使用JSCH连接Linux服务器-执行linux命令

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在java中可以使用jsch连接远程Linux服务器，并在服务器上执行传送命令，同时该jar包也可以使用ftp在服务器上上传下载文件，本节讲述如何通过该jar包传送linux命令并且执行：

Java代码


package com.aliyun.utility.jsch;

import java.io.InputStream;

import java.util.Properties;

import com.jcraft.jsch.ChannelExec;

import com.jcraft.jsch.JSch;

import com.jcraft.jsch.Session;

public class JSCHUtil {

private static JSCHUtil instance;

public static JSCHUtil getInstance() {

if (instance == null) {

instance = new JSCHUtil();

}

return instance;

}

private JSCHUtil() {

}

private Session getSession(String host, int port, String ueseName)

throws Exception {

JSch jsch = new JSch();

Session session = jsch.getSession(ueseName, host, port);

return session;

}

public Session connect(String host, int port, String ueseName,

String password) throws Exception {

Session session = getSession(host, port, ueseName);

session.setPassword(password);

Properties config = new Properties();

config.setProperty("StrictHostKeyChecking", "no");

session.setConfig(config);

session.connect();

return session;

}

public String execCmd(Session session, String command) throws Exception {

if (session == null) {

throw new RuntimeException("Session is null!");

}

ChannelExec exec = (ChannelExec) session.openChannel("exec");

InputStream in = exec.getInputStream();

byte[] b = new byte[1024];

exec.setCommand(command);

exec.connect();

StringBuffer buffer = new StringBuffer();

while (in.read(b) > 0) {

buffer.append(new String(b));

}

exec.disconnect();

return buffer.toString();

}

public void clear(Session session) {

if (session != null && session.isConnected()) {

session.disconnect();

session = null;

}

}

public static void main(String[] args) throws Exception {

Session session = JSCHUtil.getInstance().connect("10.9.9.135", 22,

"yy", "yy");

String cmd = "cd /" + ";" + "ls -al |grep home";

String result = JSCHUtil.getInstance().execCmd(session, cmd);// 多条命令之间以;分隔

System.out.println(result);

System.exit(0);

}

}