jsch java ssh客户端在命令执行后不会断开连接

Question

我使用java ssh客户端（http://www.jcraft.com/jsch/）连接到远程机器并执行命令。代码工作正常，直到我连接到远程机器并执行命令。然而，问题是，即使命令执行成功，通道和会话也不会断开。

我也打电话给session.disconnect和channel.disconnect，但仍然是问题所在。

这是我的代码：

    JSch jsch = new JSch();
    String host = null;
    host = "192.168.102.211";
    String privateKey = "C:\\test\\key";
    String cmd = "a";
    String command = "b";

    jsch.addIdentity(privateKey);
    Session session = jsch.getSession("user1", host, 22);
    Channel channel = session.openChannel("shell");

    UserInfo ui = new MyUserInfo() {
        public boolean promptYesNo(String message) {
            return true;
        }
    };
    session.setUserInfo(ui);
    session.connect(30000);

    OutputStream ops = channel.getOutputStream();
    PrintStream ps = new PrintStream(ops, true);

    channel.connect();
    ps.println(cmd);
    ps.println(command);
    ps.close();

    InputStream in = channel.getInputStream();
    byte[] bt = new byte[1024];
        while (in.available() > 0) {
        //  int i = in.read(bt, 0, 1024);
            for (int i = in.read(); i >=0; i--)
                    {
            String str = new String(bt, 0, i);
            System.out.print(str);
                    }
            break;

    }

 if (channel != null) {
        channel.disconnect();
        session.disconnect();
        System.out.println(channel.isConnected());
    }
}

请建议

Answer 1

我有类似的错误，我将代码更改为
首先声明会话和通道

static Session session = null;
static Channel channel = null;

这是连接码

public static OutputStream puttyConnection(String user, String hostName, String password)
        throws JSchException, IOException {
    session = new JSch().getSession(user, hostName, 22);
    session.setPassword(password);
    java.util.Properties config = new java.util.Properties();
    config.put("StrictHostKeyChecking", "no");
    session.setConfig(config);
    session.connect();
    channel = session.openChannel("shell");
    OutputStream ops = channel.getOutputStream();
    channel.connect();
    return ops;
}

在我运行的代码结束时，我经常这样断开连接

  if (channel != null) {
                channel.disconnect();
                session.disconnect();
                System.out.println(channel.isConnected());
        }

Answer 2

用相关代码更新您的问题。只是一个提示，你应该这样做。

} finally {
    if (channel != null) {
        Session session = channel.getSession();
        channel.disconnect();
        session.disconnect();
        System.out.println(channel.isConnected());
    }
}