sftp文件上传下载方法

随着信息化、数字化的发展，企业对数据安全及应用安全意识普遍加强，在数据文件传输过程中，一般建议使用sftp协议进行文件传输，sftp文件操作脚本如下：

sftp操作主要有三种方式，分别是sftp客户端操作、sdk操作、操作系统命令操作，针对sdk方式。

一、sdk方式：

<!-- sftp集成jar -->
<dependency>
    <groupId>com.jcraft</groupId>
    <artifactId>jsch</artifactId>
    <version>0.1.55</version>
</dependency>

public class SftpUtils {

    private static final Logger logger = LoggerFactory.getLogger(SftpUtils.class);
    private static final String SESSION_CONFIG_STRICT_HOST_KEY_CHECKING = "StrictHostKeyChecking";


    /**
     * 创建SFTP连接
     * @return
     * @throws Exception
     */
    public static ChannelSftp createSftp(String username,String password,String host,int port) throws Exception {
        JSch jsch = new JSch();
        logger.info(("Try to connect sftp" + username + "@" + host + "], use password[" + password));

        Session session = createSession(jsch,host, username, port);
        session.setPassword(password);
        session.connect(15000);

        logger.info("Session connected to {"+  host);

        Channel channel = session.openChannel("sftp");
        channel.connect();

        logger.info("Channel created to"+  host);

        return (ChannelSftp) channel;
    }
    /**
     * 创建session
     * @param jsch
     * @param host
     * @param username
     * @param port
     * @return
     * @throws Exception
     */
    private static Session createSession(JSch jsch, String host, String username, Integer port) throws Exception {
        Session session = null;

        if (port <= 0) {
            session = jsch.getSession(username, host);
        } else {
            session = jsch.getSession(username, host, port);
        }

        if (session == null) {
            throw new Exception(host + " session is null");
        }
        session.setConfig(SESSION_CONFIG_STRICT_HOST_KEY_CHECKING, "no");
        return session;
    }

    /**
     * 关闭连接
     * @param sftp
     */
    public static void disconnect(ChannelSftp sftp) {
        try {
            if (sftp != null) {
                if (sftp.isConnected()) {
                    sftp.disconnect();
                } else if (sftp.isClosed()) {
                    //log.info("sftp is closed already");
                    System.out.println("sftp is closed already");
                }
                if (null != sftp.getSession()) {
                    sftp.getSession().disconnect();
                }
            }
        } catch (JSchException e) {
            e.printStackTrace();
        }
    }

    public static void download(String sftpUrl, String localFilePath, String sftpUsername, String sftpPassword, String sftpControlEncoding,String host,String port,String fileName) throws Exception {
        String username = StringUtils.isEmpty(sftpUsername) ? ConfigConstants.getSftpUsername() : sftpUsername;
        String password = StringUtils.isEmpty(sftpPassword) ? ConfigConstants.getSftpPassword() : sftpPassword;
        String controlEncoding = StringUtils.isEmpty(sftpControlEncoding) ? ConfigConstants.getSftpControlEncoding() : sftpControlEncoding;

        logger.debug("SFTP connection url:{}, username:{}, password:{}, controlEncoding:{}, localFilePath:{}", sftpUrl, username, password, controlEncoding, localFilePath);
        String remoteFilePath = sftpUrl.split(host + "/")[1].split("\\?")[0];
        String encodefileName = remoteFilePath.substring(remoteFilePath.lastIndexOf("/")+1);
        String dir = remoteFilePath.replace("/" + encodefileName,"");

        ChannelSftp channelSftp = createSftp(username,password,host,Integer.parseInt(port));
        OutputStream outputStream = Files.newOutputStream(Paths.get(localFilePath));
        channelSftp.cd(dir);
        channelSftp.get(fileName,outputStream);
        logger.debug("SFTP download success");
        outputStream.flush();
        outputStream.close();
        disconnect(channelSftp);
    }

    public static void main(String[] args) throws GalimatiasParseException {
        String url = ("sftp://192.168.1.1/upload/test/demo/file.zip?sftp.username=sftpadmin&sftp.password=sftp&sftp.control.encoding=UTF-8");
        String[] arrsy = url.split("192.168.1.1/");
        System.out.println(url.split("192.168.1.1/"));
        System.out.println(arrsy[1].split("\\?")[0]);

        String remoteFilePath = url.split("192.168.1.1" + "/")[1].split("\\?")[0];
    }
}

二、客户端方式：

 1 #!/bin/bash
 2 
 3 SFTP_HOST_IP=192.168.1.1
 4 SFTP_HOST_PORT=22
 5 SFTP_HOST_USER=sftpadmin
 6 SFTP_HOST_PASSWD=sftp
 7 SFTP_BASE_DIR=upload
 8 SYSTEM_CODE=$1
 9 UPLOAD_FILE=$2
10 
11 UPLOAD_DIR=${SFTP_BASE_DIR}/${SYSTEM_CODE}
12 sftpPutFiles(){
13   ftpUser=$1
14   ftpPwd=$2
15   host=$3
16   port=$4
17   remoteDir=$5
18   uploadFile=$6
19   lftp -u ${ftpUser},${ftpPwd} sftp://${host}:${port} <<EOF
20   cd ${remoteDir}
21   mput ${uploadFile}
22   bye
23 EOF
24 }
25 echo "上传文件开始：" +`date`
26 sftpPutFiles $SFTP_HOST_USER $SFTP_HOST_PASSWD $SFTP_HOST_IP $SFTP_HOST_PORT $UPLOAD_DIR $UPLOAD_FILE
27 echo "上传文件结束：" +`date`
28 
29 sftpGetFiles(){
30   ftpUser=$1
31   ftpPwd=$2
32   host=$3
33   port=$4
34   remoteDir=$5
35   downFile=$6
36   lftp -u ${ftpUser},${ftpPwd} sftp://${host}:${port} <<EOF
37   cd ${remoteDir}
38   set xfer:clobber on
39   mget ${downFile}
40   bye
41 EOF
42 }
43 echo "下载文件开始：" +`date`
44 sftpGetFiles $SFTP_HOST_USER $SFTP_HOST_PASSWD $SFTP_HOST_IP $SFTP_HOST_PORT $UPLOAD_DIR
45 echo "下载文件结束：" +`date`

三、操作系统命令方式：

1 上传sftp：
2     curl -T app.zip sftp://sftpuser:sftppasswd@127.0.0.1:12024/data/sftp_data/
3 下载sftp：
4     curl sftp://sftpuser:sftppasswd@127.0.0.1:12024/data/sftp_data/file.txt -o file.txt