FtpUtil

application.yml

ftp:
  host: 自己服务器ip
  userName: 服务器账号
  password: 服务器密码
  port: 22
  rootPath: /usr/nginx/image
  img:
    url: http://ip:9090/      # ftp.img.url 可以不添加，这里只是为了上传文件成功后返回文件路径
file:
  upload:
    path: /usr/local/nginx/image/ # Linux下文件的上传路径

FtpUtil.java

import com.jcraft.jsch.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.io.InputStream;
import java.util.Properties;

@Component
public class FtpUtil {
    private static Logger logger = LoggerFactory.getLogger(FtpUtil.class);

    
    private static String host;

    @Value("${ftp.host}")
    public void setHost(String val){
        FtpUtil.host = val;
    }

    
    private static int port;

    @Value("${ftp.port}")
    public void setPort(int val){
        FtpUtil.port = val;
    }

    
    private static String userName;

    @Value("${ftp.userName}")
    public void setUserName(String val){
        FtpUtil.userName = val;
    }

    
    private static String password;

    @Value("${ftp.password}")
    public void setPassword(String val){
        FtpUtil.password = val;
    }

    
    private static String rootPath;

    @Value("${ftp.rootPath}")
    public void setRootPath(String val){
        FtpUtil.rootPath = val;
    }

    
    private static String imgUrl;

    @Value("${ftp.img.url}")
    public void setImgUrl(String val){
        FtpUtil.imgUrl = val;
    }

    
    private static ChannelSftp getChannel() throws Exception{
        JSch jsch = new JSch();

        //->ssh root@host:port
        Session sshSession = jsch.getSession(userName,host,port);
        //密码
        sshSession.setPassword(password);

        Properties sshConfig = new Properties();
        sshConfig.put("StrictHostKeyChecking", "no");
        sshSession.setConfig(sshConfig);
        sshSession.connect();

        Channel channel = sshSession.openChannel("sftp");
        channel.connect();

        return (ChannelSftp) channel;
    }

    
    public static String putImages(InputStream inputStream, String imagePath, String imagesName){
        try {
            ChannelSftp sftp = getChannel();
            String path = rootPath + imagePath + "/";
            createDir(path,sftp);

            //上传文件
            sftp.put(inputStream, path + imagesName);
            logger.info("上传成功！");
            sftp.quit();
            sftp.exit();

            //处理返回的路径
            String resultFile;
            resultFile = imgUrl + imagePath + imagesName;

            return resultFile;

        } catch (Exception e) {
            logger.error("上传失败：" + e.getMessage());
        }
        return "";
    }

    
    private static void createDir(String path,ChannelSftp sftp) throws SftpException {
        String[] folders = path.split("/");
        sftp.cd("/");
        for ( String folder : folders ) {
            if ( folder.length() > 0 ) {
                try {
                    sftp.cd( folder );
                }catch ( SftpException e ) {
                    sftp.mkdir( folder );
                    sftp.cd( folder );
                }
            }
        }
    }

    
    public static void delImages(String imagesName){
        try {
            ChannelSftp sftp = getChannel();
            String path = rootPath + imagesName;
            sftp.rm(path);
            sftp.quit();
            sftp.exit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

NginxService.java

import com.ecio.common.utils.DateTimeUtil;
import com.ecio.common.utils.FtpUtil;
import com.ecio.common.utils.IDUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;

@Service
@Slf4j
public class NginxService {

    public Object uploadPicture(MultipartFile uploadFile) {
        //1、给上传的图片生成新的文件名
        //1.1获取原始文件名
        String oldName = uploadFile.getOriginalFilename();
        //1.2使用IDUtils工具类生成新的文件名，新文件名 = newName + 文件后缀
        String newName = IDUtils.genImageName();
        assert oldName != null;
        newName = newName + oldName.substring(oldName.lastIndexOf("."));
        //1.3生成文件在服务器端存储的子目录
        String filePath = DateTimeUtil.getFormatDate("/yyyyMMdd/");
        //  new DateTime().toString("/yyyyMMdd/");
        // DateTimeUtil.getFormatDate("/yyyyMMdd/");

        //2、把图片上传到图片服务器
        //2.1获取上传的io流
        InputStream input = null;
        try {
            input = uploadFile.getInputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }

        //2.2调用FtpUtil工具类进行上传
        return FtpUtil.putImages(input, filePath, newName);
    }

}