ftp 实现文件的上传下载以及列出文件列表Java代码，上传下载java,public class

ftp 实现文件的上传下载以及列出文件列表Java代码，上传下载java,public class

public class FtpUtil {    private  Log log = LogFactory.getLog(getClass()) ;    private String userName;     private String password;    private String ip;     private int port;     private FTPClient ftpClient = null;     private FTPSClient ftps = null ;    //构造方法初始化类    public FtpUtil(String userName, String password, String ip, int port) {        this.userName = userName;        this.password = password;        this.ip = ip;        this.port = port;    }        //连接ftp    public boolean connectServer() throws Exception{        boolean flag = true;        if (ftpClient == null) {             ftpClient = new FTPClient();            ftpClient.connect(ip,port);            log.info("Connected to " + ip);            log.info(ftpClient.getReplyString());            int reply = ftpClient.getReplyCode();             if (!FTPReply.isPositiveCompletion(reply)) {                ftpClient.disconnect();                log.warn("FTP server refused connection.");                return false ;            }            boolean bok = ftpClient.login(userName, password);            if (!bok)  {                try {                    ftpClient.disconnect() ;                    ftpClient = null ;                } catch (Exception e) { }                throw new Exception("can not login ftp server") ;            }            ftpClient.setBufferSize(1024);            ftpClient.setControlEncoding("GBK");             ftpClient.setFileType(FTP.BINARY_FILE_TYPE);             ftpClient.setDataTimeout(120000);             ftpClient.enterLocalPassiveMode();            ftpClient.setUseEPSVwithIPv4(false);        }         return flag;    }        //列出所有文件内容    public List<String> listRemoteAllFiles(String path) throws Exception {          ftpClient.enterLocalPassiveMode();         FTPFile[] files = ftpClient.listFiles(path, new FTPFileFilter() {             @Override            public boolean accept(FTPFile file) {                 if (file.isFile()) return true ;                return false ;            }}) ;        List<String> list = new ArrayList() ;        for (FTPFile file : files) {            list.add(file.getName()) ;        }        return list ;    }    public void closeConnect() {         try {            if (ftpClient != null) {                ftpClient.logout();                ftpClient.disconnect();            }        } catch (Exception e) {        }    }        //下载文件    public boolean downloadFile(String remotePath, String fileName, String localPath) throws Exception {        FileOutputStream fos = null ;         try {            File localFile = new File(localPath, fileName);            fos = new FileOutputStream(localFile);            ftpClient.enterLocalPassiveMode();             ftpClient.changeWorkingDirectory(remotePath) ;            boolean bok = ftpClient.retrieveFile(fileName, fos);            fos.close() ;            fos = null ;            return bok ;        } catch (Exception e) {            throw e ;        }        finally {            if (fos!=null) {                try {                    fos.close() ;                    fos = null ;                } catch (Exception e2) { }            }        }     }        //上传文件    public boolean uploadFile(String remotePath, String filename, String localFilePath) throws Exception {        FileInputStream fis = null ;        try {            fis = new FileInputStream(new File(localFilePath));            ftpClient.enterLocalPassiveMode();             ftpClient.changeWorkingDirectory(remotePath);            boolean bok = ftpClient.storeFile(filename, fis);             fis.close();            fis = null ;            return bok ;        } catch (Exception e) {            throw e ;        }        finally {            if (fis!=null) {                try {                    fis.close() ;                    fis = null ;                } catch (Exception e2) { }            }        }    }    //删除文件    public boolean removeFile(String remotePath, String filename) throws Exception {        ftpClient.changeWorkingDirectory(remotePath);        boolean bok = ftpClient.deleteFile(filename) ;         return bok ;    }}