Java实现图片上传至服务器功能（FTP协议）

/** * ftp 文件操作服务实现类 *  */@Servicepublic class FtpFileServiceImpl implements IFtpFileService {  /**ftp 服务器*/  @Value("${PTFSERVER}")  private String server;  /**Ftp 用户名*/  @Value("${PTFUSERNAME}")  private String uname;  /**ftp 密码*/  @Value("${PTFPWD}")  private String pwd;  /**本地字符集编码*/  private static final String LOCAL_CHARSET = "GBK";  /**ftp 服务器字符集编码*/  private static final String SERVER_CHARSET = "ISO-8859-1";  /**   * ftp 文件上传   */  @Override  public void ftpUpload(File srcFile, String fileName, String foldName) {    FTPClient ftpClient = new FTPClient();    FileInputStream fis = null;    String charset = LOCAL_CHARSET;    try {      ftpClient.connect(server);      ftpClient.login(uname, pwd);      fis = new FileInputStream(srcFile);      // 设置上传目录      ftpClient.changeWorkingDirectory(foldName);      ftpClient.setBufferSize(1024);      ftpClient.enterLocalPassiveMode();      if (FTPReply.isPositiveCompletion(ftpClient.sendCommand("OPTS UTF8", "ON"))) {        // 开启服务器对UTF-8的支持，如果服务器支持就用UTF-8编码，否则就使用本地编码（GBK）.        charset = "UTF-8";      }      ftpClient.setControlEncoding(charset);      fileName = new String(fileName.getBytes(charset),SERVER_CHARSET);      // 设置文件类型（二进制）      ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);      ftpClient.storeFile(fileName, fis);    } catch (IOException e) {      throw new EhospitalServiceException(ResponseCode.RESPONSE_COMMON_ERROR_CODE, "FTP客户端出错！", e);    } finally {      try {        ftpClient.disconnect();      } catch (IOException e) {        throw new EhospitalServiceException(ResponseCode.RESPONSE_COMMON_ERROR_CODE, "关闭FTP连接发生异常！", e);      }    }  }