Java连接FTP服务器并使用ftp连接池进行文件操作指南
目录
- 前言
- 1、导入Pom依赖
- 2、创建FTP的配置
- 3、创建FTP配置类
- 4、创建工厂连接对象并注入配置
- 5、创建客户端对象service接口
- 6、创建FTP接口实现类
- 7、FTP工具类
- 总结
前言
使用Java连接FTP服务器进行文件相关操作,并且使用FTP连接池降低资源消耗,提高响应速率。
1、导入Pom依赖
<!-- https://mvnrepository.com/artifact/commons-net/commons-net --> <dependency> <groupId>commons-net</groupId> <artifactId>commons-net</artifactId> <version>3.9.0</version> </dependency>
2、创建FTP的配置
ftp: # 服务器地址 host: xx.xxx.xx.xxx # 端口号 port: 21 # 用户名 userName: xxx # 密码 password: xxxxxxx # 工作目录 workingDirectory: /ftpTest # 编码 encoding: utf-8 #被动模式 passiveMode: true #连接超时时间 clientTimeout: 30000 # 线程数 threaNum: 1 # 0=ASCII_FILE_TYPE(ASCII格式),1=EBCDIC_FILE_TYPE,2=LOCAL_FILE_TYPE(二进制文件) transferFileType: 2 # 是否重命名 renameUploaded: true # 重新连接时间 retryTimes: 1200 # 缓存大小 bufferSize: 8192 # 最大数 maxTotal: 50 # 最小空闲 minldle: 10 # 最大空闲 maxldle: 50 # 最大等待时间 maxWait: 30000 # 池对象耗尽之后是否阻塞,maxWait < 0 时一直等待 blockWhenExhausted: true # 取对象时验证 testOnBorrow: true # 回收验证 testOnReturn: true # 创建时验证 testOnCreate: true # 空闲验证 testWhileldle: false # 后进先出 lifo: false
3、创建FTP配置类
import lombok.Getter; import lombok.Setter; import org.apache.commons.pool2.impl.GenericObjectPoolConfig; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.Configuration; import org.apache.commons.net.ftp.FTPClient; /** * Ftp配置类 */ @Configuration @ConfigurationProperties(prefix = "ftp") @Getter @Setter public class FtpConfig extends GenericObjectPoolConfig<FTPClient> { /** * FTP服务器地址 */ private String host; /** * FTP服务器端口 */ private Integer port; /** * FTP用户名 */ private String userName; /** * FTP密码 */ private String password; /** * FTP服务器根目录 */ private String workingDirectory; /** * 传输编码 */ String encoding; /** * 被动模式:在这种模式下,数据连接是由客户程序发起的 */ boolean passiveMode; /** * 连接超时时间 */ int clientTimeout; /** * 线程数 */ int threaNum; /** * 0=ASCII_FILE_TYPE(ASCII格式),1=EBCDIC_FILE_TYPE,2=LOCAL_FILE_TYPE(二进制文件) */ int transferFileType; /** * 是否重命名 */ boolean renameUploaded; /** * 重新连接时间 */ int retryTimes; /** * 缓存大小 */ int bufferSize; /** * 最大数 */ int maxTotal; /** * 最小空闲 */ int minldle; /** * 最大空闲 */ int maxldle; /** * 最大等待时间 */ int maxWait; /** * 池对象耗尽之后是否阻塞,maxWait < 0 时一直等待 */ boolean blockWhenExhausted; /** * 取对象时验证 */ boolean testOnBorrow; /** * 回收验证 */ boolean testOnReturn; /** * 创建时验证 */ boolean testOnCreate; /** * 空闲验证 */ boolean testWhileldle; /** * 后进先出 */ boolean lifo; }
4、创建工厂连接对象并注入配置
import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang3.StringUtils; import org.apache.commons.net.ftp.FTP; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPReply; import org.apache.commons.pool2.PooledObject; import org.apache.commons.pool2.PooledObjectFactory; import org.apache.commons.pool2.impl.DefaultPooledObject; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; /** * FtpClient 工厂连接对象 */ @Component @Slf4j public class FTPClientFactory implements PooledObjectFactory<FTPClient> { /** * 注入 ftp 连接配置 */ @Autowired FtpConfig config; /** * 创建连接到池中 * * @return * @throws Exception */ @Override public PooledObject<FTPClient> makeObject() throws Exception { FTPClient ftpClient = new FTPClient(); ftpClient.setConnectTimeout(config.getClientTimeout()); ftpClient.connect(config.getHost(), config.getPort()); int reply = ftpClient.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) { ftpClient.disconnect(); return null; } boolean success; if (StringUtils.isBlank(config.getUserName())) { success = ftpClient.login("anonymous", "anonymous"); } else { success = ftpClient.login(config.getUserName(), config.getPassword()); } if (!success) { return null; } ftpClient.setFileType(config.getTransferFileType()); ftpClient.setBufferSize(1024); ftpClient.setControlEncoding(config.getEncoding()); if (config.isPassiveMode()) { ftpClient.enterLocalPassiveMode(); } log.debug("创建ftp连接"); return new DefaultPooledObject<>(ftpClient); } /** * 链接状态检查 * * @param pool * @return */ @Override public boolean validateObject(PooledObject<FTPClient> pool) { FTPClient ftpClient = pool.getObject(); try { return ftpClient != null && ftpClient.sendNoOp(); } catch (Exception e) { return false; } } /** * 销毁连接,当连接池空闲数量达到上限时,调用此方法销毁连接 * * @param pool * @throws Exception */ @Override public void destroyObject(PooledObject<FTPClient> pool) throws Exception { FTPClient ftpClient = pool.getObject(); if (ftpClient != null) { try { ftpClient.disconnect(); log.debug("销毁ftp连接"); } catch (Exception e) { log.error("销毁ftpClient异常,error:", e.编程客栈getMessage()); } } } /** * 钝化连接,是连接变为可用状态 * * @param p * @throws Exception */ @Override public void passivateObject(PooledObject<FTPClient> p) throws Exception{ FTPClient ftpClient = p.getObject(); try { ftpClient.changeWorkingDirectory(config.getWorkingDirectory()); ftpClient.logout(); if (ftpClient.isConnected()) { ftpClient.disconnect(); } } catch (Exception e) { throw new RuntimeException("Could not disconnect from server.", e); } } /** * 初始化连接 * * @param pool * @throws Exception */ @Override public void activateObject(PooledObject<FTPClient> pool) throws Exception { FTPClient ftpClient = pool.getObject(); ftpClient.connect(config.getHost(),config.getPort()); ftpClient.login(config.getUserName(), config.getPassword()); ftpClient.setControlEncoding(config.getEncoding()); ftpClient.changeWorkingDirectory(config.getWorkingDirectory()); //设置上传文件类型为二进制,否则将无法打开文件 ftpClient.setFileType(FTP.BINARY_FILE_TYPE); } /** * 获取 FTP 连接配置 * @return */ public FtpConfig getConfig(){ return config; } }
5、创建客户端对象service接口
import com.aicut.monitor.config.FtpConfig; import org.apache.commons.net.ftp.FTPClient; /** * 获取 ftp 客户端对象的接口 */ public interface FTPPoolService { /** * 获取ftpClient * @return */ FTPClient borrowObject(); /** * 归还ftpClient * @param ftpClient * @return */ void returnObject(FTPClient ftpClient); /** * 获取 ftp 配置信息 * @return */ FtpConfig getFtpPoolConfig(); }
6、创建FTP接口实现类
import com.aicut.monitor.config.FTPClientFactory; import com.aicut.monitor.config.FtpConfig; import com.aicut.monitor.service.FTPPoolService; import lombok.extern.slf4j.Slf4j; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.pool2.impl.GenericObjectPool; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import javax.annotation.PostConstruct; @Component @Slf4j public class FTPPoolServiceImpl implements FTPPoolService { /** * ftp 连接池生成 */ private GenericObjectPool<FTPClient> pool; /** * ftp 客户端配置文件 */ @Autowired private FtpConfig config; /** * ftp 客户端工厂 */ @Autowired private FTPClientFactory factory; /** * 初始化pool */ @PostConstruct private void initPool() { this.pool = new GenericObjectPool<FTPClient>(this.factory, this.config); } /** * 获取ftpClient */ @Override public FTPClient borrowObject() { if (this.pool != null) { try { return this.pool.borrowObject(); } catch (Exception e) { log.error("获取 FTPClient 失败 ", e); } } return null; } /** * 归还 ftpClient */ @Override public void returnObject(FTPClient ftpClient) { if (this.pool != null && ftpClient != null) { this.pool.returnObject(ftpClient); } } @Override public FtpConfig getFtpPoolConfig() { return config; } }
7、FTP工具类
import cn.hutool.core.util.CharsetUtil; import com.aicut.monitor.enums.DownloadStatus; import com.aicut.monitor.enums.UploadStatus; import com.aicut.monitor.enums.uploadImageType; import com.aicut.monitor.service.FTPPoolService; import lombok.extern.slf4j.Slf4j; import org.apache.commons.compress.archivers.zip.ParallelScatterZipCreator; import org.apache.commons.compress.archivers.zip.UnixStat; import org.apache.commons.compress.archivers.zip.ZipArchiveEntry; import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream; import org.apache.commons.compress.parallel.InputStreamSupplier; import org.apache.commons.io.IOUtils; import org.apache.commons.io.input.NullInputStream; import org.apache.commons.net.ftp.FTP; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPFile; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.net.URLEncoder; import java.nio.file.Files; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Arrays; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.concurrent.ExecutorService; import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; import java.util.stream.Collectors; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; /** * FTP工具类 * * @author YJ2023085043 */ @Component @Slf4j public class FtpUtil { /** * ftp 连接池 */ @Autowired FTPPoolService ftpPoolService; public static final String DIR_SPLIT = "/"; public static final String HTTP_protocol = "http://"; /** * 上传单个文件 * * @param uploadPath 上传路径 * @param fileName 文件名 * @param input 文件输入流 * @return 上传结果 */ public UploadStatus upload(String uploadPath, String fileName, InputStream input) { FTPClient ftpClient = ftpPoolService.borrowObject(); try { // 切换到工作目录 if (!ftpClient.changeWorkingDirectory(uploadPath)) { ftpClient.makeDirectory(uploadPath); ftpClient.changeWorkingDirectory(uploadPath); } // 文件写入 boolean storeFile = ftpClient.storeFile(fileName, input); if (storeFile) { log.info("文件:{}上传成功", fileName); return UploadStatus.UploadNewFileSuccess; } else { throw new RuntimeException("ftp文件写入异常"); } } catch (IOException e) { log.error("文件:{}上传失败", fileName, e); return UploadStatus.UploadNewFileFailed; } finally { IOUtils.closeQuietly(input); ftpPoolService.returnObject(ftpClient); } } /** * 从FTP服务器上下载文件,支持断点续传,下载百分比汇报 * * @param ftpPath 远程文件路径 * @param fileName 远程文件名 * @param local 本地文件完整绝对路径 * @return 下载的状态 * @throws IOException */ public DownloadStatus downloadFile(String ftpPath, String fileName, String local) throws IOException { FTPClient ftpClient = ftpPoolService.borrowObject(); // 设置被动模式,由于linux安全性考虑,端口没有全部放开,所有被动模式不能用 ftpClient.enterLocalPassiveMode(); // 设置以二进制方式传输 ftpClient.setFileType(FTP.BINARY_FILE_TYPE); DownloadStatus result; try { // 检查远程文件是否存在 FTPFile[] files = ftpClient.listFiles(ftpPath,file -> file.getName().equals(fileName)); if (files.length != 1) { log.info("远程文件不存在"); return DownloadStatus.RemoteFileNotExist; } long lRemoteSize = files[0].getSize(); File f = new File(local+DIR_SPLIT+fileName); // 本地存在文件,进行断点下载 if (f.exists()) { long localSize = f.length(); // 判断本地文件大小是否大于远程文件大小 if (localSize >= lRemoteSize) { log.info("本地文件大于远程文件,下载中止"); return DownloadStatus.LocalFileBiggerThanRemoteFile; } // 进行断点续传,并记录状态 FileOutputStream out = new FileOutputStream(f, true); ftpClient.setRestartOffset(localSize); InputStream in = ftpClient.retrieveFileStream(ftpPath + DIR_SPLIT + fileName); byte[] bytes = new byte[1024]; long step = lRemoteSize / 100; // 文件过小,step可能为0 step = step == 0 ? 1 : step; long process = localSize / step; int c; while ((c = in.read(bytes)) != -1) { out.write(bytes, 0, c); localSize += c; long nowprocess = localSize / step; if (nowProcess > process) { process = nowProcess; if (process % 10 == 0) { log.info("下载进度:" + process); } } } in.close(); out.close(); boolean isDo = ftpClient.completePendingCommand(); if (isDo) { result = DownloadStatus.DownloadFromBreakSuccess; } else { result = DownloadStatus.DownloadFromBreakFailed; } } else { OutputStream out = new FileOutputStream(f); InputStream in = ftpClient.retrieveFileStream(ftpPath + DIR_SPLIT + fileName); byte[] bytes = new byte[1024]; long step = lRemoteSize / 100; // 文件过小,step可能为0 step = step == 0 ? 1 : step; long process = 0; long localSize = 0L; int c; while ((c = in.read(bytes)) != -1) { out.write(bytes, 0, c); localSize += c; long nowProcess = localSize / step; if (nowProcess > process) { process = nowProcess; if (process % 10 == 0) { log.info("下载进度:" + process); } } } in.close(); out.close(); boolean upNewStatus = ftpClient.completePendingCommand(); if (upNewStatus) { result = DownloadStatus.DownloadNewSuccess; } else { result = DownloadStatus.DownloadNewFailed; } } } catch (Exception e) { log.error("download error", e); } finally { ftpPoolService.returnObject(ftpClient); } return DownloadStatus.DownloadNewFailed; } /** * 下载文件到本地 * * * @param ftpPath FTP服务器文件目录 * * @param ftpFileName 文件名称 * * @param localPath 下载后的文件路径 * * @return */ public boolean download(String ftpPath, String ftpFileName, String localPath) { FTPClient ftpClient = ftpPoolService.borrowObject(); OutputStream outputStream = null; try { FTPFile[] ftpFiles = ftpClient.listFiles(ftpPath, file -> file.isFile() && file.getName().equals(ftpFileName)); if (ftpFiles != null && ftpFiles.length > 0) { FTPFile ftpFile = ftpFiles[0]; File localFile = new File(localPath + DIR_SPLIT + ftpFile.getName()); // 判断本地路径目录是否存在,不存在则创建 if (!localFile.getParentFile().exists()) { localFile.getParentFile().mkdirs(); } outputStream = Files.newOutputStream(localFile.toPath()); ftpClient.retrieveFile(ftpFile.getName(), outputStream); log.info("fileName:{},size:{}", ftpFile.getName(), ftpFile.getSize()); log.info("下载文件成功..."); return true; } else { log.info("文件不存在,filePathname:{},", ftpPath + DIR_SPLIT + ftpFileName); } } catch (Exception e) { log.error("下载文件失败...",e); } finally { IOUtils.closeQuietly(outputStream); ftpPoolService.returnObject(ftpClient); } return false; } /** * 下载文件到浏览器 * * * @param ftpPath FTP服务器文件目录 * * @param ftpFileName 文件名称 * * @param response * @return */ public void download(HttpServletResponse response, String ftpPath, String ftpFileName) { FTPClient ftpClient = ftpPoolService.borrowObject(); OutputStream outputStream = null; try { FTPFile[] ftpFiles = ftpClient.listFiles(ftpPath, file -> file.isFile() && file.getName().equals(ftpFileName)); response.setContentType("application/octet-stream"); response.setCharacterEncoding("utf8"); response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(ftpFileName,"UTF-8") ); outputStream = response.getOutputStream(); if (ftpFiles != null && ftpFiles.length > 0) { FTPFile ftpFile = ftpFiles[0]; ftpClient.retrieveFile(ftpPath+DIR_SPLIT+ftpFile.getName(), outputStream); log.info("fileName:{},size:{}", ftpFile.getName(), ftpFile.getSize()); log.info("下载文件成功..."); } else { log.info("文件不存在,filePathname:{},", ftpPath + DIR_SPLIT + ftpFileName); } } catch (Exception e) { log.error("下载文件失败...",e); } finally { IOUtils.closeQuietly(outputStream); ftpPoolService.returnObject(ftpClient); } } public void ftpZipFileDownload (HttpServletResponse response,String ftpPath) { //从FTP上下载文件并打成ZIP包给用户下载 ZipOutputStream zipOut = null; try { //文件名称 String zipFileName = "导出数据.zip"; response.reset(); // 设置导出文件头 response.setContentType("application/octet-stream"); response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(zipFileName,"UTF-8") ); // 定义Zip输出流 zipOut = new ZipOutputStream(response.getOutputStream()); zipFTPFile(ftpPath,zipOut,""); } catch (IOException e) { log.error("当前:"+ftpPath+"下载FTP文件--->下载文件失败:"+e.getMessage()); } finally { // 关闭zip文件输出流 if (null != zipOut) { try { zipOut.closeEntry(); zipOut.close(); } catch (IOException e) { log.error("当前:"+ftpPath+"下载FTP文件--->关闭zip文件输出流出错:"+e.getMessage()); } } } } public void zipFTPFile(String ftpPath, ZipOutputStream zipOut,String foldPath){ FTPClient ftpClient = ftpPoolService.borrowObject(); try { // 切换到指定目录中,如果切换失败说明目录不存在 if(!ftpClient.changeWorkingDirectory(ftpPath)){ log.error("切换目录失败"); throw new RuntimeException("切换目录失败"); } // 每次数据连接之前,ftp client告诉ftp server开通一个端口来传输数据 ftpClient.enterLocalPassiveMode(); // 遍历路径下的所有文件 FTPFile[] fileList = ftpClient.listFiles(); byte[] byteReader = new byte[1024]; ByteArrayOutputStream os = null; for (FTPFile tempFile : fileList) { if (tempFile.isFile()) { os = new ByteArrayOutputStream(); // 从FTP上下载downFileName该文件把该文件转化为字节数组的输出流 ftpClient.retrieveFile(tempFile.getName(), os); byte[] bytes = os.toByteArray(); InputStream ins = new ByteArrayInputStream(bytes); int len; zipOut.putNextEntry(new ZipEntry(foldPath + tempFile.getName())); // 读入需要下载的文件的内容,打包到zip文件 while ((len = ins.read(byteReader)) > 0) { zipOut.write(byteReader, 0, len); } }else{ //如果是文件夹,则递归调用该方法 zipOut.putNextEntry(new ZipEntry(tempFile.getName() + DIR_SPLIT)); zipFTPFile(ftpPath + DIR_SPLIT + tempFile.getName(), zipOut, tempFile.getName() + DIR_SPLIT); } } zipOut.flush(); } catch (IOException e) { e.printStackTrace(); } finally { ftpPoolService.returnObject(ftpClient); } } /** * 得到某个目录下的文件名列表 * * @param f编程客栈tpDirPath FTP上的目标文件路径 * @return * @throws IOException */ public List<String> getFileList(String ftpDirPath) { FTPClient ftpClient = ftpPoolService.borrowObject(); try { FTPFile[] ftpFiles = ftpClient.listFiles(ftpDirPath); if (ftpFiles != null && ftpFiles.length > 0) { return Arrays.stream(ftpFiles).map(FTPFile::getName).collect(Collectors.toList()); } log.error(String.format("路径有误,或目录【%s】为空", ftpDirPath)); } catch (Exception e) { log.error("获取目录下文件列表失败", e); } finally { ftpPoolService.returnObject(ftpClient); } return null; } /** * 删除文件 * * @param ftpPath 服务器文件存储路径 * @param fileName 文件名 * @return * @throws IOException */ public boolean deleteFile(String ftpPath, String fileName) { FTPClient ftpClient = ftpPoolService.borrowObject(); try { // 在 ftp 目录下获取文件名与 fileName 匹配的文件信息 FTPFile[] ftpFiles = ftpClient.listFiles(ftpPath, file -> file.getName().equals(fileName)); // 删除文件 if (ftpFiles != null && ftpFiles.length > 0) { boolean del; String deleteFilePath = ftpPath + DIR_SPLIT + fileName; 编程客栈 FTPFile ftpFile = ftpFiles[0]; if (ftpFile.isDirectory()) { //递归删除该目录下的所有文件后删除目录 FTPFile[] files = ftpClient.listFiles(ftpPath + DIR_SPLIT + fileName); for (FTPFile file : files) { if(file.isDirectory()){ deleteFile(ftpPath + DIR_SPLIT + fileName,file.getName()); }else{ del = ftpClient.deleteFile(deleteFilePath + DIR_SPLIT + file.getName()); log.info(del ? "文件:{}删除成功" : "文件:{}删除失败", file.getName()); } } del = ftpClient.removeDirectory(deleteFilePath); } else { del = ftpClient.deleteFile(deleteFilePath); } log.info(del ? "文件:{}删除成功" : "文件:{}删除失败", fileName); return del; } else { log.warn("文件:{}未找到", fileName); } } catch (IOException e) { e.printStackTrace(); } finally { ftpPoolService.returnObject(ftpClient); } return false; } /** * 上传文件到FTP服务器,支持断点续传 * @param uploadPath 远程文件存放路径 * @param fileName 上传文件名 * @param input 文件输入流 * @return 上传结果 * @throws IOException */ public UploadStatus uploadFile(String uploadPath, String fileName, InputStream input) { FTPClient ftpClient = ftpPoolService.borrowObject(); UploadStatus result = UploadStatus.UploadNewFileFailed; try { // 设置PassiveMode传输 ftpClient.enterLocalPassiveMode(); // 设置以二进制流的方式传输 ftpClient.setFileType(FTP.BINARY_FILE_TYPE); ftpClient.setControlEncoding(CharsetUtil.UTF_8); //切换到工作目录 if(!ftpClient.changeWorkingDirectory(uploadPath)){ ftpClient.makeDirectory(uploadPath); ftpClient.changeWorkingDirectory(uploadPath); } // 检查远程是否存在文件 FTPFile[] files = ftpClient.listFiles(uploadPath,file -> file.getName().equals(fileName)); if (files.length == 1) { long remoteSize = files[0].getSize(); //根据文件输入流获取文件对象 File f = getFileFromInputStream(input); long localSize = f.length(); // 文件存在 if (remoteSize == localSize) { return UploadStatus.FileExits; } else if (remoteSize > localSize) { return UploadStatus.RemoteFileBiggerThanLocalFile; } // 尝试移动文件内读取指针,实现断点续传 result = uploadFile(fileName, f, ftpClient, remoteSize); // 如果断点续传没有成功,则删除服务器上文件,重新上传 if (result == UploadStatus.UploadFromBreakFailed) { if (!ftpClient.deleteFile(fileName)) { return UploadStatus.DeleteRemoteFaild; } result = uploadFile(fileName, f, ftpClient, 0); } } else { result = uploadFile(fileName, getFileFromInputStream(input), ftpClient, 0); } } catch (Exception e) { log.error("上传文件失败", e); } finally { ftpPoolService.returnObject(ftpClient); } return result; } /** * 从输入流中获取文件对象 * @param inputStream * @return */ public static File getFileFromInputStream(InputStream inputStream) { File file = null; try { // 创建临时文件 file = File.createTempFile("temp", null); // 将输入流写入临时文件 byte[] buffer = new byte[1024]; int bytesRead; try (FileOutputStream outputStream = new FileOutputStream(file)) { while ((bytesRead = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, bytesRead); } } } catch (IOException e) { e.printStackTrace(); } return file; } /** * 递归创建远程服务器目录 * * @param remote 远程服务器文件绝对路径 * @param ftpClient FTPClient对象 * @return 目录创建是否成功 * @throws IOException */ public UploadStatus createDirectory(String remote, FTPClient ftpClient) throws IOException { UploadStatus status = UploadStatus.CreateDirectorySuccess; String directory = remote.substring(0, remote.lastIndexOf("/") + 1); if (!directory.equalsIgnoreCase("/") && !ftpClient.changeWorkingDirectory(new String(directory.getBytes(CharsetUtil.UTF_8), CharsetUtil.ISO_8859_1))) { // 如果远程目录不存在,则递归创建远程服务器目录 int start = 0; int end = 0; if (directory.startsWith("/")) { start = 1; } else { start = 0; } end = directory.indexOf("/", start); while (true) { String subDirectory = new String(remote.substring(start, end).getBytes(CharsetUtil.UTF_8), CharsetUtil.ISO_8859_1); if (!ftpClient.changeWorkingDirectory(subDirectory)) { if (ftpClient.makeDirectory(subDirectory)) { ftpClient.changeWorkingDirectory(subDirectory); } else { log.info("创建目录失败"); return UploadStatus.CreateDirectoryFail; } } start = end + 1; end = directory.indexOf("/", start); // 检查所有目录是否创建完毕 if (end <= start) { break; } } } return status; } /** * 上传文件到服务器,新上传和断点续传 * * @param remoteFileName 远程文件名,在上传之前已经将服务器工作目录做了改变,一定要注www.devze.com意这里的 remoteFile 已经别被编码 ISO-8859-1 * @param localFile 本地文件File句柄,绝对路径 * @param ftpClient FTPClient引用 * @return * @throws IOException */ public UploadStatus uploadFile(String remoteFileName, File localFile, FTPClient ftpClient, long remoteSize) { if (null == ftpClient) { ftpClient = ftpPoolService.borrowObject(); } if (null == ftpClient) { return null; } UploadStatus status = UploadStatus.UploadNewFileFailed; try (RandomAccessFile raf = new RandoMACcessFile(localFile, "r"); OutputStream out = ftpClient.appendFileStream(remoteFileName);) { // 显示进度的上传 log.info("localFile.length():" + localFile.length()); long step = localFile.length() / 100; // 文件过小,step可能为0 step = step == 0 ? 1 : step; long process = 0; long localreadbytes = 0L; // 断点续传 if (remoteSize > 0) { ftpClient.setRestartOffset(remoteSize); process = remoteSize / step; raf.seek(remoteSize); localreadbytes = remoteSize; } byte[] bytes = new byte[1024]; int c; while ((c = raf.read(bytes)) != -1) { out.write(bytes, 0, c); localreadbytes += c; if (localreadbytes / step != process) { process = localreadbytes / step; if (process % 10 == 0) { log.info("上传进度:" + process); } } } out.flush(); raf.close(); out.close(); // FTPUtil的upload方法在执行ftpClient.completePendingCommand()之前应该先关闭OutputStream,否则主线程会在这里卡死执行不下去。 // 原因是completePendingCommand()会一直在等FTP Server返回226 Transfer complete,但是FTP Server只有在接受到OutputStream执行close方法时,才会返回。 boolean result = ftpClient.completePendingCommand(); if (remoteSize > 0) { status = result ? UploadStatus.UploadFromBreakSuccess : UploadStatus.UploadFromBreakFailed; } else { status = result ? UploadStatus.UploadNewFileSuccess : UploadStatus.UploadNewFileFailed; } } catch (Exception e) { log.error("uploadFile error ", e); } return status; } /** * 获取FTP某一特定目录下的文件数量 * * @param ftpDirPath FTP上的目标文件路径 */ public Integer getFileNum(String ftpDirPath) { FTPClient ftpClient = ftpPoolService.borrowObject(); try { FTPFile[] ftpFiles = ftpClient.listFiles(ftpDirPath); if (ftpFiles != null && ftpFiles.length > 0) { return Arrays.stream(ftpFiles).map(FTPFile::getName).collect(Collectors.toList()).size(); } log.error(String.format("路径有误,或目录【%s】为空", ftpDirPath)); } catch (IOException e) { log.error("文件获取异常:", e); } finally { ftpPoolService.returnObject(ftpClient); } return null; } /** * 获取文件夹下文件数量 * @param ftpPath * @return */ public Map<String,String> getDirFileNum(String ftpPath) { FTPClient ftpClient = ftpPoolService.borrowObject(); try { Integer sum = 0; Map<String,String> map = new HashMap<>(); FTPFile[] ftpFiles = ftpClient.listFiles(ftpPath); if (ftpFiles != null && ftpFiles.length > 0) { for (FTPFile file : ftpFiles) { if (file.isDirectory()) { sum += getFileNum(ftpPath + DIR_SPLIT + file.getName()); map.put(file.getName(), String.valueOf(getFileNum(ftpPath + DIR_SPLIT + file.getName()))); } } }else { log.error(String.format("路径有误,或目录【%s】为空", ftpPath)); } map.put("sum", String.valueOf(sum)); return map; } catch (IOException e) { log.error("文件获取异常:", e); } finally { ftpPoolService.returnObject(ftpClient); } return null; } /** * 下载指定文件夹到本地 * @param ftpPath FTP服务器文件目录 * @param localPath 下载后的文件路径 * @param dirName 文件夹名称 * @return */ public void downloadDir(String ftpPath, String localPath, String dirName){ FTPClient ftpClient = ftpPoolService.borrowObject(); OutputStream outputStream = null; try { //判断是否存在该文件夹 FTPFile[] ftpFiles = ftpClient.listFiles(ftpPath, file -> file.getName().equals(dirName)); if (ftpFiles != null && ftpFiles.length > 0) { if(ftpFiles[0].isDirectory()) { // 判断本地路径目录是否存在,不存在则创建 File localFile = new File(localPath + DIR_SPLIT + dirName); if (!localFile.exists()) { localFile.mkdirs(); } for (FTPFile file : ftpClient.listFiles(ftpPath + DIR_SPLIT + dirName)) { if (file.isDirectory()) { downloadDir(ftpPath + DIR_SPLIT + dirName, localPath + dirName + DIR_SPLIT, file.getName()); } else { outputStream = Files.newOutputStream(new File(localPath + DIR_SPLIT + dirName + DIR_SPLIT + file.getName()).toPath()); ftpC编程客栈lient.retrieveFile(ftpPath + DIR_SPLIT + dirName + DIR_SPLIT + file.getName(), outputStream); log.info("fileName:{},size:{}", file.getName(), file.getSize()); outputStream.close(); } } } } }catch (Exception e){ log.error("下载文件夹失败,filePathname:{},", ftpPath + DIR_SPLIT + dirName, e); }finally { IOUtils.closeQuietly(outputStream); ftpPoolService.returnObject(ftpClient); } } /** * 从本地上传文件夹 * @param uploadPath ftp服务器地址 * @param localPath 本地文件夹地址 * @param dirName 文件夹名称 * @return */ public boolean uploadDir(String uploadPath, String localPath, String dirName){ FTPClient ftpClient = ftpPoolService.borrowObject(); try{ // 切换到工作目录 if (!ftpClient.changeWorkingDirectory(uploadPath)) { ftpClient.makeDirectory(uploadPath); ftpClient.changeWorkingDirectory(uploadPath); } //创建文件夹 ftpClient.makeDirectory(uploadPath + DIR_SPLIT + dirName); File src = new File(localPath); //获取该目录下的所有文件 File[] files = src.listFiles(); FileInputStream input = null; for(File file : files) { if (file.isDirectory()) { uploadDir(uploadPath + DIR_SPLIT + dirName, file.getAbsolutePath(), file.getName()); } else { input = new FileInputStream(file); boolean storeFile = ftpClient.storeFile(uploadPath + DIR_SPLIT + dirName + DIR_SPLIT + file.getName(), input); if (storeFile) { log.info("文件:{}上传成功", file.getName()); } else { throw new RuntimeException("ftp文件写入异常"); } } } if(input != null){ input.close(); } }catch (Exception e){ log.error("文件夹上传失败",e); }finally { ftpPoolService.returnObject(ftpClient); } return false; } }
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