Introduction to the method of using Java code to operate Linux under Windows system

This article brings you an introduction to how to use Java code to operate Linux under Windows systems. It has certain reference value. Friends in need can refer to it. I hope it will be useful to you. helped.

1. Scenario description:

The main project (Web) is deployed under Windows, and the algorithm project (TensorFlow) is deployed under Linux environment.

2. Dependency environment (Jar)

        <!--Java SSH插件-->
        <dependency>
            <groupId>ch.ethz.ganymed</groupId>
            <artifactId>ganymed-ssh2</artifactId>
            <version>build210</version>
        </dependency>
        <dependency>
            <groupId>sshtools</groupId>
            <artifactId>j2ssh-core</artifactId>
            <version>0.2.9</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>

3. Back-end code

package cn.virgo.audio.utils;


import ch.ethz.ssh2.ChannelCondition;
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
import com.sshtools.j2ssh.SshClient;
import com.sshtools.j2ssh.authentication.AuthenticationProtocolState;
import com.sshtools.j2ssh.authentication.PasswordAuthenticationClient;
import com.sshtools.j2ssh.sftp.SftpFile;
import org.apache.commons.io.IOUtils;

import java.io.*;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

public class RemoteShellExecutor {

    private Connection conn;

    private String ip;

    private String userName;

    private String password;

    private String charset = Charset.defaultCharset().toString();

    private static final int TIME_OUT = 1000 * 5 * 60;

    /**
     * 构造函数
     *
     * @param ip
     * @param userName
     * @param password
     */
    public RemoteShellExecutor(String ip, String userName, String password) {
        this.ip = ip;
        this.userName = userName;
        this.password = password;
    }

    /**
     * 链接远程桌面
     *
     * @return
     * @throws IOException
     */
    private boolean login() throws IOException {
        conn = new ch.ethz.ssh2.Connection(ip);
        conn.connect();
        return conn.authenticateWithPassword(userName, password);
    }

    /**
     * 执行shell
     *
     * @param cmds
     * @return
     * @throws Exception
     */
    public int exec(String cmds) throws Exception {
        InputStream stdOut = null;
        InputStream stdErr = null;
        int ret = -1;
        try {
            if (login()) {
                Session session = conn.openSession();
                session.execCommand(cmds);
                stdOut = new StreamGobbler(session.getStdout());
                processStream(stdOut, charset);
                stdErr = new StreamGobbler(session.getStderr());
                processStream(stdErr, charset);
                session.waitForCondition(ChannelCondition.EXIT_STATUS, TIME_OUT);
                ret = session.getExitStatus();
            } else {
                throw new Exception("远程链接失败:" + ip);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                conn.close();
            }
            IOUtils.closeQuietly(stdOut);
            IOUtils.closeQuietly(stdErr);
        }
        return ret;
    }

    /**
     * 获取执行过程输出
     *
     * @param in
     * @param charset
     * @return
     * @throws IOException
     */
    private void processStream(InputStream in, String charset) throws IOException {
        byte[] buf = new byte[1024];
        while (in.read(buf) != -1) {
            System.out.println(new String(buf, charset));
        }
    }

    /**
     *  获取Linux下某个文件数据，将其拷贝到本地tmpPath下
     */
    public List<String> getCaleResByFileFromSSH(String filePath, String filename, String tmpPath) {
        List<String> resList = new ArrayList<>();
        SshClient client = new SshClient();
        try {
            client.connect(this.ip);
            //设置用户名和密码
            PasswordAuthenticationClient pwd = new PasswordAuthenticationClient();
            pwd.setUsername(this.userName);
            pwd.setPassword(this.password);
            int result = client.authenticate(pwd);
            if (result == AuthenticationProtocolState.COMPLETE) {//如果连接完成
                List<SftpFile> list = client.openSftpClient().ls(filePath);
                for (SftpFile f : list) {
                    if (f.getFilename().equals(filename)) {
                        OutputStream os = new FileOutputStream(tmpPath + f.getFilename());
                        client.openSftpClient().get(f.getAbsolutePath(), os);
                        //以行为单位读取文件start
                        File file = new File(tmpPath + f.getFilename());
                        BufferedReader reader = null;
                        try {
                            reader = new BufferedReader(new FileReader(file));
                            String tempString = null;
                            int line = 1;//行号
                            //一次读入一行，直到读入null为文件结束
                            while ((tempString = reader.readLine()) != null) {
                                //显示行号
                                System.out.println("line " + line + ": " + tempString);
                                resList.add(tempString);
                                line++;
                            }
                            reader.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        } finally {
                            if (reader != null) {
                                try {
                                    reader.close();
                                } catch (IOException e1) {
                                }
                            }
                        }
                        //以行为单位读取文件end
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return resList;
    }
}

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