多线程 上传一个文件到sftp Java实现

可以使用JSch库来实现在Java中上传文件到SFTP服务器的功能，以下是一个简单的示例代码：

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

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

public class SftpUploader {
    private String host;
    private int port;
    private String username;
    private String password;
    private String remoteDirectory;

    public SftpUploader(String host, int port, String username, String password, String remoteDirectory) {
        this.host = host;
        this.port = port;
        this.username = username;
        this.password = password;
        this.remoteDirectory = remoteDirectory;
    }

    public void uploadFile(String localFilePath, String remoteFilename) throws Exception {
        JSch jsch = new JSch();
        Session session = jsch.getSession(username, host, port);
        session.setPassword(password);
        session.setConfig("StrictHostKeyChecking", "no");
        session.connect();

        Channel channel = session.openChannel("sftp");
        channel.connect();

        ChannelSftp sftpChannel = (ChannelSftp) channel;
        sftpChannel.cd(remoteDirectory);

        File localFile = new File(localFilePath);
        InputStream inputStream = new FileInputStream(localFile);
        sftpChannel.put(inputStream, remoteFilename);
        inputStream.close();

        sftpChannel.exit();
        session.disconnect();
    }
}

在上面的代码中，`SftpUploader`类的构造函数接收SFTP服务器的主机名、端口号、用户名、密码和远程目录路径。`uploadFile`方法接收本地文件路径和远程文件名，然后将文件上传到远程SFTP服务器。可以在多个线程中创建`SftpUploader`实例并调用`uploadFile`方法来同时上传多个文件。