rdf-file：SFTP工具

一：pom.xml

<dependency>
	<groupId>com.jcraft</groupId>
	<artifactId>jsch</artifactId>
	<version>0.1.55</version>
</dependency>

二：工具方法

@Slf4j
@Component("prototype")
public class SftpService {

    private ChannelSftp sftp;
    private Session session;


    public void upload(String host, int port, String username, String password, String privateKey, String dir, String fileName) {
        try {
            login(host, port, username, password, privateKey);
            upload(dir, fileName);
            logout();
        } catch (Exception e) {
            log.error("upload error", e);
        }
    }
    
    public void upload(String dir, String fileName) throws SftpException {
        try {
            sftp.cd(dir);
        } catch (SftpException e) {
            sftp.mkdir(dir);
            sftp.cd(dir);
        }

        sftp.put(fileName, dir);
        log.info("sftp upload success dir={}, fileName={}", dir, fileName);
    }

    public void download(String host, int port, String username, String password, String privateKey,
                         String remotePath, String remoteFileName, String localPath, String localFileName) {
        boolean success = false;
        try {
            login(host, port, username, password, privateKey);

            sftp.get(remotePath + remoteFileName, localPath + localFileName);
            logout();
            success = true;
        } catch (Exception e) {
            log.error("download error", e);
        }
    }

    private void login(String host, int port, String username, String password, String privateKey) throws JSchException {
        JSch jSch = new JSch();
        if (privateKey != null) {
            jSch.addIdentity(privateKey);
        }

        Properties config = new Properties();
        config.put("StrictHostKeyChecking", "no");
        session = jSch.getSession(username, host, port);
        session.setConfig(config);
        if (password != null) {
            session.setPassword(password);
        }
        session.connect();
        log.info("session connected: host={}, port={}, username={}", host, port, username);

        sftp = (ChannelSftp)session.openChannel("sftp");
        sftp.connect();
        log.info("sftp channel connected: host={}, port={}, username={}", host, port, username);
    }


    private void logout() {
        if (sftp != null && sftp.isConnected()) {
            sftp.disconnect();
            log.info("channelSftp disconnect", sftp);
        }

        if (session != null && session.isConnected()) {
            session.disconnect();
            log.info("session disconnect", session);
        }
    }
}