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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>
补充说明
该方式适用于Linux到Linux、Linux到Windows、Windows到Linux、Windows到Windows间的文件拷贝。
(和Windows进行文件交互的前提是:Windows安装了SSH服务端,如OpenSSH,FreeSSHd,Bitvise SSH Server等)