sftp往linux ftp服务器上传数据备忘

前些日子做项目的时候，有个需求是在上传文件的时候将文件在linux的ftp服务器上备份一下，搜了下，sftp能实现，因此做了以下操作实现了该功能。

下面这是网上找个一个sftp的工具类，在上传方法中调用该工具类中的方法实现sftp服务的连接，以及文件的上传。

package com.xz.cxzy.utils;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.util.Properties;import java.util.Vector;import com.jcraft.jsch.Channel;import com.jcraft.jsch.ChannelSftp;import com.jcraft.jsch.JSch;import com.jcraft.jsch.Session;import com.jcraft.jsch.SftpException;public class SFTPUtil {/*** 连接sftp服务器* @param host 主机* @param port 端口* @param username 用户名* @param password 密码* @return*/public static ChannelSftp connect(String host, int port, String username,String password) {ChannelSftp sftp = null;try {JSch jsch = new JSch();jsch.getSession(username, host, port);Session sshSession = jsch.getSession(username, host, port);sshSession.setPassword(password);Properties sshConfig = new Properties();sshConfig.put("StrictHostKeyChecking", "no");sshSession.setConfig(sshConfig);sshSession.connect();Channel channel = sshSession.openChannel("sftp");channel.connect();sftp = (ChannelSftp) channel;System.out.println("Connected to " + host + ".");} catch (Exception e) {}return sftp;}/*** 上传文件* @param directory 上传的目录* @param uploadFile 要上传的文件* @param sftp*/public void upload(String directory, String uploadFile, ChannelSftp sftp) {try {sftp.cd(directory);File file=new File(uploadFile);sftp.put(new FileInputStream(file), file.getName());} catch (Exception e) {e.printStackTrace();}}public static void upload(String directory,InputStream inputStream, String fileName,ChannelSftp sftp) {try {sftp.cd(directory);sftp.put(inputStream,fileName);} catch (Exception e) {e.printStackTrace();}}/*** 下载文件* @param directory 下载目录* @param downloadFile 下载的文件* @param saveFile 存在本地的路径* @param sftp*/public void download(String directory, String downloadFile,String saveFile, ChannelSftp sftp) {try {sftp.cd(directory);File file=new File(saveFile);sftp.get(downloadFile, new FileOutputStream(file));} catch (Exception e) {e.printStackTrace();}}/*** 删除文件* @param directory 要删除文件所在目录* @param deleteFile 要删除的文件* @param sftp*/public static void delete(String directory, String deleteFile, ChannelSftp sftp) {try {sftp.cd(directory);sftp.rm(deleteFile);} catch (Exception e) {e.printStackTrace();}}/** * 关闭连接 * @param sftp */public static void disconnect(ChannelSftp sftp) {    if(sftp != null){        if(sftp.isConnected()){           sftp.disconnect();        }else if(sftp.isClosed()){            System.out.println("sftp is closed already");        }    }} /*** 列出目录下的文件* @param directory 要列出的目录* @param sftp* @return* @throws SftpException*/public Vector listFiles(String directory, ChannelSftp sftp) throws SftpException{return sftp.ls(directory);}public static void main(String[] args) {//10.184.16.98 root ylj2013SFTPUtil sf = new SFTPUtil(); String host = "liux服务器ip";int port = 22;String username = "root";String password = "root";String directory = "/u01/cxzyFiles/attach_upload/uploadfile/djzc/2013-12/";String uploadFile = "F:/tempfiles/2_201083103325.png";String downloadFile = "123.png";String saveFile = "F:/tempfiles/2_201083103325_download.png";String deleteFile = "b0e651d2-3cc9-4152-bb4c-d0b539cb7786.psd";ChannelSftp sftp=sf.connect(host, port, username, password);//sf.upload(directory, uploadFile, sftp);//sf.download(directory, downloadFile, saveFile, sftp);try{sf.delete(directory, deleteFile, sftp);disconnect(sftp);//sftp.cd(directory);//sftp.mkdir("ss");System.out.println("finished");}catch(Exception e){e.printStackTrace();} } }

下面是我项目中上传servlet中调用sftp的代码：

package com.xz.cxzy.controller;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.List;import java.util.UUID;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;import org.apache.commons.io.FilenameUtils;import org.apache.commons.lang.StringUtils;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;import com.jcraft.jsch.ChannelSftp;import com.xz.cxzy.bean.NewsAttach;import com.xz.cxzy.service.INewsAttachService;import com.xz.cxzy.utils.SFTPUtil;public class FileUploadServlet extends HttpServlet {private static final long serialVersionUID = -7825355637448948879L;private final String attachTempPath =  "/attach_upload/tempfile";private String attachUploadPath = "/attach_upload/uploadfile";private final String hostIp = "linux服务器ip";private final Integer hostPort = 22;private final String userName = "root";private final String password = "root";private final String hostDistinctDir = "/u01/cxzyFiles/attach_upload/uploadfile/";//往服务器指定目录写文件private boolean dirIsExists = true; private boolean typeDirExists = true;private String sftpSaveFileName = "";private String sftpUploadFileName = "";public FileUploadServlet() {super();}/**处理上传路径 * @return */private String getUpLoadPath(HttpServletRequest request,String dirType){//拼接类型String type = getActivedType(request,dirType);if(!attachUploadPath.contains(type))attachUploadPath = attachUploadPath+"/"+type;//拼接日期SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");String ym = sdf.format(new Date());if(!attachUploadPath.contains(ym))attachUploadPath = attachUploadPath +  "/" +ym;return attachUploadPath;}private String getActivedType(HttpServletRequest request,String dirType){//判断是属于哪个系统的上传  党建 or 外网管理String type = dirType;type = StringUtils.isNotBlank(type) ? type:"ylj";return type;}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request,response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext());INewsAttachService newsAttachService  = (INewsAttachService) context.getBean("newsAttachService");if(newsAttachService != null){DiskFileItemFactory factory = new DiskFileItemFactory();// 设置内存缓冲区，超过后写入临时文件factory.setSizeThreshold(10240000);// 设置临时文件存储位置String base = this.getServletContext().getRealPath("/")+attachTempPath;File file = new File(base);if(!file.exists())file.mkdirs();factory.setRepository(file);ServletFileUpload upload = new ServletFileUpload(factory);// 设置单个文件的最大上传值upload.setFileSizeMax(10002400000l);// 设置整个request的最大值upload.setSizeMax(10002400000l);upload.setHeaderEncoding("UTF-8");try {List<?> items = upload.parseRequest(request);FileItem item = null;//String fileName = null;String resourceId = "";String dirType_2 = "";for (int i = 0 ;i < items.size(); i++){item = (FileItem) items.get(i);//fileName = uploadPath + File.separator + item.getName();if(item.isFormField()){String name = item.getFieldName();if("news_id".equals(name)){resourceId = item.getString();}if("dirType_2".equals(name)){dirType_2 = item.getString();attachUploadPath = getUpLoadPath(request,dirType_2);//改变上传路径}}String uploadPath = this.getServletContext().getRealPath("/")+attachUploadPath;File ufile = new File(uploadPath);if(!ufile.exists()){ufile.mkdirs();}// 保存文件if (!item.isFormField() && item.getName().length() > 0) {String suffix = FilenameUtils.getExtension(item.getName());//文件后缀String saveFileName = StringUtils.join(new String[]{UUID.randomUUID().toString(), ".",suffix});String uploadFileName =  uploadPath + File.separator + saveFileName;if(StringUtils.isNotBlank(resourceId)){Integer r_id = Integer.parseInt(resourceId);NewsAttach attach = new NewsAttach();attach.setAttach_Name(item.getName());attach.setAttach_real_path(uploadFileName);attach.setResource_id(r_id);attach.setAttach_path(attachUploadPath+"/"+saveFileName);attach.setState("1");newsAttachService.save(attach);//往项目指定位置写文件item.write(new File(uploadFileName));sftpSaveFileName = saveFileName;sftpUploadFileName = uploadFileName;final String active_type = getActivedType(request,dirType_2);new Thread(){public void run() {try {//通过sftp方式往服务器指定目录写文件ChannelSftp sftp = SFTPUtil.connect(hostIp, hostPort, userName, password);if(sftp != null){sftp.cd(hostDistinctDir);//创建类型文件夹try {sftp.cd(active_type);} catch (Exception e) {typeDirExists = false;}if(!typeDirExists){sftp.mkdir(active_type);typeDirExists = true;sftp.cd(active_type);}//创建日期文件夹SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");String ym = sdf.format(new Date());try {sftp.cd(ym);} catch (Exception e) {//出现异常说明文件在服务器上不存在dirIsExists = false;}if(!dirIsExists) {sftp.mkdir(ym);dirIsExists = true;}SFTPUtil.upload(hostDistinctDir+active_type+"/"+ym, new FileInputStream(new File(sftpUploadFileName)), sftpSaveFileName, sftp);SFTPUtil.disconnect(sftp);}} catch (Exception e) {e.printStackTrace();}};}.start();}}}} catch (FileUploadException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}}}}

在FileUploadServlet 中，我是专门开了一个线程来处理sftp的文件上传。