Java实现连接FTP服务并传递文件
public class FtpClientUtil { private String host; private int port; private String username; private String password; private int bufferSize = 10 * 1024 * 1024; private int soTimeout = 15000; private FTPClient ftp; public FTPClient getFtp() { return ftp; } public void setFtp(FTPClient ftp) { this.ftp = ftp; } private UploadStatus uploadStatus; public UploadStatus getUploadStatus() { return uploadStatus; } public void setUploadStatus(UploadStatus uploadStatus) { this.uploadStatus = uploadStatus; } public static class Builder { private String host; private int port = 21; private String username; private String password; private int bufferSize = 1024 * 1024; private FTPClientConfig config; private int defaultTimeout = 15000; private int connectTimeout = 15000; private int dataTimeout = 15000; private int controlKeepAliveTimeout = 300; private int soTimeout = 15000; public Builder() { } public Builder host(String host) { this.host = host; return this; } public Builder port(int port) { this.port = port; return this; } public Builder username(String username) { this.username = username; return this; } public Builder password(String password) { this.password = password; return this; } public Builder bufferSize(int bufferSize) { this.bufferSize = bufferSize; return this; } public Builder config(FTPClientConfig config) { this.config = config; return this; } public Builder defaultTimeout(int defaultTimeout) { this.defaultTimeout = defaultTimeout; return this; } public Builder connectTimeout(int connectTimeout) { this.connectTimeout = connectTimeout; return this; } public Builder dataTimeout(int dataTimeout) { this.dataTimeout = dataTimeout; return this; } public Builder soTimeout(int soTimeout) { this.soTimeout = soTimeout; return this; } public Builder controlKeepAliveTimeout(int controlKeepAliveTimeout) { this.controlKeepAliveTimeout = controlKeepAliveTimeout; return this; } public FtpClientUtil build() throws IOException { FtpClientUtil instance = new FtpClientUtil(this.host, this.port, this.username, this.password, this.bufferSize, this.config, this.defaultTimeout, this.dataTimeout, this.connectTimeout, this.controlKeepAliveTimeout, this.soTimeout); return instance; } } private FtpClientUtil(String host, int port, String username, String password, int bufferSize, FTPClientConfig config, int defaultTimeout, int dataTimeout, int connectTimeout, int controlKeepAliveTimeout, int soTimeout) throws IOException { this.host = host; this.port = port; this.username = username; this.password = password; this.bufferSize = bufferSize; this.soTimeout = soTimeout; this.ftp = new FTPClient(); if (config != null) { this.ftp.configure(config); } ftp.setControlEncoding("UTF-8"); // ftp.setControlEncoding("GBK"); // ftp.setControlEncoding("gb2312"); ftp.enterLocalPassiveMode(); ftp.setDefaultTimeout(defaultTimeout); ftp.setConnectTimeout(connectTimeout); ftp.setDataTimeout(dataTimeout); // ftp.setSendDataSocketBufferSize(1024 * 256); if (this.bufferSize > 0) { ftp.setBufferSize(this.bufferSize); } // keeping the control connection alive ftp.setControlKeepAliveTimeout(controlKeepAliveTimeout);// 每大约5分钟发一次noop，防止大文件传输导致的控制连接中断 } public FtpClientUtil connect() throws SocketException, IOException { if (!this.ftp.isConnected()) { this.ftp.connect(this.host, this.port); int reply = this.ftp.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) { logger.warn("ftp服务器返回码[{}], 连接失败...", reply); throw new IllegalStateException("连接ftp服务器失败,返回的状态码是" + reply); } } this.ftp.setSoTimeout(this.soTimeout); return this; } public FtpClientUtil login() throws IOException { boolean suc = this.ftp.login(this.username, this.password); if (!suc) { throw new IllegalStateException("登录ftp服务器失败"); } return this; } /** * ftp上传文件功能 * * @param file * 要上传的文件 * @param relativePath * 要上传到ftp服务器的相对路径 * @return * @throws IOException */ public FtpClientUtil upload(File file, String relativePath) throws IOException { FileInputStream fInputStream = new FileInputStream(file); return this.upload(fInputStream, file.getName(), relativePath, file.length()); } public FtpClientUtil upload(InputStream inputStream, String name, String relativePath, long localSize) throws IOException { ftp.setFileType(FTP.BINARY_FILE_TYPE); changeWorkingDirectory(relativePath); this.ftp.enterLocalPassiveMode(); FTPFile[] listFiles = this.ftp.listFiles(name); // long localSize = inputStream.available();// ? 不知道好用否 if (listFiles.length == 1) { long remoteSize = listFiles[0].getSize(); if (remoteSize == localSize) { this.setUploadStatus(UploadStatus.File_Exits); return this; } else if (remoteSize > localSize) { this.setUploadStatus(UploadStatus.Remote_Bigger_Local); return this; } this.uploadFile(inputStream, name, remoteSize, localSize); } else { this.uploadFile(inputStream, name, 0, localSize); } logger.info("{}/{} upload success", relativePath, name); return this; } private void uploadFile(InputStream inputStream, String name, long remoteSize, long localSize) throws IOException { this.ftp.enterLocalPassiveMode(); OutputStream output = null; long step = localSize / 100; long process = 0; long localreadbytes = 0L; try { if (remoteSize > 0) { output = this.ftp.appendFileStream(name); this.ftp.setRestartOffset(remoteSize); inputStream.skip(remoteSize); process = remoteSize / step; localreadbytes = remoteSize; } else { output = this.ftp.storeFileStream(name); } byte[] bytes = new byte[1024]; int c; while ((c = inputStream.read(bytes)) != -1) { output.write(bytes, 0, c); localreadbytes += c; if (localreadbytes / step >= process + 10) { process = localreadbytes / step; logger.info("文件【" + name + "】上传ftp进度汇报, process = " + process); } } logger.info("文件" + name + "上传ftp进度汇报, process = " + 100); output.flush(); inputStream.close(); output.close(); boolean result = this.ftp.completePendingCommand(); if (remoteSize > 0) { this.setUploadStatus( result ? UploadStatus.Upload_From_Break_Success : UploadStatus.Upload_From_Break_Failed); } else { this.setUploadStatus( result ? UploadStatus.Upload_New_File_Success : UploadStatus.Upload_New_File_Failed); } } catch (Exception e) { this.setUploadStatus( remoteSize > 0 ? UploadStatus.Upload_From_Break_Failed : UploadStatus.Upload_New_File_Failed); } } public OutputStream upload(String name, String relativePath) throws IOException { ftp.setFileType(FTP.BINARY_FILE_TYPE); changeWorkingDirectory(relativePath); ftp.enterLocalPassiveMode(); return this.ftp.storeFileStream(name); } public void changeWorkingDirectory(String relativePath) throws IOException { if (relativePath == null) { throw new NullPointerException("relativePath can't be null"); } String[] dirs = relativePath.split("/"); for (String dir : dirs) { if (!this.ftp.changeWorkingDirectory(dir)) { if (this.ftp.makeDirectory(dir)) { this.ftp.changeWorkingDirectory(dir); } else { logger.warn("{}目录创建失败, 导致不能进入合适的目录进行上传", dir); } } } } /** * ftp上传目录下所有文件的功能 * * @param file * 要上传的目录 * @param relativePath * 要上传到ftp服务器的相对路径 * @return * @throws IOException */ public FtpClientUtil uploadDir(File file, String relativePath) throws IOException { if (!file.isDirectory()) { throw new IllegalArgumentException("file argument is not a directory!"); } relativePath = relativePath + "/" + file.getName(); File[] listFiles = file.listFiles(); for (File f : listFiles) { this.uploadFree(f, relativePath); } return this; } /** * ftp上传文件, 调用方不用区分文件是否为目录，由该方法自己区分处理 * * @param file * 要上传的文件 * @param relativePath * 要上传到ftp服务器的相对路径 * @return * @throws IOException */ public FtpClientUtil uploadFree(File file, String relativePath) throws IOException { if (file.isDirectory()) { this.uploadDir(file, relativePath); } else { this.upload(file, relativePath); } return this; } /** * 本方法是上传的快捷方法，方法中自身包含了ftp 连接、登陆、上传、退出、断开各个步骤 * * @param file * 要上传的文件 * @param relativePath * 要上传到ftp服务器的相对路径 */ public boolean uploadOneStep(File file, String relativePath) { try { this.connect().login().uploadFree(file, relativePath); return true; } catch (IOException e) { String msg = String.format("ftp上传时发生异常, filename = [%s], relativePath = [%s]", file.getName(), relativePath); logger.error(msg, e); return false; } finally { this.disconnectFinally(); } } public boolean uploadOneStepForStream(InputStream inputStram, String name, String relativePath, long localSize) { try { this.connect().login().upload(inputStram, name, relativePath, localSize); return true; } catch (IOException e) { String msg = String.format("ftp上传时发生异常, filename = [%s], relativePath = [%s]", name, relativePath); logger.error(msg, e); return false; } finally { this.disconnectFinally(); } } public interface OutputStreamForUpload { public void write(OutputStream outputStream) throws IOException; } public boolean uploadOneStepForStream(OutputStreamForUpload outputUpload, String name, String relativePath) { try { this.connect().login(); OutputStream upload = this.upload(name, relativePath); outputUpload.write(upload); return true; } catch (IOException e) { String msg = String.format("ftp上传时发生异常, filename = [%s], relativePath = [%s]", name, relativePath); logger.error(msg, e); return false; } finally { this.disconnectFinally(); } } public FtpClientUtil logout() throws IOException { this.ftp.logout(); return this; } public void disconnect() { this.disconnectFinally(); } private void disconnectFinally() { if (this.ftp.isConnected()) { try { this.ftp.disconnect(); } catch (IOException ioe) { logger.warn("ftp断开服务器链接异常", ioe); } } } @Override public String toString() { return "FtpClientHelper [host=" + host + ", port=" + port + ", username=" + username + ", password=" + password + "]"; } }
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