使用JSCH连接Linux服务器(1)-执行linux命令
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：
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);}}