JAVA连接SFTP服务器报错：cn.hutool.extra.ssh.JschRuntimeException: JSchException: Packet corrupt

news/2025/11/14 18:07:37/文章来源:https://www.cnblogs.com/pxblog/p/19223001

以下就是报错信息而且是第一次没问题，第二次连接就会有问题

2025-11-15T01:39:32.602+08:00 cn.hutool.extra.ssh.JschRuntimeException: JSchException: Packet corrupt
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.JschUtil.createChannel(JschUtil.java:392) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.JschUtil.openChannel(JschUtil.java:367) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.JschUtil.openSftp(JschUtil.java:306) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.Sftp.init(Sftp.java:156) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.Sftp.init(Sftp.java:126) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.Sftp.init(Sftp.java:145) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.Sftp.<init>(Sftp.java:80) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.Sftp.<init>(Sftp.java:69) ~[hutool-all-5.7.6.jar!/:?]
2025-11-15T01:39:32.602+08:00 at cn.hutool.extra.ssh.Sftp.<init>(Sftp.java:55) ~[hutool-all-5.7.6.jar!/:?]

弃用hutool的Jsch

使用以下SSHJ

<dependency><groupId>com.hierynomus</groupId><artifactId>sshj</artifactId><version>0.37.0</version>
</dependency>

伪代码连接

import net.schmizz.sshj.SSHClient;
import net.schmizz.sshj.sftp.RemoteResourceInfo;
import net.schmizz.sshj.sftp.SFTPClient;
import net.schmizz.sshj.transport.verification.PromiscuousVerifier;public static List<String> getDownloadFileList(String server, int port, String user, String pass, String remotePath) {try (SSHClient ssh = new SSHClient()) {
        ssh.addHostKeyVerifier(new PromiscuousVerifier()); 
        ssh.connect(server, port);ssh.authPassword(user, pass);try (SFTPClient sftp = ssh.newSFTPClient()) {for (RemoteResourceInfo entry : sftp.ls(remotePath)) {//}}} catch (Exception e) {throw new RuntimeException("SFTP list failed", e);}
}