小编典典

OP可能不再需要我的解决方案，但是正在寻找能够同时满足这两个条件的解决方案的其他任何人：1)等待命令在远程计算机上完成；2)将输出捕获为字符串；您可以尝试以下方法：

public class SshConnectionManager {

private static Session session;

private static ChannelShell channel;

private static String username = "";

private static String password = "";

private static String hostname = "";

private static Session getSession(){

if(session == null || !session.isConnected()){

session = connect(hostname,username,password);

}

return session;

}

private static Channel getChannel(){

if(channel == null || !channel.isConnected()){

try{

channel = (ChannelShell)getSession().openChannel("shell");

channel.connect();

}catch(Exception e){

System.out.println("Error while opening channel: "+ e);

}

}

return channel;

}

private static Session connect(String hostname, String username, String password){

JSch jSch = new JSch();

try {

session = jSch.getSession(username, hostname, 22);

Properties config = new Properties();

config.put("StrictHostKeyChecking", "no");

session.setConfig(config);

session.setPassword(password);

System.out.println("Connecting SSH to " + hostname + " - Please wait for few seconds... ");

session.connect();

System.out.println("Connected!");

}catch(Exception e){

System.out.println("An error occurred while connecting to "+hostname+": "+e);

}

return session;

}

private static void executeCommands(List commands){

try{

Channel channel=getChannel();

System.out.println("Sending commands...");

sendCommands(channel, commands);

readChannelOutput(channel);

System.out.println("Finished sending commands!");

}catch(Exception e){

System.out.println("An error ocurred during executeCommands: "+e);

}

}

private static void sendCommands(Channel channel, List commands){

try{

PrintStream out = new PrintStream(channel.getOutputStream());

out.println("#!/bin/bash");

for(String command : commands){

out.println(command);

}

out.println("exit");

out.flush();

}catch(Exception e){

System.out.println("Error while sending commands: "+ e);

}

}

private static void readChannelOutput(Channel channel){

byte[] buffer = new byte[1024];

try{

InputStream in = channel.getInputStream();

String line = "";

while (true){

while (in.available() > 0) {

int i = in.read(buffer, 0, 1024);

if (i < 0) {

break;

}

line = new String(buffer, 0, i);

System.out.println(line);

}

if(line.contains("logout")){

break;

}

if (channel.isClosed()){

break;

}

try {

Thread.sleep(1000);

} catch (Exception ee){}

}

}catch(Exception e){

System.out.println("Error while reading channel output: "+ e);

}

}

public static void close(){

channel.disconnect();

session.disconnect();

System.out.println("Disconnected channel and session");

}

public static void main(String[] args){

List commands = new ArrayList();

commands.add("ls -l");

executeCommands(commands);

close();

}

}

如果您需要一次发送多个命令并保持通道打开以供以后使用，则此解决方案也很有用。

2020-11-19