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

 

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);
    }
    
   
}