpFilePath);
ftp.logout();
} catch (Exception e) {
logger.error("FTP文件删除失败:{}", e);
return Response.error("文件删除失败");
} finally {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException ioe) {
logger.error(ioe.toString());
}
}
}
return Response.SUCCESS;
}
private FTPClient connectFtpServer() {
// 创建FTPClient对象（对于连接ftp服务器，以及上传和上传都必须要用到一个对象）
logger.info("创建FTP连接");
FTPClient ftpClient = new FTPClient();
// 设置连接超时时间
ftpClient.setConnectTimeout(1000 * 60);
// 设置ftp字符集
ftpClient.setControlEncoding("utf-8");
// 设置被动模式，文件传输端口设置,否则文件上传不成功，也不报错
ftpClient.enterLocalPassiveMode();
try {
// 定义返回的状态码
int replyCode;
// 连接ftp(当前项目所部署的服务器和ftp服务器之间可以相互通讯，表示连接成功)
ftpClient.connect(ftpProperties.getHost());
// 输入账号和密码进行登录
ftpClient.login(ftpProperties.getUsername(), ftpProperties.getPassword());
// 接受状态码(如果成功，返回230，如果失败返回503)
replyCode = ftpClient.getReplyCode();
// 根据状态码检测ftp的连接，调用isPositiveCompletion(reply)-->如果连接成功返回true，否则返回false
if (!FTPReply.isPositiveCompletion(replyCode)) {
logger.info("connect ftp {} failed", ftpProperties.getHost());
// 连接失败，断开连接
ftpClient.disconnect();
return null;
}
logger.info("replyCode:" + replyCode);
} catch (IOException e) {
logger.error("connect fail:" + e.toString());
return null;
}
return ftpClient;
}
private void toPathOrCreateDir(FTPClient ftp, String filePath) throws IOException {
String[] dirs = filePath.split("/");
for (String dir : dirs) {
if (StrUtil.isBlank(dir)) {
continue;
}
if (!ftp.changeWorkingDirectory(dir)) {
ftp.makeDirectory(dir);
ftp.changeWorkingDirectory(dir);
}
}
}
}五、相关工具类
package com.example.demo.tools;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
/**
* @Author: meng
* @Description: 文件转换工具类
* @Date: 2023/6/30 14:13
* @Version: 1.0
*/
public class FileUtils {
/**
* MultipartFile 转 File
* @param file
* @throws Exception
*/
public static File multipartFileToFile(MultipartFile file) throws Exception {
File toFile = null;
if(file.equals("")||file.getSize()<=0){
file = null;
}else {
InputStream ins = null;
ins = file.getInputStream();
toFile = new File(file.getOriginalFilename());
toFile = inputStreamToFile(ins, toFile);
ins.close();
}
return toFile;
}
private static File inputStreamToFile(InputStream ins, File file) {
try {
OutputStream os = new FileOutputStream(file);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytesRead);
}
os.close();
ins.close();
return file;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
原文地址:https://blog.csdn.net/W_Meng_H/article/details/131483210
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