java的remote shell

时间:2021-11-10 07:50:53

http://www.ganymed.ethz.ch/ssh2/

此程序的目的是执行远程机器上的Shell脚本。

【环境参数】

远程机器IP:172.17.24.212

用户名:root

密码:zhenchaowen

Shell脚本的路径:/home/IFileGenTool /BakProvisionAndOccurEntrance.sh

【具体步骤】

1、在远程机器上,准备Shell脚本。

[root@localhost IFileGenTool]# vim ./load_data.sh

#!/bin/sh

source /etc/profile

dbName=$1

tableName=$2

echo [`date +'%Y-%m-%d %H:%M:%S'`]' start loading data...'

mysql -uroot -p123456 -P3306 ${dbName} -e "LOAD DATA LOCAL INFILE '/home/IFileGenTo    ol_ZhangJian/bak_data/t_acc_subject_provision_data_bak.txt' INTO TABLE ${tableName}     FIELDS TERMINATED BY ';'"

echo [`date +'%Y-%m-%d %H:%M:%S'`]' end loading data...'

exit

EOF

2、导入需要依赖的jar包。

Java远程调用Shell脚本这个程序需要ganymed-ssh2-build210.jar包。

下载地址:http://www.ganymed.ethz.ch/ssh2/

为了调试方便,可以将\ganymed-ssh2-build210\src下的代码直接拷贝到我们的工程里,

此源码的好处就是没有依赖很多其他的包,拷贝过来干干净净。

<dependency>

<groupId>org.jvnet.hudson</groupId>

<artifactId>ganymed-ssh2</artifactId>

<version>build210-hudson-1</version>

</dependency>

3、编写RemoteShellExecutor工具类。

import java.io.IOException;

import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.nio.charset.Charset;

import org.apache.commons.io.IOUtils;

import ch.ethz.ssh2.ChannelCondition;

import ch.ethz.ssh2.Connection;

import ch.ethz.ssh2.Session;

import ch.ethz.ssh2.StreamGobbler;

public class RemoteShellExecutor {

private Connection conn;

/** 远程机器IP */

private String ip;

/** 用户名 */

private String osUsername;

/** 密码 */

private String password;

private String charset = Charset.defaultCharset().toString();

private static final int TIME_OUT = 1000 * 5 * 60;

/**

* 构造函数

* @param ip

* @param usr

* @param pasword

*/

public RemoteShellExecutor(String ip, String usr, String pasword) {

this.ip = ip;

this.osUsername = usr;

this.password = pasword;

}

/**

* 登录

* @return

* @throws IOException

*/

private boolean login() throws IOException {

conn = new Connection(ip);

conn.connect();

return conn.authenticateWithPassword(osUsername, password);

}

/**

* 执行脚本

*

* @param cmds

* @return

* @throws Exception

*/

public int exec(String cmds) throws Exception {

InputStream stdOut = null;

InputStream stdErr = null;

String outStr = "";

String outErr = "";

int ret = -1;

try {

if (login()) {

// Open a new {@link Session} on this connection

Session session = conn.openSession();

// Execute a command on the remote machine.

session.execCommand(cmds);

stdOut = new StreamGobbler(session.getStdout());

outStr = processStream(stdOut, charset);

stdErr = new StreamGobbler(session.getStderr());

outErr = processStream(stdErr, charset);

session.waitForCondition(ChannelCondition.EXIT_STATUS, TIME_OUT);

System.out.println("outStr=" + outStr);

System.out.println("outErr=" + outErr);

ret = session.getExitStatus();

} else {

throw new Exception("登录远程机器失败" + ip); // 自定义异常类 实现略

}

} finally {

if (conn != null) {

conn.close();

}

IOUtils.closeQuietly(stdOut);

IOUtils.closeQuietly(stdErr);

}

return ret;

}

/**

* @param in

* @param charset

* @return

* @throws IOException

* @throws UnsupportedEncodingException

*/

private String processStream(InputStream in, String charset) throws Exception {

byte[] buf = new byte[1024];

StringBuilder sb = new StringBuilder();

while (in.read(buf) != -1) {

sb.append(new String(buf, charset));

}

return sb.toString();

}

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

RemoteShellExecutor executor = new RemoteShellExecutor("172.17.24.212", "root", "zhenchaowen");

// 执行myTest.sh 参数为java Know dummy

System.out.println(executor.exec("/home/IFileGenTool/load_data.sh t_users myDataBase01"));

}

}

4、运行结果

outStr=java Know 3

outErr=

0 // getExitStatus方法的返回值

注:一般情况下shell脚本正常执行完毕,getExitStatus方法返回0。

此方法通过远程命令取得Exit Code/status。但并不是每个server设计时都会返回这个值,如果没有则会返回null。

在调用getExitStatus时,要先调用WaitForCondition方法,通过ChannelCondition.java接口的定义可以看到每个条件的具体含义。见以下代码:

ChannelCondition.java的源代码

备注:

https://github.com/super-d2/remoteShell