com.jcraft.jsch 实现SSH的BindAddress功能

今天使用jsch实现ssh功能遇到一个问题，请各位大神帮忙看看，先在这里谢过了。问题如下：
之前能通过命令sftp username@ip连接对端服务器，java代码为

 com.jcraft.jsch.Session session = null;
JSch jsch = new JSch();
session = jsch.getSession(userName, ip, Integer.parseInt(port));
session.setConfig("StrictHostKeyChecking", "no");
session.setPassword(password);
session.connect();
channel = session.openChannel("sftp");
channel.connect();

后面由于客户安全考虑使用了浮动ip,先前的命令无法连通，需用命令sftp -oBindAddress=ip_浮动 syncoss@ip。
发现使用session.setConfig("BindAddress", ip_浮动);//无效

继续查资料，试着使用代理

  ProxySOCKS4 proxysocket = new ProxySOCKS4(ip_浮动,22);
 session.setProxy(proxysocket);

依旧不行。。。。

求各位大神。指教

SocketFactoryIns socketFactory = new SocketFactoryIns();
socketFactory.setLocalAddressIp(bindAddress);
session.setSocketFactory(socketFactory);

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import com.jcraft.jsch.SocketFactory;
import com.ztesoft.zsmart.uip.base.util.LogBase;

public class SocketFactoryIns implements SocketFactory {
private LogBase iplog = LogBase.getLogger(SocketFactoryIns.class);
private InputStream in = null;
private OutputStream out = null;
private String localAddressIp = null;

@Override
public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
    // TODO Auto-generated method stub
    InetAddress remoteIp = InetAddress.getByName(host);
    InetAddress localIp = InetAddress.getByName(localAddressIp);

    iplog.info("remoteIp >>" + remoteIp.toString());
    iplog.info("localIp >>" + localIp.toString());
    Socket socket = new Socket(remoteIp, 22, localIp, 0);
    iplog.info("socket created >> " + socket.toString());
    return socket;

}



public String getLocalAddressIp() {
    return localAddressIp;
}



public void setLocalAddressIp(String localAddressIp) {
    this.localAddressIp = localAddressIp;
}



@Override
public InputStream getInputStream(Socket socket) throws IOException {
    // TODO Auto-generated method stub
     if (in == null)
            in = socket.getInputStream();
    return in;
}

@Override
public OutputStream getOutputStream(Socket socket) throws IOException {
    // TODO Auto-generated method stub
     if (out == null)
            out = socket.getOutputStream();
        return out;
}
public static void main(String[] args){
    SocketFactoryIns ins = new SocketFactoryIns();
    try {
        ins.createSocket("10.45.50.112", 22);
    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

}

使用方法ession.setSocketFactory(socketFactory)；
代码如下：

 SocketFactoryIns socketFactory = new SocketFactoryIns();
    socketFactory.setLocalAddressIp(bindAddress);
    session.setSocketFactory(socketFactory);

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import com.jcraft.jsch.SocketFactory;
import com.ztesoft.zsmart.uip.base.util.LogBase;

public class SocketFactoryIns implements SocketFactory {
    private LogBase iplog = LogBase.getLogger(SocketFactoryIns.class);
    private InputStream in = null;
    private OutputStream out = null;
    private String localAddressIp = null;

    @Override
    public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
        // TODO Auto-generated method stub
        InetAddress remoteIp = InetAddress.getByName(host);
        InetAddress localIp = InetAddress.getByName(localAddressIp);

        iplog.info("remoteIp >>" + remoteIp.toString());
        iplog.info("localIp >>" + localIp.toString());
        Socket socket = new Socket(remoteIp, 22, localIp, 0);
        iplog.info("socket created >> " + socket.toString());
        return socket;

    }



    public String getLocalAddressIp() {
        return localAddressIp;
    }



    public void setLocalAddressIp(String localAddressIp) {
        this.localAddressIp = localAddressIp;
    }



    @Override
    public InputStream getInputStream(Socket socket) throws IOException {
        // TODO Auto-generated method stub
         if (in == null)
                in = socket.getInputStream();
        return in;
    }

    @Override
    public OutputStream getOutputStream(Socket socket) throws IOException {
        // TODO Auto-generated method stub
         if (out == null)
                out = socket.getOutputStream();
            return out;
    }
    public static void main(String[] args){
        SocketFactoryIns ins = new SocketFactoryIns();
        try {
            ins.createSocket("10.45.50.112", 22);
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}