远程执行服务器端命令程序(jsch实现)

服务器端命令程序(jsch实现)"/>

远程执行服务器端命令程序(jsch实现)

        通过jsch可以实现基于sftp协议的文件传输，使用的是ChannelSftp类，如果要在程序中实现启动服务器的一个脚本，执行某个系统命令的话，就需要用到另一个channel类了，就是ChannelExec类。

        如果项目采用maven构建的话，引入

<dependency><groupId>com.jcraft</groupId><artifactId>jsch</artifactId><version>0.1.50</version>
</dependency>

        代码示列：

package com.lipl;import com.jcraft.jsch.*;import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;/*** @author lipenglong* @ClassName:* @Description: this is a class desc.* @date 14-4-1 上午10:44*/
public class JschCommand {private Session session = null;private Channel channel = null;private String sftpHost = "localhost";private int sftpPort = 22;private String sftpUserName = "petric";private String sftpPassword = "123";private int timeout = 30000;/*** 获取连接* @return*/private ChannelExec getChannelExec() {try {if (channel != null && channel.isConnected()) {return (ChannelExec) channel;}JSch jSch = new JSch();if (session == null || !session.isConnected()) {session = jSch.getSession(sftpUserName, sftpHost, sftpPort);session.setPassword(sftpPassword);Properties config = new Properties();config.put("StrictHostKeyChecking", "no");session.setConfig(config);session.setTimeout(timeout);session.connect();}channel = session.openChannel("exec");} catch (Exception e) {if (session != null) {session.disconnect();session = null;}channel = null;}return channel == null ? null : (ChannelExec) channel;}/*** 关闭连接*/private void closeChannel() {try {if (channel != null) {channel.disconnect();channel = null;}if (session != null) {session.disconnect();session = null;}} catch (Exception e) {System.out.println(e);}}/*** 执行服务器端命令*/public boolean executeCommand(String command) {boolean flag = false;ChannelExec channelExec = getChannelExec();if (channelExec == null) {return false;}try {channelExec.setInputStream(null);channelExec.setErrStream(System.err);channelExec.setCommand(command);InputStream in = channelExec.getInputStream();channelExec.connect();BufferedReader reader = new BufferedReader(new InputStreamReader(in, "utf-8"));String line = null;while ((line = reader.readLine()) != null) {System.out.println(line);}reader.close();closeChannel();flag = true;} catch (Exception e) {System.out.println(e);flag = false;}return flag;}public static void main(String[] args) {JschCommand jschCommand = new JschCommand();System.out.println(jschCommand.executeCommand("date"));System.out.println("----------------------------------");System.out.println(jschCommand.executeCommand("ruby Demo.rb"));System.out.println("----------------------------------");System.out.println(jschCommand.executeCommand("touch abc.txt"));System.out.println("----------------------------------");System.out.println(jschCommand.executeCommand("rm abc.txt"));}
}

通过ChannelExec类可以实现执行服务器命令，如date， touch， rm等，可以执行服务器上我们写好的某个脚本，如Demo.rb。