Java实现文件上传到服务器（FTP方式）
1，jar包：commons-net-3.3.jar
2，实现代码：
//FTP传输到数据库服务器private boolean uploadServerByFtps(){boolean flag = true;//获取客户端数据文件路径String client_path = Pub.getPropertiesValue("analysis", "analysis.client.data.path");//获取数据库服务器上的存放数据文件路径String server_path = Pub.getPropertiesValue("analysis", "analysis.server.data.path");String hostname = Pub.getPropertiesValue("analysis", "ftp.hostname");String ftpusername = Pub.getPropertiesValue("analysis", "ftp.username");String ftppwd = Pub.getPropertiesValue("analysis", "ftp.pwd");int port = 21;logger.info("ftp server infor:hostname:"+hostname+" ftpusername:"+ftpusername+" ftppwd:"+ftppwd+" port:"+port);//遍历客户端数据文件路径下的txt文件，然后采用FTP上传File client_dir = new File(client_path); if(!client_dir.exists()){logger.info("The file directory on the host you want to read does not exist");return flag;}File client_files[] = client_dir.listFiles();if(client_files.length == 0){logger.info("You want to read the file directory without any files");return flag;}//开始遍历文件//创建ftp客户端FTPClient ftpClient = new FTPClient();ftpClient.setControlEncoding("GBK");for(int i=0;i<client_files.length;i++){ String getfileName = client_files[i].getName();String getfileNamePath = client_files[i].getPath();//只对txt文件做处理if((getfileName.substring(getfileName.lastIndexOf(".")).trim().equals(".txt"))){//todo:增加控制文件（已经传输过的文件）的传输try {//链接ftp服务器ftpClient.connect(hostname, port);//登录ftpftpClient.login(ftpusername, ftppwd);int reply = ftpClient.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftpClient.disconnect();logger.info("Returns a 530 password username error or the current user does not have permission to close the FTP connection");return false;}ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);// ftpClient.makeDirectory("path");//在root目录下创建文件夹String server_file_name = server_path+ getfileName;logger.info("server_file_name>>>>>>: " + server_file_name);logger.info("getfileNamePath>>>>>>: " + getfileNamePath);//读取源文件流（客户端文件）InputStream client_fileInput = new FileInputStream(getfileNamePath);//传送到服务端ftpClient.storeFile(server_file_name, client_fileInput);//文件你若是不指定就会上传到root目录下client_fileInput.close();ftpClient.logout();logger.info("ftp is success");} catch (SocketException e) {// TODO Auto-generated catch blocklogger.info("port problem: "+e.toString());e.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocklogger.info("IO problem: "+e.toString());e.printStackTrace();} catch (Exception e) {logger.info("ftp problem: "+e.toString());e.printStackTrace();}finally {if (ftpClient.isConnected()) {try {ftpClient.disconnect();} catch (IOException ioe) {ioe.printStackTrace();logger.info("IO problem: "+ioe.toString());}}}}}return flag;}
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