/** * Created by 刘万祥 on 2016/4/29. * */public class FtpTool {    /*ftp用户名*/    private String userName;    /*ftp密码*/    private String password;    /*ftp服务器ip*/    private String ip;    private FTPClient ftpClient;    public FtpTool(String userName, String password, String ip){        this.userName = userName;        this.password = password;        this.ip = ip;    }        /**         * 上传文件         *         * @param  f 要上传的文件         * @param  uploadDir 上传文件的路径         *         * @return boolean b 上传结果         * */        public boolean putFile(File f,String uploadDir) {            InputStream instream = null;            boolean result = false;            try{                try{                    ftpClient.changeWorkingDirectory(uploadDir);                    instream = new BufferedInputStream(new FileInputStream(f));                    result = ftpClient.storeFile(f.getName(), instream);                }finally{                    if(instream!=null){                        instream.close();                    }                }            }catch(IOException e){                e.printStackTrace();            }            return result;        }        /**         * 从ftp服务器下载文件         *         * @param  f 要获取的ftp服务器上的文件         * @param  localPath 本地存放的路径         *         * @return boolean 文件下载是否成功         * */        public boolean getFile(File f  , String localPath){            OutputStream outStream = null;            boolean result = false;            try{                try{                    outStream = new BufferedOutputStream(new FileOutputStream(new File(localPath)));                    String path = f.getPath();                    path = path.replaceAll("\\\\", "/");                    String filepath = path.substring(0, path.lastIndexOf("/")+1)+"";                    String fileName = path.substring(path.lastIndexOf("/")+1)+"";                    boolean b = ftpClient.changeWorkingDirectory(filepath);                    if(b){                        result = ftpClient.retrieveFile(fileName, outStream);                    }                }finally{                    if(outStream != null){                        outStream.close();                    }                }            }catch(IOException e){                e.printStackTrace();            }            return result;        }        /**         * 获取ftp链接         *         * @return ftpClient         * */        public FTPClient getFTPClient(){            try {                ftpClient = new FTPClient();                ftpClient.connect(ip);                ftpClient.login(userName, password);            } catch (SocketException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }            return ftpClient;        }        /**         *  关闭ftpClient链接         *         *  @param ftpClient 要关闭的ftpClient对象         *         * */        public void closeFTPClient(FTPClient ftpClient){            try {                try{                    ftpClient.logout();                }finally{                    ftpClient.disconnect();                }            } catch (IOException e) {                e.printStackTrace();            }        }    public static void main(String[] args) {        FtpTool test=new FtpTool("liuwx","123","127.0.0.1");        FTPClient   client= test.getFTPClient();        System.out.println(client.isAvailable());        System.out.println(client.isConnected());//        File    file=new File("D:/160429.txt");//        boolean flag= test.putFile(file,"/");//        System.out.println(flag);//        System.out.println(test.getFile(new File("160429.txt"), "D:/123/160429.txt"));    }}