<!-- FTP -->
<dependency>
   <groupId>commons-net</groupId>
   <artifactId>commons-net</artifactId>
   <version>3.6</version>
 </dependency>
 <!-- Hutool:一個(gè)小而全的Java工具類庫，具體介紹參照附錄1 -->
 <dependency>
   <groupId>cn.hutool</groupId>
   <artifactId>hutool-all</artifactId>
   <version>5.3.7</version>
 </dependency>
 <!-- lombok:通過簡(jiǎn)單的注解的形式來幫助我們簡(jiǎn)化消除一些必須有但顯得很臃腫的 Java 代碼的工具,需要為idea添加插件，添加方法參照附錄2 -->
 <dependency>
   <groupId>org.projectlombok</groupId>
   <artifactId>lombok</artifactId>
   <version>1.18.16</version>    
 </dependency>

@Component
@Slf4j
public class FTPTools {

  /**
   * 文件上傳
   * @param hostname 域名地址
   * @param port 端口號(hào)
   * @param username 用戶名
   * @param password 密碼
   * @param fileInfo 待上傳的文件
   * @param uploadPath 待上傳到的路徑
   * @param saveName 預(yù)保存的文件名
   * @return
   */
  public static boolean upload(String hostname,int port,String username,String password,String fileInfo,String uploadPath,String saveName){
    boolean flag = false;

    FTPClient ftpClient = null;
    try {
      ftpClient = new FTPClient();
      ftpClient.connect(hostname,port);
      //每次數(shù)據(jù)連接之前，ftp client告訴ftp server開通一個(gè)端口來傳輸數(shù)據(jù)
      ftpClient.enterLocalPassiveMode();
      //設(shè)置二進(jìn)制傳輸
      ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
      ftpClient.setControlEncoding("UTF-8");
      if(ftpClient.login(username,password)){//若連接成功
        log.info("成功登錄到ftp服務(wù)端，開始文件上傳");
        flag = sendFile(ftpClient,fileInfo,uploadPath,saveName);
      }else{
        log.error("登錄到ftp服務(wù)端失敗，請(qǐng)檢查用戶名和密碼");
      }
      disconnect(ftpClient);
    }catch (SocketException e) {
      log.error("文件{}上傳失?。簕}",saveName,e.getMessage());
    } catch (IOException e) {
      log.error("文件{}上傳失?。簕}",saveName,e.getMessage());
    } finally {

    }
    return flag;
  }

  /**
   * 文件傳輸
   * @param fileInfo
   * @param uploadPath
   * @param saveName
   * @return
   */
  private static boolean sendFile(FTPClient ftpClient, String fileInfo, String uploadPath, String saveName) throws FileNotFoundException,IOException{
    boolean flag = false;
    try(FileInputStream fileInputStream = new FileInputStream(fileInfo)){
      //檢查工作目錄是否存在
      if(ftpClient.changeWorkingDirectory(uploadPath)){
      	if(ftpClient.listFiles(saveName).length != 0){ //檢查文件是否已經(jīng)存在
          boolean deleteFlag = ftpClient.deleteFile(saveName);
          log.info(deleteFlag?"文件已存在，直接刪除":"存在同名文件且無法刪除，請(qǐng)檢查權(quán)限");
        }
        flag = ftpClient.storeFile(saveName,fileInputStream);
        log.info(flag?"文件上傳成功！":"文件上傳失?。?);
      }else{
        log.error("找不到要上傳的目錄");
      }
    }catch (FileNotFoundException e){
      log.error("找不到要上傳的文件{}：{}",fileInfo,e.getMessage());
      throw e;
    }catch (IOException e){
      log.error("文件傳輸異常：{}",e.getMessage());
      throw e;
    }
    return flag;
  }

  /**
   * 斷開ftp連接
   * @param ftpClient
   */
  private static void disconnect(FTPClient ftpClient) {
    if (ftpClient.isConnected()){
      try{
        ftpClient.disconnect();
        log.info("ftp連接已關(guān)閉，文件上傳結(jié)束");
      }catch (IOException e){
        log.error("ftp連接關(guān)閉失敗:{}",e);
      }
    }
  }

}

  //ftp配置信息
  String hostname = "127.0.0.1"; //域名地址
  int port = 21; //端口號(hào)
  String username = "lmh"; //用戶名
  String password = "123456"; //密碼
  String fileInfo = "E:\\Temporary\\1.file"; //待上傳的文件目錄
  String uploadPath = "/"; //待上傳到的路徑
  String saveName = FTP+ "_" + DateUtil.format(new Date(),"yyyyMMdd"); //預(yù)保存的文件名
  FTPTools.upload(hostname, port, username, password, fileInfo, uploadPath, saveName);

SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
String date = sdf.format(new Date());

String date = DateUtil.format(new Date(),"yyyyMMdd");