6、 配置springboot静态资源的访问

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class FtpConfig implements WebMvcConfigurer {
 @Override
 public void addResourceHandlers(ResourceHandlerRegistry registry) {
  //可以通过os来判断
  String os = System.getProperty("os.name");
  //linux设置
//  registry.addResourceHandler("/ftp/**").addResourceLocations("file:/home/pic/");
  //windows设置
  //第一个方法设置访问路径前缀，第二个方法设置资源路径，既可以指定项目classpath路径，也可以指定其它非项目路径
  registry.addResourceHandler("/ftp/**").addResourceLocations("file:D:\\apache-ftpserver-1.1.1\\res\\bxl-home\\");
  registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
 }
}

7、以上6步已经完成ftpserver的配置，随着springboot项目的启动就会开启ftpserver服务，下面在给大家贴一下客户端的访问的util,大家可以自行封装一下即可。

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.commons.net.ftp.FTPSClient;
import java.io.*;
public class FtpClientUtil {
 // ftp服务器ip地址
 private static String FTP_ADDRESS = "localhost";
 // 端口号
 private static int FTP_PORT = 3131;
 // 用户名
 private static String FTP_USERNAME = "bxl";
 // 密码
 private static String FTP_PASSWORD = "123456";
 // 相对路径
 private static String FTP_BASEPATH = "";
 public static boolean uploadFile(String remoteFileName, InputStream input) {
  boolean flag = false;
  FTPClient ftp = new FTPClient();
  ftp.setControlEncoding("UTF-8");
  try {
   int reply;
   ftp.connect(FTP_ADDRESS, FTP_PORT);// 连接FTP服务器
   ftp.login(FTP_USERNAME, FTP_PASSWORD);// 登录
   reply = ftp.getReplyCode();
   System.out.println("登录ftp服务返回状态码为：" + reply);
   if (!FTPReply.isPositiveCompletion(reply)) {
    ftp.disconnect();
    return flag;
   }
   ftp.setFileType(FTPClient.BINARY_FILE_TYPE);
   //设置为被动模式
   ftp.enterLocalPassiveMode();
   ftp.makeDirectory(FTP_BASEPATH);
   ftp.changeWorkingDirectory(FTP_BASEPATH);
   //originFilePath就是上传文件的文件名，建议使用生成的唯一命名，中文命名最好做转码
   boolean a = ftp.storeFile(remoteFileName, input);
//   boolean a = ftp.storeFile(new String(remoteFileName.getBytes(),"iso-8859-1"),input);
   System.out.println("要上传的原始文件名为：" + remoteFileName + ", 上传结果：" + a);
   input.close();
   ftp.logout();
   flag = true;
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   if (ftp.isConnected()) {
    try {
     ftp.disconnect();
    } catch (IOException ioe) {
    }
   }
  }
  return flag;
 }
// public static Boolean uploadFile(String remoteFileName, InputStream inputStream, String ftpAddress, int ftpPort,
//          String ftpName, String ftpPassWord, String ftpBasePath) {
//  FTP_ADDRESS = ftpAddress;
//  FTP_PORT = ftpPort;
//  FTP_USERNAME = ftpName;
//  FTP_PASSWORD = ftpPassWord;
//  FTP_BASEPATH = ftpBasePath;
//  uploadFile(remoteFileName,inputStream);
//  return true;
// }
 public static boolean deleteFile(String filename) {
  boolean flag = false;
  FTPClient ftpClient = new FTPClient();
  try {
   // 连接FTP服务器
   ftpClient.connect(FTP_ADDRESS, FTP_PORT);
   // 登录FTP服务器
   ftpClient.login(FTP_USERNAME, FTP_PASSWORD);
   // 验证FTP服务器是否登录成功
   int replyCode = ftpClient.getReplyCode();
   if (!FTPReply.isPositiveCompletion(replyCode)) {
    return flag;
   }
   // 切换FTP目录
   ftpClient.changeWorkingDirectory(FTP_BASEPATH);
   ftpClient.dele(filename);
   ftpClient.logout();
   flag = true;
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   if (ftpClient.isConnected()) {
    try {
     ftpClient.logout();
    } catch (IOException e) {
    }
   }
  }
  return flag;
 }
 public static boolean downloadFile(String filename, String localPath) {
  boolean flag = false;
//  FTPSClient ftpClient = new FTPSClient("TLS", true);
  FTPClient ftpClient = new FTPClient();
  try {
   // 连接FTP服务器
   ftpClient.connect(FTP_ADDRESS, FTP_PORT);
   // 登录FTP服务器
   ftpClient.login(FTP_USERNAME, FTP_PASSWORD);
   // 验证FTP服务器是否登录成功
   int replyCode = ftpClient.getReplyCode();
   if (!FTPReply.isPositiveCompletion(replyCode)) {
    return flag;
   }
   // 切换FTP目录
   ftpClient.changeWorkingDirectory(FTP_BASEPATH);
   //此处为demo方法，正常应该到数据库中查询fileName
   FTPFile[] ftpFiles = ftpClient.listFiles();
   for (FTPFile file : ftpFiles) {
    if (filename.equalsIgnoreCase(file.getName())) {
     File localFile = new File(localPath + "/" + file.getName());
     OutputStream os = new FileOutputStream(localFile);
     ftpClient.retrieveFile(file.getName(), os);
     os.close();
    }
   }
   ftpClient.logout();
   flag = true;
   System.out.println("文件下载完成！！！");
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   if (ftpClient.isConnected()) {
    try {
     ftpClient.logout();
    } catch (IOException e) {
    }
   }
  }
  return flag;
 }
}