JSch是一个纯Java实现的SSH2协议的客户端库。它允许您在Java应用程序中进行安全的远程登录、文件传输和执行命令。您可以使用JSch来连接到远程服务器并执行各种操作。 导入pom包
代码语言：javascript复制 <dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.55</version>
</dependency>执行命令相关操作
特别注意⚠️代码里面配置的是exec渠道
代码语言：javascript复制 // write a create file directory function
public static void cmdCreateFileDirectory(final String path, final String serverUser, final String serverPassword) {
String command = "mkdir -p " path;
int exitValue = 0;
long startTime = System.currentTimeMillis();
final StringBuilder result = new StringBuilder();
try {
JSch jsch = new JSch();
Session session = jsch.getSession(serverUser, "127.0.0.1", 22);
session.setPassword(serverPassword);
session.setConfig("StrictHostKeyChecking", "no");
session.connect();
Channel channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
channel.setInputStream(null);
((ChannelExec) channel).setErrStream(System.err);
InputStream in = channel.getInputStream();
channel.connect();
byte[] tmp = new byte[1024];
while (true) {
while (in.available() > 0) {
int i = in.read(tmp, 0, 1024);
if (i < 0) break;
result.append(new String(tmp, 0, i));
}
if (channel.isClosed()) {
if (in.available() > 0) continue;
exitValue = channel.getExitStatus();
log.debug("exit-status: {}", exitValue);
break;
}
try {
Thread.sleep(100);
} catch (Exception ee) {
}
}
channel.disconnect();
session.disconnect();
if (exitValue != 0) {
log.error("create file directory error: " exitValue " " command);
}
log.info(" create file directory success, command: {}, content:{} total cost time:{}", command,
result.toString(), System.currentTimeMillis() - startTime);
} catch (JSchException e) {
log.error(e.getMessage(), e);
} catch (IOException e) {
log.error(e.getMessage(), e);
}
}执行上传文件和配置权限
特别注意⚠️代码里面配置是sftp渠道
代码语言：javascript复制/**
* 使用账户登陆方式创建文件
* @param fileName
* @param path
* @param content
* @param username
* @param password
* @return
*/
private static boolean processTargetFileAndAuth(String fileName, String path, byte[] content, String username,
String password) {
JSch jsch = new JSch();
Session session = null;
Channel channel = null;
ChannelSftp channelSftp = null;
// Read, write, and execute permissions for owner, group, and others
int permissions = 0777;
try {
session = jsch.getSession(username, "127.0.0.1", 22);
session.setPassword(password);
session.setConfig("StrictHostKeyChecking", "no");
session.connect();
channel = session.openChannel("sftp");
channel.connect();
channelSftp = (ChannelSftp) channel;
// Check if the directory exists
try {
channelSftp.stat(path);
log.debug("Directory already exists.");
} catch (SftpException e) {
// Create the directory if it does not exist
channelSftp.mkdir(path);
log.debug("Directory created successfully.");
}
// Change to the new directory
channelSftp.cd(path);
// Create the file
channelSftp.put(new ByteArrayInputStream(content), fileName);
channelSftp.chmod(permissions, fileName);
log.info("Directory:{} and file:{} created successfully.", path, fileName);
} catch (JSchException | SftpException e) {
log.error("Failed to create", e);
return false;
} finally {
if (channelSftp != null) {
channelSftp.disconnect();
}
if (channel != null) {
channel.disconnect();
}
if (session != null) {
session.disconnect();
}
}
return true;
}总结
JSch是一个功能强大且广泛使用的Java SSH客户端库，它提供了许多有用的功能和API，可以轻松地实现SSH连接、文件传输和执行命令等操作。JSch的文档和示例非常详细，易于使用和理解。然而，一些用户可能会发现JSch的学习曲线比较陡峭，需要一些时间来掌握其工作原理和API。总体而言，JSch是一个非常优秀的Java SSH客户端库，适用于各种SSH连接和文件传输方案。
