ftp

作者: 咚了个汐 | 来源:发表于2018-11-08 14:20 被阅读13次

    commons-net.jar

    public class FtpUtils {
            //ftp服务器地址
            public String hostname = "192.168.1.1";
            //ftp服务器端口号默认为21
            public Integer port = 21 ;
            //ftp登录账号
            public String username = "root";
            //ftp登录密码
            public String password = "123";
            
            public FTPClient ftpClient = null;
            
            /**
             * 初始化ftp服务器
             */
            public void initFtpClient() {
                ftpClient = new FTPClient();
                ftpClient.setControlEncoding("utf-8");
                try {
                    System.out.println("connecting...ftp服务器:"+this.hostname+":"+this.port); 
                    ftpClient.connect(hostname, port); //连接ftp服务器
                    ftpClient.login(username, password); //登录ftp服务器
                    int replyCode = ftpClient.getReplyCode(); //是否成功登录服务器
                    if(!FTPReply.isPositiveCompletion(replyCode)){
                        System.out.println("connect failed...ftp服务器:"+this.hostname+":"+this.port); 
                    }
                    System.out.println("connect successfu...ftp服务器:"+this.hostname+":"+this.port); 
                }catch (MalformedURLException e) { 
                   e.printStackTrace(); 
                }catch (IOException e) { 
                   e.printStackTrace(); 
                } 
            }
    
            /**
            * 上传文件
            * @param pathname ftp服务保存地址
            * @param fileName 上传到ftp的文件名
            *  @param originfilename 待上传文件的名称(绝对地址) * 
            * @return
            */
            public boolean uploadFile( String pathname, String fileName,String originfilename){
                boolean flag = false;
                InputStream inputStream = null;
                try{
                    System.out.println("开始上传文件");
                    inputStream = new FileInputStream(new File(originfilename));
                    initFtpClient();
                    ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);
                    CreateDirecroty(pathname);
                    ftpClient.makeDirectory(pathname);
                    ftpClient.changeWorkingDirectory(pathname);
                    ftpClient.storeFile(fileName, inputStream);
                    inputStream.close();
                    ftpClient.logout();
                    flag = true;
                    System.out.println("上传文件成功");
                }catch (Exception e) {
                    System.out.println("上传文件失败");
                    e.printStackTrace();
                }finally{
                    if(ftpClient.isConnected()){ 
                        try{
                            ftpClient.disconnect();
                        }catch(IOException e){
                            e.printStackTrace();
                        }
                    } 
                    if(null != inputStream){
                        try {
                            inputStream.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        } 
                    } 
                }
                return true;
            }
            /**
             * 上传文件
             * @param pathname ftp服务保存地址
             * @param fileName 上传到ftp的文件名
             * @param inputStream 输入文件流 
             * @return
             */
            public boolean uploadFile( String pathname, String fileName,InputStream inputStream){
                boolean flag = false;
                try{
                    System.out.println("开始上传文件");
                    initFtpClient();
                    ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);
                    CreateDirecroty(pathname);
                    ftpClient.makeDirectory(pathname);
                    ftpClient.changeWorkingDirectory(pathname);
                    ftpClient.storeFile(fileName, inputStream);
                    inputStream.close();
                    ftpClient.logout();
                    flag = true;
                    System.out.println("上传文件成功");
                }catch (Exception e) {
                    System.out.println("上传文件失败");
                    e.printStackTrace();
                }finally{
                    if(ftpClient.isConnected()){ 
                        try{
                            ftpClient.disconnect();
                        }catch(IOException e){
                            e.printStackTrace();
                        }
                    } 
                    if(null != inputStream){
                        try {
                            inputStream.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        } 
                    } 
                }
                return true;
            }
            //改变目录路径
             public boolean changeWorkingDirectory(String directory) {
                    boolean flag = true;
                    try {
                        flag = ftpClient.changeWorkingDirectory(directory);
                        if (flag) {
                          System.out.println("进入文件夹" + directory + " 成功!");
    
                        } else {
                            System.out.println("进入文件夹" + directory + " 失败!开始创建文件夹");
                        }
                    } catch (IOException ioe) {
                        ioe.printStackTrace();
                    }
                    return flag;
                }
    
            //创建多层目录文件,如果有ftp服务器已存在该文件,则不创建,如果无,则创建
            public boolean CreateDirecroty(String remote) throws IOException {
                boolean success = true;
                String directory = remote + "/";
                // 如果远程目录不存在,则递归创建远程服务器目录
                if (!directory.equalsIgnoreCase("/") && !changeWorkingDirectory(new String(directory))) {
                    int start = 0;
                    int end = 0;
                    if (directory.startsWith("/")) {
                        start = 1;
                    } else {
                        start = 0;
                    }
                    end = directory.indexOf("/", start);
                    String path = "";
                    String paths = "";
                    while (true) {
                        String subDirectory = new String(remote.substring(start, end).getBytes("GBK"), "iso-8859-1");
                        path = path + "/" + subDirectory;
                        if (!existFile(path)) {
                            if (makeDirectory(subDirectory)) {
                                changeWorkingDirectory(subDirectory);
                            } else {
                                System.out.println("创建目录[" + subDirectory + "]失败");
                                changeWorkingDirectory(subDirectory);
                            }
                        } else {
                            changeWorkingDirectory(subDirectory);
                        }
    
                        paths = paths + "/" + subDirectory;
                        start = end + 1;
                        end = directory.indexOf("/", start);
                        // 检查所有目录是否创建完毕
                        if (end <= start) {
                            break;
                        }
                    }
                }
                return success;
            }
    
          //判断ftp服务器文件是否存在    
            public boolean existFile(String path) throws IOException {
                    boolean flag = false;
                    FTPFile[] ftpFileArr = ftpClient.listFiles(path);
                    if (ftpFileArr.length > 0) {
                        flag = true;
                    }
                    return flag;
                }
            //创建目录
            public boolean makeDirectory(String dir) {
                boolean flag = true;
                try {
                    flag = ftpClient.makeDirectory(dir);
                    if (flag) {
                        System.out.println("创建文件夹" + dir + " 成功!");
    
                    } else {
                        System.out.println("创建文件夹" + dir + " 失败!");
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return flag;
            }
            
            /** * 下载文件 * 
            * @param pathname FTP服务器文件目录 * 
            * @param filename 文件名称 * 
            * @param localpath 下载后的文件路径 * 
            * @return */
            public  boolean downloadFile(String pathname, String filename, String localpath){ 
                boolean flag = false; 
                OutputStream os=null;
                try { 
                    System.out.println("开始下载文件");
                    initFtpClient();
                    //切换FTP目录 
                    ftpClient.changeWorkingDirectory(pathname); 
                    FTPFile[] ftpFiles = ftpClient.listFiles(); 
                    for(FTPFile file : ftpFiles){ 
                        if(filename.equalsIgnoreCase(file.getName())){ 
                            File localFile = new File(localpath + "/" + file.getName()); 
                            os = new FileOutputStream(localFile); 
                            ftpClient.retrieveFile(file.getName(), os); 
                            os.close(); 
                        } 
                    } 
                    ftpClient.logout(); 
                    flag = true; 
                    System.out.println("下载文件成功");
                } catch (Exception e) { 
                    System.out.println("下载文件失败");
                    e.printStackTrace(); 
                } finally{ 
                    if(ftpClient.isConnected()){ 
                        try{
                            ftpClient.disconnect();
                        }catch(IOException e){
                            e.printStackTrace();
                        }
                    } 
                    if(null != os){
                        try {
                            os.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        } 
                    } 
                } 
                return flag; 
            }
            
            /** * 删除文件 * 
            * @param pathname FTP服务器保存目录 * 
            * @param filename 要删除的文件名称 * 
            * @return */ 
            public boolean deleteFile(String pathname, String filename){ 
                boolean flag = false; 
                try { 
                    System.out.println("开始删除文件");
                    initFtpClient();
                    //切换FTP目录 
                    ftpClient.changeWorkingDirectory(pathname); 
                    ftpClient.dele(filename); 
                    ftpClient.logout();
                    flag = true; 
                    System.out.println("删除文件成功");
                } catch (Exception e) { 
                    System.out.println("删除文件失败");
                    e.printStackTrace(); 
                } finally {
                    if(ftpClient.isConnected()){ 
                        try{
                            ftpClient.disconnect();
                        }catch(IOException e){
                            e.printStackTrace();
                        }
                    } 
                }
                return flag; 
            }
            
            public static void main(String[] args) {
                FtpUtils ftp =new FtpUtils(); 
                //ftp.uploadFile("ftpFile/data", "123.docx", "E://123.docx");
                //ftp.downloadFile("ftpFile/data", "123.docx", "F://");
                ftp.deleteFile("ftpFile/data", "123.docx");
                System.out.println("ok");
            }
    }
    

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