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Java 实现 SCP 携带密码拷贝文件

news 2025/7/19 19:48:04

背景说明

涉及通过程序进行机器间的文件Copy的场景，我们一般会使用ssh连接机器，通过scp命令进行文件copy。

此种方案的前提是：机器间事先要配置免密码互通。

但是，如果客户现场机器数量过多，配置免密操作比较麻烦；或者处于安全考虑，客户不允许机器之间免密访问。

此时，需要另辟蹊径，找其他方案实现。

需求场景：提供机器的IP，登录用户名、登录密码，但是不配置机器间的免密登录，实现机器之间的文件传输。

Java 实现

1、工具类

ScpUtil.java

package com.miracle.luna.scp;import org.apache.sshd.client.SshClient;
import org.apache.sshd.client.session.ClientSession;
import org.apache.sshd.scp.client.ScpClient;
import org.apache.sshd.scp.client.ScpClientCreator;/*** @author Miracle Luna* @date 2021/7/19*/
public class ScpUtil {//    private static String host = "192.168.67.48";private static String host = "192.168.67.39";
//    private static String host = "192.168.71.29";private static String username = "root";private static String password = "password";private static Integer port = 22;//    private static String local = "F:\\miracle\\*";private static String local = "/home/miracle/*";private static String remote = "/home/luna/";
//    private static String remote = "F:\\luna\\";public static void scpFile(String local, String remote) throws Exception {long startTime = System.currentTimeMillis();// 创建 SSH客户端SshClient client = SshClient.setUpDefaultClient();// 启动 SSH客户端client.start();// 通过主机IP、端口和用户名，连接主机，获取SessionClientSession session = client.connect(username, host, port).verify().getSession();// 给Session添加密码session.addPasswordIdentity(password);// 校验用户名和密码的有效性boolean isSuccess = session.auth().verify().isSuccess();// 认证成功if (isSuccess) {long middleTime = System.currentTimeMillis();System.out.println("Connect host cost time: " + (middleTime - startTime) / 1000.0 + "s.");ScpClientCreator creator = ScpClientCreator.instance();// 创建 SCP 客户端ScpClient scpClient = creator.createScpClient(session);System.out.println("Scp beginning.");// ScpClient.Option.Recursive：递归copy，可以将子文件夹和子文件遍历copyscpClient.upload(local, remote, ScpClient.Option.Recursive);System.out.println("Scp finished.");// 释放 SCP客户端if (scpClient != null) {scpClient = null;}// 关闭 Sessionif (session != null && session.isOpen()) {session.close();}// 关闭 SSH客户端if (client != null && client.isOpen()) {client.stop();client.close();}}long endTime = System.currentTimeMillis();System.out.println("Total Cost time: " + (endTime - startTime) / 1000.0 + "s.");}public static void main(String[] args) throws Exception {scpFile(local, remote);}
}

2、运行结果

Connect host cost time: 6.519s.
Scp beginning.
Scp finished.
Total Cost time: 9.569s.

3、Maven依赖

<!-- https://mvnrepository.com/artifact/org.apache.sshd/sshd-common -->
<dependency><groupId>org.apache.sshd</groupId><artifactId>sshd-common</artifactId><version>2.7.0</version>
</dependency><!-- https://mvnrepository.com/artifact/org.apache.sshd/sshd-core -->
<dependency><groupId>org.apache.sshd</groupId><artifactId>sshd-core</artifactId><version>2.7.0</version>
</dependency><!-- https://mvnrepository.com/artifact/org.apache.sshd/sshd-scp -->
<dependency><groupId>org.apache.sshd</groupId><artifactId>sshd-scp</artifactId><version>2.7.0</version>
</dependency>