我正面临一个问题，即使用java将文件从linux服务器发送到windows服务器。我使用jsch库发送文件。当我从linux服务器在windows服务器的990端口上进行telnet时，一切正常。这就是它的样子：

我编写了以下代码来发送文件：

protected boolean sendFileToRemoteServer() {
    String fileName = redExpressConfigurationProperties.getUploadPath() + "test.txt";
    JSch jsch = new JSch();
    Session jschSession = null;
    boolean returnedValue = false;
    try {
        jschSession = getSessionOfRemoteServer(jsch);
        log.debug("Got Session!");
        ChannelSftp channelSftp = getSftpChannelFromSession(jschSession);

        channelSftp.put(fileName, redExpressConfigurationProperties.getRemoteServerFilePath());
        channelSftp.exit();
        log.debug("File sent!");
        returnedValue = true;
    } catch (JSchException | SftpException e) {
        log.error("Exception: ", e);
    } finally {
        if (jschSession != null) {
            jschSession.disconnect();
        }
    }
    return returnedValue;
}

protected Session getSessionOfRemoteServer(JSch jsch) throws JSchException {
    Properties properties = new Properties();
    properties.put("StrictHostKeyChecking", "no");
    Session session = jsch.getSession(redExpressConfigurationProperties.getRemoteServerUser(),
            redExpressConfigurationProperties.getRemoteServerAddress(),
            redExpressConfigurationProperties.getRemoteServerSshPort()); // port is 990
    session.setConfig(properties);
    session.setPassword(redExpressConfigurationProperties.getRemoteServerPassword());
    log.debug("password: {}", redExpressConfigurationProperties.getRemoteServerPassword());
    log.debug("server address: {}", redExpressConfigurationProperties.getRemoteServerAddress());
    return session;
}

protected ChannelSftp getSftpChannelFromSession(Session jschSession) throws JSchException {
    jschSession.connect(redExpressConfigurationProperties.getRemoteSessionTimeout()); // timeout is 10000 
    log.debug("Server Connected!");
    Channel channel = jschSession.openChannel("sftp");
    channel.connect(redExpressConfigurationProperties.getRemoteChannelTimeout());
    log.debug("Got sftp channel for session!");
    return (ChannelSftp) channel;
}

我的梯度依赖性是：

implementation 'com.jcraft:jsch:0.1.55'

这是my application.properties文件的一部分：

但是当我运行代码时，我在尝试连接windows服务器时遇到异常。这是日志：

2020-12-21 17:48:07:976 [main] ERROR c.e.d.DemoApplication:78 - Exception: 
com.jcraft.jsch.JSchException: Session.connect: java.net.SocketTimeoutException: Read timed out
    at com.jcraft.jsch.Session.connect(Session.java:565)
    at com.example.demo.DemoApplication.getSftpChannelFromSession(DemoApplication.java:55)
    at com.example.demo.DemoApplication.sendFileToRemoteServer(DemoApplication.java:71)
    at com.example.demo.DemoApplication.test(DemoApplication.java:31)
    at com.example.demo.DemoApplication$$EnhancerBySpringCGLIB$$a080bb04.CGLIB$test$3(<generated>)
    at com.example.demo.DemoApplication$$EnhancerBySpringCGLIB$$a080bb04$$FastClassBySpringCGLIB$$22565bf1.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331)
    at com.example.demo.DemoApplication$$EnhancerBySpringCGLIB$$a080bb04.test(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:486)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1179)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:571)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:923)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298)
    at com.example.demo.DemoApplication.main(DemoApplication.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:107)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)

这是我得到的例外：

jschSession.connect(redExpressConfigurationProperties.getRemoteSessionTimeout());

我做错了什么？我选错图书馆了吗？是否存在任何身份验证问题？或任何其他问题？
通过谷歌搜索，我没有找到那么多帮助。所以贴在这里。能得到帮助就太好了。提前谢谢。