docker run -d -p 80:80 -p 443:443 --name nginx-server -v /home/nginx/www:/usr/share/nginx/html 
-v /home/nginx/conf/nginx.conf:/etc/nginx/nginx.conf -v /home/nginx/logs:/var/log/nginx nginx

user root;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
 worker_connections 1024;
}
http {
 include /etc/nginx/mime.types;
 default_type application/octet-stream;
 log_format main '$remote_addr - $remote_user [$time_local] "$request" '
   '$status $body_bytes_sent "$http_referer" '
   '"$http_user_agent" "$http_x_forwarded_for"';
 access_log /var/log/nginx/access.log main;
 sendfile on;
 #tcp_nopush on;
 keepalive_timeout 65;
 #gzip on;
 include /etc/nginx/conf.d/*.conf;
 server {
 listen 443 ssl;
 server_name 你的 ip 地址或域名;
 root  /usr/share/nginx/html;
 ssl_certificate 你的密钥.pem;
 ssl_certificate_key 你的密钥.key;
 ssl_session_timeout 5m;
 ssl_session_cache shared:SSL:1m;
 ssl_ciphers  ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:aNULL:!MD5:!ADH:!RC4;
 ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
 ssl_prefer_server_ciphers on;
 # 跳转到8080端口，即我的tomcat容器，如果浏览器输入 https://ip/ 则跳转到tomcat容器（已经运行并映射端口号）
 location / {
  root /usr/share/nginx/html;
  proxy_pass http://ip:8080/;
  index index.html index.htm;
 }
　　　　　# 如果浏览器输入 https://ip/images/ 则对应宿主机上的 /home/nginx/www/images/ 因为前面已经挂载了，即宿主机某个目录和docker容器内的某个文件夹共享数据
　　　　　# 要先在宿主机的 /home/nginx/www/ 中创建 images 目录
 location ~ /images/ {
  root /usr/share/nginx/html/;
 }
 }
 server {
 listen 80;
 server_name 你的 ip 地址或域名;
 rewrite ^ https://$host$1 permanent;
 }
} 

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
import java.io.*;
/**
 * @author Max
 */
@Component
@PropertySource("classpath:ftpResource.properties")
public class FtpUtil {
 /**
 * FTP_ADDRESS: ftp 服务器ip地址
 * FTP_PORT: ftp 服务器port，默认是21
 * FTP_USERNAME: ftp 服务器用户名
 * FTP_PASSWORD: ftp 服务器密码
 * FTP_BASE_PATH: ftp 服务器存储图片的绝对路径
 * IMAGE_BASE_URL: ftp 服务器外网访问图片路径
 */
 @Value("${FTP_ADDRESS}")
 private String FTP_ADDRESS;
 @Value("${FTP_PORT}")
 private Integer FTP_PORT;
 @Value("${FTP_USERNAME}")
 private String FTP_USERNAME;
 @Value("${FTP_PASSWORD}")
 private String FTP_PASSWORD;
 @Value("${FTP_BASE_PATH}")
 private String FTP_BASE_PATH;
 @Value("${IMAGE_BASE_URL}")
 private String IMAGE_BASE_URL;
 /**
 * 上传图片
 * @param inputStream 输入流
 * @param name 文件名
 * @return 图片 url
 * @throws IOException IO异常
 */
 public String uploadImage(InputStream inputStream, String name) throws IOException {
 FTPClient ftpClient = new FTPClient();
 try {
  System.out.println(FTP_ADDRESS);
  ftpClient.enterLocalPassiveMode();
  ftpClient.connect(FTP_ADDRESS, FTP_PORT);
  ftpClient.login(FTP_USERNAME, FTP_PASSWORD);
  ftpClient.changeWorkingDirectory(FTP_BASE_PATH);
  ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
  boolean isSucceed = ftpClient.storeFile(name, inputStream);
  if (isSucceed){
  return IMAGE_BASE_URL + name;
  }
 }catch (Exception e){
  e.printStackTrace();
 }finally {
  ftpClient.logout();
 }
 return IMAGE_BASE_URL + "error";
 }
}

@Autowired
 private FtpUtil ftpUtil;

 @Override
 public int insertImg(MultipartFile file) throws IOException {
 /*
 1、获取上传的文件流 inputStream 以及文件名 getOriginalFilename
 2、调用 FtpUtil 中的函数，将图片上传到图片服务器并返回 https 地址
 3、若返回的是图片地址，则将其插入数据库
  */
 InputStream inputStream = file.getInputStream();
 String filename = file.getOriginalFilename();
 String picUrl = ftpUtil.uploadImage(inputStream, filename);
 }