ssh协议的java实现有哪些

Java在SSH协议中实现了什么？

SSH（Secure Shell）它是一种安全远程登录和数据传输的网络协议。在Java中，我们可以使用多种方法来实现SSH协议的功能。本文将介绍几种常用的Java实现方法，并提供相应的代码示例。

[JSch](

import com.jcraft.jsch.*;public class SSHExample {    public static void main(String[] args) {        String host = "example.com";        String user = "username";        String password = "password";        try {            JSch jsch = new JSch();            Session session = jsch.getSession(user, host, 22);            session.setPassword(password);            session.setConfig("StrictHostKeyChecking", "no");            session.connect();            Channel channel = session.openChannel("shell");            channel.connect();            // 发送命令            ((ChannelShell)channel).setPty(true);            ((ChannelShell)channel).setCommand("ls -l");            // 获取输出            InputStream in = channel.getInputStream();            byte[] buffer = new byte[1024];            while (in.read(buffer) != -1) {                System.out.println(new String(buffer));            }            channel.disconnect();            session.disconnect();        } catch (JSchException | IOException e) {            e.printStackTrace();        }    }}

使用JSch库实现SSH连接，并发送上述代码ls -l命令，并输出执行结果。

[Apache MINA SSHD]( 实现MINASSH服务器和客户端。以下是使用Apache MINA SSHDSSH连接的示例代码：

import org.apache.sshd.client.SshClient;import org.apache.sshd.client.channel.ClientChannel;import org.apache.sshd.client.channel.ClientChannelEvent;import org.apache.sshd.client.channel.ClientChannelEventListenerAdapter;import org.apache.sshd.client.keyverifier.AcceptAllServerKeyVerifier;import org.apache.sshd.client.session.ClientSession;import org.apache.sshd.common.channel.PtyMode;import org.apache.sshd.common.util.io.NoCloseInputStream;import org.apache.sshd.common.util.io.NoCloseOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;public class SSHExample {    public static void main(String[] args) {        String host = "example.com";        String user = "username";        String password = "password";        try {            SshClient client = SshClient.setUpDefaultClient();            client.setServerKeyVerifier(AcceptAllServerKeyVerifier.INSTANCE);            client.start();            ClientSession session = client.connect(user, host, 22).verify().getSession();            session.addPasswordIdentity(password);            session.auth().verify();            ClientChannel channel = session.createShellChannel();            channel.setPtyModes(PtyMode.ECHO, PtyMode.ICRNL);            channel.setIn(new NoCloseInputStream(System.in));            channel.setOut(new NoCloseOutputStream(System.out));            channel.setErr(new NoCloseOutputStream(System.err));            channel.addChannelEventListener(new ClientChannelEventListenerAdapter() {                @Override                public void channelClosed(ClientChannel channel, Throwable reason) {                    client.stop();                }            });            channel.open().verify();            channel.waitFor(EnumSet.of(ClientChannelEvent.CLOSED), 0);        } catch (IOException e) {            e.printStackTrace();        }    }}

使用Apachee上述代码使用上述代码 MINA SSHD库实现SSH连接，将输入输出重定向标准输入输出流。

[Ganymed SSH-2]( SSH-SSH连接的示例代码：

import ch.ethz.ssh2.Connection;import ch.ethz.ssh2.Session;import ch.ethz.ssh2.StreamGobbler;import java.io.IOException;import java.io.InputStream;import java.nio.charset.StandardCharsets;public class SSHExample {    public static void main(String[] args) {        String host = "example.com";        String user = "username";        String password = "password";        try {            Connection conn = new Connection(host);            conn.connect();            boolean isAuthenticated = conn.authenticateWithPassword(user, password);            if (isAuthenticated) {                Session session = conn.openSession();                session.execCommand("ls -l");                InputStream stdout = new StreamGobbler(session.getStdout());                byte[] buffer =