Java与阿里云云服务器：如何实现安全访问和数据传输？

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;

public class SSHExample {
    public static void main(String[] args) {
        String host = "your-hostname";
        int port = 22;
        String username = "your-username";
        String password = "your-password";
        
        try {
            JSch jSch = new JSch();
            Session session = jSch.getSession(username, host, port);
            session.setPassword(password);
            session.setConfig("StrictHostKeyChecking", "no");
            session.connect();
            
            Channel channel = session.openChannel("exec");
            ((ChannelExec) channel).setCommand("ls /");
            channel.setInputStream(null);
            ((ChannelExec) channel).setErrStream(System.err);
            
            InputStream in = channel.getInputStream();
            channel.connect();
            
            byte[] buffer = new byte[1024];
            while (in.read(buffer) != -1) {
                System.out.println(new String(buffer));
            }
            
            channel.disconnect();
            session.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.model.PutObjectRequest;

import java.io.File;

public class OSSExample {
    public static void main(String[] args) {
        String endpoint = "your-endpoint";
        String accessKeyId = "your-access-key-id";
        String accessKeySecret = "your-access-key-secret";
        String bucketName = "your-bucket-name";
        
        String objectName = "example.txt";
        String localFilePath = "example.txt";
        
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        
        PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, new File(localFilePath));
        ossClient.putObject(putObjectRequest);
        
        ossClient.shutdown();
    }
}