java远程jsch，执行python程序不能实时获取输出

Question

使用jsch远程连接，执行cmd

public String execCmd(String command) throws Exception {
    initChannelExec();
    log.info("execCmd command - > {}", command);
    channel.setInputStream(System.in);
    channelExec.setCommand(command);
    channel.connect();
    StringBuilder sb = new StringBuilder(16);
    try (InputStream in = channel.getInputStream();
            InputStreamReader isr = new InputStreamReader(in, StandardCharsets.UTF_8);
            BufferedReader reader = new BufferedReader(isr)) {
        String buffer;
        while ((buffer = reader.readLine()) != null) {
            log.info(buffer);
            sb.append("\n").append(buffer);
        }
        log.info("execCmd result - > {}", sb);
        return sb.toString();
    }
}

执行远程python程序：hello_world.py

import time
print("hello world start")
time.sleep(10)
print("hello world end.")

输出不实时

log.info(buffer);这句打印hello world start 和hello world end是同时打印出来的，我想要先打印第一行，等10s再打印第二行，请问怎么实现

Answer 1