与Java的SSH连接

Question

如何使用Java连接到SSH服务器？我不需要/想要一个shell.我只想连接到SSH服务器并获取内容,比如说file.txt.我怎样才能做到这一点？

Answer 1

使用JSch

import com.jcraft.jsch.*;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Scanner;

/**
 * @author World
 */
public class SSHReadFile {

    public static void main(String args[]) {
        String user = "john";
        String password = "mypassword";
        String host = "192.168.100.23";
        int port = 22;
        String remoteFile = "/home/john/test.txt";

        try {
            JSch jsch = new JSch();
            Session session = jsch.getSession(user, host, port);
            session.setPassword(password);
            session.setConfig("StrictHostKeyChecking", "no");
            System.out.println("Establishing Connection...");
            session.connect();
            System.out.println("Connection established.");
            System.out.println("Crating SFTP Channel.");
            ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
            sftpChannel.connect();
            System.out.println("SFTP Channel created.");

            InputStream inputStream = sftpChannel.get(remoteFile);

            try (Scanner scanner = new Scanner(new InputStreamReader(inputStream))) {
                while (scanner.hasNextLine()) {
                    String line = scanner.nextLine();
                    System.out.println(line);
                }
            }
        } catch (JSchException | SftpException e) {
            e.printStackTrace();
        }
    }
}

输出:

Establishing Connection...
Connection established.
Crating SFTP Channel.
SFTP Channel created.
This is content from file /home/john/test.txt

Answer 2

Java不支持本机,但您可以使用像JSch这样的库来执行此操作