如何使用 Java 在远程系统上运行 SSH 命令？
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How do I run SSH commands on remote system using Java?
提问by sweety
I am new to this kind of Java application and looking for some sample code on how to connect to a remote server using SSH , execute commands, and get output back using Java as programming language.
我是这种 Java 应用程序的新手，正在寻找一些关于如何使用 SSH 连接到远程服务器、执行命令以及使用 Java 作为编程语言获取输出的示例代码。
回答by bobah
Have a look at Runtime.exec() Javadoc
看看 Runtime.exec() Javadoc
Process p = Runtime.getRuntime().exec("ssh myhost");
PrintStream out = new PrintStream(p.getOutputStream());
BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
out.println("ls -l /home/me");
while (in.ready()) {
String s = in.readLine();
System.out.println(s);
}
out.println("exit");
p.waitFor();
回答by KarlP
I used ganymede for this a few yeas ago... http://www.cleondris.ch/opensource/ssh2/
几年前我为此使用过木卫二... http://www.cleondris.ch/opensource/ssh2/
回答by mehdi ali soltani
回答by neyc
You may take a look at this Java based framework for remote command execution, incl. via SSH: https://github.com/jkovacic/remote-execIt relies on two opensource SSH libraries, either JSch (for this implementation even an ECDSA authentication is supported) or Ganymed (one of these two libraries will be enough). At the first glance it might look a bit complex, you'll have to prepare plenty of SSH related classes (providing server and your user details, specifying encryption details, provide OpenSSH compatible private keys, etc., but the SSH itself is quite complex too). On the other hand, the modular design allows for simple inclusion of more SSH libraries, easy implementation of other command's output processing or even interactive classes etc.
您可以查看这个基于 Java 的远程命令执行框架，包括。通过 SSH：https: //github.com/jkovacic/remote-exec它依赖于两个开源 SSH 库，要么是 JSch（对于此实现，甚至支持 ECDSA 身份验证）或 Ganymed（这两个库中的一个就足够了）。乍一看它可能看起来有点复杂，您必须准备大量与 SSH 相关的类（提供服务器和您的用户详细信息、指定加密详细信息、提供与 OpenSSH 兼容的私钥等，但 SSH 本身非常复杂也）。另一方面，模块化设计允许简单地包含更多 SSH 库，轻松实现其他命令的输出处理甚至交互式类等。
回答by Pavan Kumar
Below is the easiest way to SSh in java. Download any of the file in the below link and extract, then add the jar file from the extracted file and add to your build path of the project http://www.ganymed.ethz.ch/ssh2/and use the below method
下面是在 Java 中使用 SSH 的最简单方法。下载以下链接中的任何文件并解压，然后从解压文件中添加 jar 文件并添加到项目的构建路径 http://www.ganymed.ethz.ch/ssh2/并使用以下方法
public void SSHClient(String serverIp,String command, String usernameString,String password) throws IOException{
System.out.println("inside the ssh function");
try
{
Connection conn = new Connection(serverIp);
conn.connect();
boolean isAuthenticated = conn.authenticateWithPassword(usernameString, password);
if (isAuthenticated == false)
throw new IOException("Authentication failed.");
ch.ethz.ssh2.Session sess = conn.openSession();
sess.execCommand(command);
InputStream stdout = new StreamGobbler(sess.getStdout());
BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
System.out.println("the output of the command is");
while (true)
{
String line = br.readLine();
if (line == null)
break;
System.out.println(line);
}
System.out.println("ExitCode: " + sess.getExitStatus());
sess.close();
conn.close();
}
catch (IOException e)
{
e.printStackTrace(System.err);
}
}
回答by Leonid Dashko
I created solution based on JSchlibrary:
我创建了基于JSch库的解决方案：
import com.google.common.io.CharStreams
import com.jcraft.jsch.ChannelExec
import com.jcraft.jsch.JSch
import com.jcraft.jsch.JSchException
import com.jcraft.jsch.Session
import static java.util.Arrays.asList
class RunCommandViaSsh {
private static final String SSH_HOST = "test.domain.com"
private static final String SSH_LOGIN = "username"
private static final String SSH_PASSWORD = "password"
public static void main() {
System.out.println(runCommand("pwd"))
System.out.println(runCommand("ls -la"));
}
private static List<String> runCommand(String command) {
Session session = setupSshSession();
session.connect();
ChannelExec channel = (ChannelExec) session.openChannel("exec");
try {
channel.setCommand("command");
channel.setInputStream(null);
InputStream output = channel.getInputStream();
channel.connect();
String result = CharStreams.toString(new InputStreamReader(output));
return asList(result.split("\n"));
} catch (JSchException | IOException e) {
closeConnection(channel, session)
throw new RuntimeException(e)
} finally {
closeConnection(channel, session)
}
}
private static Session setupSshSession() {
Session session = new JSch().getSession(SSH_LOGIN, SSH_HOST, 22);
session.setPassword(SSH_PASSWORD);
session.setConfig("PreferredAuthentications", "publickey,keyboard-interactive,password");
session.setConfig("StrictHostKeyChecking", "no"); // disable check for RSA key
return session;
}
private static void closeConnection(ChannelExec channel, Session session) {
try {
channel.disconnect()
} catch (Exception ignored) {
}
session.disconnect()
}
}
