4、配置监听器，使spring容器启动时启动ftpserver，在spring容器销毁时停止ftpserver

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
@WebListener
public class FtpServerListener implements ServletContextListener {
 private static final Logger logger = LoggerFactory.getLogger(MyFtpServer.class);
 private static final String SERVER_NAME="FTP-SERVER";
 @Autowired
 private MyFtpServer server;
 //容器关闭时调用方法stop ftpServer
 public void contextDestroyed(ServletContextEvent sce) {
//  WebApplicationContext ctx= WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext());
//  MyFtpServer server=(MyFtpServer)ctx.getServletContext().getAttribute(SERVER_NAME);
  server.stop();
  sce.getServletContext().removeAttribute(SERVER_NAME);
  logger.info("Apache Ftp server is stoped!");
 }
 //容器初始化调用方法start ftpServer
 public void contextInitialized(ServletContextEvent sce) {
//  WebApplicationContext ctx= WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext());
//  MyFtpServer server=(MyFtpServer) ctx.getBean("MyFtp");
  sce.getServletContext().setAttribute(SERVER_NAME,server);
  try {
   //项目启动时已经加载好了
   server.start();
   logger.info("Apache Ftp server is started!");
  } catch (Exception e){
   e.printStackTrace();
   throw new RuntimeException("Apache Ftp server start failed!", e);
  }
 }
}

5、通过继承DefaultFtplet抽象类来实现一些自定义用户事件（我这里只是举例）

import org.apache.ftpserver.ftplet.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
public class MyFtpPlet extends DefaultFtplet {
 private static final Logger logger = LoggerFactory.getLogger(MyFtpPlet.class);
 @Override
 public FtpletResult onUploadStart(FtpSession session, FtpRequest request)
   throws FtpException, IOException {
  //获取上传文件的上传路径
  String path = session.getUser().getHomeDirectory();
  //获取上传用户
  String name = session.getUser().getName();
  //获取上传文件名
  String filename = request.getArgument();
  logger.info("用户:'{}'，上传文件到目录：'{}'，文件名称为：'{}'，状态：开始上传~", name, path, filename);
  return super.onUploadStart(session, request);
 }
 @Override
 public FtpletResult onUploadEnd(FtpSession session, FtpRequest request)
   throws FtpException, IOException {
  //获取上传文件的上传路径
  String path = session.getUser().getHomeDirectory();
  //获取上传用户
  String name = session.getUser().getName();
  //获取上传文件名
  String filename = request.getArgument();
  logger.info("用户:'{}'，上传文件到目录：'{}'，文件名称为：'{}，状态：成功！'", name, path, filename);
  return super.onUploadEnd(session, request);
 }
 @Override
 public FtpletResult onDownloadStart(FtpSession session, FtpRequest request) throws FtpException, IOException {
  //todo servies...
  return super.onDownloadStart(session, request);
 }
 @Override
 public FtpletResult onDownloadEnd(FtpSession session, FtpRequest request) throws FtpException, IOException {
  //todo servies...
  return super.onDownloadEnd(session, request);
 }
}