sftp方式下载、上传、删除
注意：在实际使用中，如果SFTP有中文名件名，部分LINUX系统会出现报错情况，找不到文件 No such file
// 可利用反射修改版本编号，从而可修改编码，解决中文文件名不能下载的问题
Class cl = ChannelSftp.class;
Field field = cl.getDeclaredField(“server_version”);
field.setAccessible(true);
field.set(sftp, 2);
sftp.setFilenameEncoding(“GBK”);
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.Vector;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;
/**
* 类说明 sftp工具类
*/
public class SFTPUtil {
private transient Logger log = LoggerFactory.getLogger(this.getClass());
private ChannelSftp sftp;
private Session session;
/** SFTP 登录用户名*/
private String username;
/** SFTP 登录密码*/
private String password;
/** 私钥 */
private String privateKey;
/** SFTP 服务器地址IP地址*/
private String host;
/** SFTP 端口*/
private int port;
/**
* 构造基于密码认证的sftp对象
*/
public SFTPUtil(String username, String password, String host, int port) {
this.username = username;
this.password = password;
this.host = host;
this.port = port;
}
/**
* 构造基于秘钥认证的sftp对象
*/
public SFTPUtil(String username, String host, int port, String privateKey) {
this.username = username;
this.host = host;
this.port = port;
this.privateKey = privateKey;
}
public SFTPUtil(){}
/**
* 连接sftp服务器
*/
public void login(){
try {
JSch jsch = new JSch();
if (privateKey != null) {
jsch.addIdentity(privateKey);// 设置私钥
}
session = jsch.getSession(username, host, port);
if (password != null) {
session.setPassword(password);
}
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
Channel channel = session.openChannel("sftp");
channel.connect();
sftp = (ChannelSftp) channel;
} catch (JSchException e) {
e.printStackTrace();
}
}
/**
* 关闭连接 server
*/
public void logout(){
if (sftp != null) {
if (sftp.isConnected()) {
sftp.disconnect();
}
}
if (session != null) {
if (session.isConnected()) {
session.disconnect();
}
}
}
/**
* 将输入流的数据上传到sftp作为文件。文件完整路径=basePath+directory
* @param basePath 服务器的基础路径
* @param directory 上传到该目录
* @param sftpFileName sftp端文件名
* @param input 输入流
*/
public void upload(String basePath,String directory, String sftpFileName, InputStream input) throws SftpException{
try {
sftp.cd(basePath);
sftp.cd(directory);
} catch (SftpException e) {
//目录不存在，则创建文件夹
String [] dirs=directory.split("/");
String tempPath=basePath;
for(String dir:dirs){
if(null== dir || "".equals(dir)) continue;
tempPath+="/"+dir;
try{
sftp.cd(tempPath);
}catch(SftpException ex){
sftp.mkdir(tempPath);
sftp.cd(tempPath);
}
}
}
sftp.put(input, sftpFileName); //上传文件
}
/**
* 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
*/
public void download(String directory, String downloadFile, String saveFile) throws SftpException, FileNotFoundException{
if (directory != null && !"".equals(directory)) {
sftp.cd(directory);
}
File file = new File(saveFile);
sftp.get(downloadFile, new FileOutputStream(file));
}
/**
* 下载文件
* @param directory 下载目录
* @param downloadFile 下载的文件名
* @return 字节数组
*/
public byte[] download(String directory, String downloadFile) throws SftpException, IOException{
if (directory != null && !"".equals(directory)) {
sftp.cd(directory);
}
InputStream is = null;
try {
is = sftp.get(downloadFile);
} catch (Exception e) {
log.error("SftpUtil download exceptin:------" + e.getMessage());
if(e.getMessage().indexOf("No such file")>-1) {
// 利用反射修改版本编号，从而可修改编码，解决中文文件名不能下载的问题
Class cl = ChannelSftp.class;
Field field = cl.getDeclaredField("server_version");
field.setAccessible(true);
field.set(sftp, 2);
sftp.setFilenameEncoding("GBK");
is = sftp.get(downloadFile);
}
}
byte[] fileData = IOUtils.toByteArray(is);
return fileData;
}
/**
* 删除文件
* @param directory 要删除文件所在目录
* @param deleteFile 要删除的文件
*/
public void delete(String directory, String deleteFile) throws SftpException{
sftp.cd(directory);
sftp.rm(deleteFile);
}
/**
* 列出目录下的文件
* @param directory 要列出的目录
*/
public Vector<?> listFiles(String directory) throws SftpException {
return sftp.ls(directory);
}
//上传文件测试
public static void main(String[] args) throws SftpException, IOException {
// SFTPUtil sftp = new SFTPUtil("用户名", "密码", "ip地址", 22);
SFTPUtil sftp = new SFTPUtil("kingfu", "123456", "localhost", 2022);
sftp.login();
byte[] bytes = sftp.download("/","abc.txt");
System.out.println(bytes.length);
sftp.logout();
}
}
------------------ 调用 ------------------
@RequestMapping("downloadSftp")
@ResponseBody
public void downloadSftp(HttpServletRequest request, HttpServletResponse response) throws Exception {
ServletOutputStream fos = null;
SFTPUtil sftp = null;
try {
String ftpUrl = PropertyUtil.getProperty("bossFtp.url");
String ftpPath = PropertyUtil.getProperty("bossFtp.path");
String ftpUsername = PropertyUtil.getProperty("bossFtp.username");
String ftpPassword = PropertyUtil.getProperty("bossFtp.password");
String ftpPort = PropertyUtil.getProperty("bossFtp.port");
String name = request.getParameter("name");
String fileName = request.getParameter("fileName");
String type = new MimetypesFileTypeMap().getContentType(fileName);
response.reset();
response.setContentType("application/x-download");
response.setCharacterEncoding("UTF-8");
response.setHeader("Access-Control-Allow-Origin", "*");
response.setContentType(type);
response.setHeader("Content-Disposition", "attachment;filename=\"" + URLEncoder.encode(name, "utf-8") + "\"");
logger.debug("path----:"+ftpUrl+","+ftpPath+":"+ftpPort+","+ftpUsername+","+ftpPassword
+",name:"+name+","+fileName+","+type);
sftp = new SFTPUtil(ftpUsername, ftpPassword, ftpUrl, ftpPort);
sftp.login();
logger.info("路径文件数量：{}", sftp.listFiles(ftpPath).size() );
byte[] buff = sftp.download(ftpPath, fileName);
fos = response.getOutputStream();
fos.write(buff);
} catch (Exception e) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
e.printStackTrace(new PrintStream(baos));
logger.error("downloadSftp exceptin:------" + baos.toString());
} finally {
fos.close();
bos.close();
sftp.logout();
}
}
------------------ 前端 ------------------
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