我知道了。
__在while循环中， line 永远不会为 null 。
为何在调试中起作用仍是一个谜。
我正在发布 。我希望它对每个想做类似事情的人都有帮助。
package Utility;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
public class JavaTelnet {
public static void main(String[] arg) {
try {
System.out.println(telnetConnection(YOUR_COMMAND,YOUR_USER,YOUR_PASS,YOUR_HOST));
} catch (Exception e) {
e.printStackTrace();
}
}
public static String telnetConnection(String command, String user, String password, String host) throws JSchException, Exception {
JSch jsch=new JSch();
Session session=jsch.getSession(user, host, 22);
session.setPassword(password);
// It must not be recommended, but if you want to skip host-key check,
session.setConfig("StrictHostKeyChecking", "no");
session.connect(3000);
//session.connect(30000); // making a connection with timeout.
Channel channel=session.openChannel("shell");
channel.connect(3000);
DataInputStream dataIn = new DataInputStream(channel.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(dataIn));
DataOutputStream dataOut = new DataOutputStream(channel.getOutputStream());
System.out.println("Starting telnet connection...");
dataOut.writeBytes("telnet localhost 4242\r\n");
// dataOut.writeBytes("enable\r\n");
dataOut.writeBytes(command+"\r\n");
dataOut.writeBytes("exit\r\n"); //exit from telnet
dataOut.writeBytes("exit\r\n"); //exit from shell
dataOut.flush();
String line = reader.readLine();
String result = line +"\n";
while (!(line= reader.readLine()).equals("Connection closed by foreign host")){
result += line +"\n";
}
dataIn.close();
dataOut.close();
channel.disconnect();
session.disconnect();
return result;
}
}
注意，该外壳是Linux外壳。在Windows中，“退出”命令应该不同
602392714
清零编程群