首先对于配置FTP服务器1.1、vsftpd.conf以装置在linux下的FTP为例，首先查找到vsftpd的配置文件（默认装置的状况下配置文件位于/etc/vsftpd/vsftpd.conf），而后进行编写。具体的表格如下：
choose_local_user=YESchoose_local_user=NOchoose_list_enbale=YES1.所有用户都被限度在其主目录下 2.应用chroot_list_file指定的用户列表，这些用户作为“例外”，不受限制1.所有用户都不被限度其主目录下 2.应用chroot_list_file指定的用户列表，这些用户作为“例外”，受到限制choose_list_enable=NO1、所有用户都被限度在其主目录下2.没有例外用户1.所有用户都没有限度，也没有例外用户package com.manage.util;import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPFile;import org.apache.commons.net.ftp.FTPReply;import java.io.*;import static org.apache.commons.codec.binary.StringUtils.newString;/** * @Author: lgz * @Date: 2020/6/8 13:40 */public class FTPConnectUtil { private String FTP_ADDRESS = "192.168.174.140"; private int PORT = 21; private String FTP_USERNAME = "admin"; private String FTP_PASSWORD = "123"; private String FTP_PATH = "/home/admin/files"; public FTPClient ftpClient = null; /** * 初始化ftp服务器 */ public void initFtpClient() { ftpClient = new FTPClient(); ftpClient.setControlEncoding("utf-8"); try { System.out.println("connecting...ftp服务器:" + this.FTP_ADDRESS + ":" + this.PORT); ftpClient.connect(FTP_ADDRESS, PORT); //连贯ftp服务器 ftpClient.login(FTP_USERNAME, FTP_PASSWORD); //登录ftp服务器 int replyCode = ftpClient.getReplyCode(); //是否胜利登录服务器 if (!FTPReply.isPositiveCompletion(replyCode)) { System.out.println("connect failed...ftp服务器:" + this.FTP_ADDRESS + ":" + this.PORT); } System.out.println("connect successful"); } catch (IOException e) { e.printStackTrace(); } } /** * 上传文件 * * @param pathname ftp服务保留地址 * @param fileName 上传到ftp的文件名 * @param originfilename 待上传文件的名称（相对地址） * * @return */ public boolean uploadFile(String pathname, String fileName, String originfilename) { boolean flag = false; InputStream inputStream = null; try { System.out.println("开始上传文件"); inputStream = new FileInputStream(new File(originfilename)); initFtpClient(); ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE); // CreateDirecroty(pathname); // ftpClient.makeDirectory(pathname); ftpClient.changeWorkingDirectory(pathname); ftpClient.storeFile(fileName, inputStream); inputStream.close(); ftpClient.logout(); flag = true; System.out.println("上传文件胜利"); } catch (Exception e) { System.out.println("上传文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } if (null != inputStream) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } return true; } /** * 上传文件 * * @param pathname ftp服务保留地址 * @param fileName 上传到ftp的文件名 * @param inputStream 输出文件流 * @return */ public boolean uploadFile(String pathname, String fileName, InputStream inputStream) { boolean flag = false; try { System.out.println("开始上传文件"); initFtpClient(); ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE); ftpClient.enterLocalPassiveMode(); CreateDirecroty(pathname); ftpClient.makeDirectory(pathname); ftpClient.changeWorkingDirectory(pathname); ftpClient.storeFile( new String(fileName.getBytes("GBK"),"ISO-8859-1"), inputStream); Thread.sleep(200); System.out.println("正在上传图片"); inputStream.close(); ftpClient.logout(); flag = true; System.out.println("上传文件胜利"); } catch (Exception e) { System.out.println("上传文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } if (null != inputStream) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } return true; } //扭转目录门路 public boolean changeWorkingDirectory(String directory) { boolean flag = true; try { flag = ftpClient.changeWorkingDirectory(directory); if (flag) { System.out.println("进入文件夹" + directory + " 胜利！"); } else { System.out.println("进入文件夹" + directory + " 失败！开始创立文件夹"); } } catch (IOException ioe) { ioe.printStackTrace(); } return flag; } //创立多层目录文件，如果有ftp服务器已存在该文件，则不创立，如果无，则创立 public boolean CreateDirecroty(String remote) throws IOException { boolean success = true; String directory = remote + "/"; // 如果近程目录不存在，则递归创立近程服务器目录 if (!directory.equalsIgnoreCase("/") && !changeWorkingDirectory(new String(directory))) { int start = 0; int end = 0; if (directory.startsWith("/")) { start = 1; } else { start = 0; } end = directory.indexOf("/", start); String path = ""; String paths = ""; while (true) { String subDirectory = new String(remote.substring(start, end).getBytes("GBK"), "iso-8859-1"); path = path + "/" + subDirectory; if (!existFile(path)) { if (makeDirectory(subDirectory)) { changeWorkingDirectory(subDirectory); } else { System.out.println("创立目录[" + subDirectory + "]失败"); changeWorkingDirectory(subDirectory); } } else { changeWorkingDirectory(subDirectory); } paths = paths + "/" + subDirectory; start = end + 1; end = directory.indexOf("/", start); // 查看所有目录是否创立结束 if (end <= start) { break; } } } return success; } //判断ftp服务器文件是否存在 public boolean existFile(String path) throws IOException { boolean flag = false; FTPFile[] ftpFileArr = ftpClient.listFiles(path); if (ftpFileArr.length > 0) { flag = true; } return flag; } //创立目录 public boolean makeDirectory(String dir) { boolean flag = true; try { flag = ftpClient.makeDirectory(dir); if (flag) { System.out.println("创立文件夹" + dir + " 胜利！"); } else { System.out.println("创立文件夹" + dir + " 失败！"); } } catch (Exception e) { e.printStackTrace(); } return flag; } /** * 下载文件 * * * @param pathname FTP服务器文件目录 * * @param filename 文件名称 * * @param localpath 下载后的文件门路 * * @return */ public boolean downloadFile(String pathname, String filename, String localpath) { boolean flag = false; OutputStream os = null; try { System.out.println("开始下载文件"); initFtpClient(); //切换FTP目录 ftpClient.changeWorkingDirectory(pathname); //改为被动模式 ftpClient.enterLocalPassiveMode(); System.out.println(filename); FTPFile[] ftpFiles = ftpClient.listFiles(); for (FTPFile file : ftpFiles) { int type = file.getType(); if (filename.equalsIgnoreCase(file.getName())) { System.out.println(localpath); File localFile = new File(localpath + "/" + filename); // os = new FileOutputStream(localFile); // os ==null ftpClient.retrieveFile(newString(filename.getBytes("UTF-8"), "ISO-8859-1"), os); os.close(); } } ftpClient.logout(); flag = true; System.out.println("下载文件胜利"); } catch (Exception e) { System.out.println("下载文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } if (null != os) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } } return flag; } /** * 删除文件 * * * @param pathname FTP服务器保留目录 * * @param filename 要删除的文件名称 * * @return */ public boolean deleteFile(String pathname, String filename) { boolean flag = false; try { System.out.println("开始删除文件"); initFtpClient(); //切换FTP目录 ftpClient.changeWorkingDirectory(pathname); ftpClient.dele(filename); ftpClient.logout(); flag = true; System.out.println("删除文件胜利"); } catch (Exception e) { System.out.println("删除文件失败"); e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } } return flag; }}