Ganymed-ssh2实现scp上传和下载文件，以及执行shell命令

使用Ganymed-ssh2执行远程机器上的Shell脚本，还可以使用SCP来上传和下载文件

严禁转载！！！

        
            com.airlenet.yang
            ganymed-ssh2
            1.2.0
        

scp:
  ip: 192.168.1.22
  port: 22
  userName: root
  password: 123456

import ch.ethz.ssh2.ChannelCondition;
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.SCPClient;
import ch.ethz.ssh2.Session;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Nonnull;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Objects;


@Slf4j
@Component
public class ScpHelper {

    @Value("${scp.ip}")
    private String scpIp;

    @Value("${scp.port:22}")
    private Integer scpPort;

    @Value("${scp.userName:root}")
    private String userName;

    @Value("${scp.password}")
    private String password;
    
    private Connection connection;

    
    public synchronized void initConnection(){
        if (Objects.isNull(connection)){
            try {
                connection = new Connection(scpIp, scpPort);
                connection.connect();
            } catch (Exception e) {
                log.error("SCP-初始化SCP连接失败，请配置后再使用该工具！");
                throw new RuntimeException("SCP-初始化SCP连接失败，请配置后再使用该工具！",e);
            }
            boolean b = authenticate(userName, password);
            if (!b){
                try {
                    throw new RuntimeException("SCP-认证失败，无法执行相关命令！");
                } finally {
                    connection.close();
                }
            }
        }
    }

    
    public boolean authenticate(String userName, String password) {
        try {
            return connection.authenticateWithPassword(userName, password);
        } catch (IOException e) {
            log.error("SCP-认证异常",e);
        }
        return false;
    }


    private void before(){
        initConnection();
    }

    
    public void execSimpleCmd(String cmd) {
        before();
        Session session = null;
        try {
            session = connection.openSession();
            session.execCommand(cmd);
        } catch (Exception e) {
            log.error("SCP-执行shell命令失败",e);
        } finally {
            if (Objects.nonNull(session)){
                session.close();
            }

        }
    }

    
    public void execCmd(String cmd){
        before();
        Session session = null;
        try {
            session = connection.openSession();
            // 建立虚拟终端
            session.requestPTY("bash");
            // 打开一个Shell
            session.startShell();
            // 准备输入命令
            PrintWriter out = new PrintWriter(session.getStdin());
            // 输入待执行命令
            out.println(cmd);
            out.println("exit");
            // 关闭输入流
            out.close();
            // 等待，除非1.连接关闭；2.输出数据传送完毕；3.进程状态为退出；4.超时
            session.waitForCondition(ChannelCondition.CLOSED | ChannelCondition.EOF | ChannelCondition.EXIT_STATUS , 30000);
        } catch (Exception e) {
            log.error("SCP-执行shell命令失败",e);
        } finally {
            if (Objects.nonNull(session)){
                session.close();
            }
        }
    }

    
    public void getFile(String remoteFile, String localPath) {
        try {
            before();
            SCPClient scpClient = connection.createSCPClient();
            scpClient.get(remoteFile, localPath);
        } catch (Exception e) {
            log.error("SCP-下载到本地文件失败",e);
        } finally {
            connection.close();
        }
    }

    
    public ByteArrayOutputStream getFile(String remoteFile) {
        try {
            before();
            SCPClient scpClient = connection.createSCPClient();
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            scpClient.get(remoteFile, outputStream);
            return outputStream;
        } catch (Exception e) {
            log.error("SCP-下载到字节流失败",e);
        } finally {
            connection.close();
        }
        return null;
    }

    
    public void putFile(String localFile,
                        String remoteTargetDirectory) {
        try {
            before();
            execCmd("mkdir -p " + remoteTargetDirectory);
            SCPClient scpClient = connection.createSCPClient();
            scpClient.put(localFile, remoteTargetDirectory);
        } catch (Exception e){
            log.error("SCP-上传本地文件失败",e);
        } finally {
            connection.close();
        }
    }

    
    public void putFile(@Nonnull MultipartFile multipartFile,
                        String newFileName ,
                        @Nonnull String remoteTargetDirectory) {
        try {
            before();
            execCmd("mkdir -p " + remoteTargetDirectory);
            SCPClient scpClient = connection.createSCPClient();
            InputStream inputStream = multipartFile.getInputStream();
            newFileName = StringUtils.isBlank(newFileName) ? multipartFile.getOriginalFilename() : newFileName;
            scpClient.put(IOUtils.toByteArray(inputStream), newFileName, remoteTargetDirectory);
        } catch (Exception e){
            log.error("SCP-上传本地文件失败",e);
        } finally {
            connection.close();
        }
    }


    
    public void putFile(@Nonnull InputStream inputStream,
                        @Nonnull String remoteFileName,
                        @Nonnull String remoteTargetDirectory) {
        try {
            before();
            execCmd("mkdir -p " + remoteTargetDirectory);
            SCPClient scpClient = connection.createSCPClient();
            scpClient.put(IOUtils.toByteArray(inputStream), remoteFileName, remoteTargetDirectory);
        } catch (Exception e){
            log.error("SCP-上传本地文件失败",e);
        } finally {
            connection.close();
        }
    }
}

@Slf4j
@SpringBootTest
public class ScpTests {

    @Autowired
    private ScpHelper scpHelper;

    @Test
    public void testUpload() throws IOException {
        ByteArrayInputStream bais = getTextBAIS("你好，scp!6666");
        scpHelper.putFile(bais,"266.txt","/opt/test/2021/");
    }

    public static ByteArrayInputStream getTextBAIS(String txtStr){
        try {
            byte[] bytes = txtStr.getBytes("UTF-8");
            ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
            return inputStream;
        } catch (UnsupportedEncodingException e) {
            return null;
        }
    }
}

效果：

文件打开显示：

你好，scp!6666

java 远程执行Shell命令-通过ganymed-ssh2连接
通过java程序实现scp上传和下载文件