这篇文章主要介绍了通过Java实现bash命令过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
1、BASH 命令简介
2、Java实现 BASH命令执行Shell脚本
1）代码实现如下：
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public class BashUtil {
private Logger logger = LoggerFactory.getLogger(BashUtil.class);
private String hostname;
private String username;
private String password;
private int port;
private Connection conn;
private BashUtil() {
}
public BashUtil(String hostname, String username, String password) {
this(hostname, username, password, 22);
}
public BashUtil(String hostname, String username, String password, Integer port) {
this.hostname = hostname;
this.username = username;
this.password = password;
if (port == null) {
port = 22;
} else {
this.port = port;
}
}
/**
* 创建连接并认证
* @return
*/
public Boolean connection() {
try {
conn = new Connection(hostname, port);
conn.connect();
boolean isAuthenticated = conn.authenticateWithPassword(username, password);
return isAuthenticated;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 关闭连接
*/
public void close() {
try {
conn.close();
conn = null;
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 执行shell命令
* @param command
* @return
*/
public List<String> command(String command) {
if (conn == null && !connection()) {
logger.error("Authentication failed.");
return null;
}
List<String> result = new ArrayList<String>();
try {
Session sess = conn.openSession();
sess.execCommand(command);
InputStream stdout = new StreamGobbler(sess.getStdout());
InputStream stderr = new StreamGobbler(sess.getStderr());
BufferedReader br_out = new BufferedReader(new InputStreamReader(stdout, "utf-8"));
BufferedReader br_err = new BufferedReader(new InputStreamReader(stderr, "utf-8"));
StringBuffer sb_err = new StringBuffer();
String line = null;
while ((line = br_out.readLine()) != null) {
result.add(line.trim());
}
while ((line = br_err.readLine()) != null) {
sb_err.append(line + "\n");
}
if (isNotEmpty(sb_err.toString())) {
logger.error(sb_err.toString());
return null;
}
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
private static boolean isEmpty(String content) {
if (content == null) {
return true;
} else {
return "".equals(content.trim()) || "null".equalsIgnoreCase(content.trim());
}
}
private static boolean isNotEmpty(String content) {
return !isEmpty(content);
}
public static void main(String[] args){
String hostname = "192.168.123.234"; // 此处根据实际情况，换成自己需要访问的主机IP
String userName = "root";
String password = "password";
Integer port = 22;
String command = "cd /home/miracle&&pwd&&ls&&cat luna.txt";
BashUtil bashUtil = new BashUtil(hostname, userName, password, port);
List<String> resultList = bashUtil.command(command);
StringBuffer result = new StringBuffer("");
resultList.forEach(str -> result.append(str + "\n"));
System.out.println("执行的结果如下: \n" + result.toString());
}
}
2）执行结果如下：
执行的结果如下: /home/miracle luna.txt Hello, I'm SshUtil. Nice to meet you.^_^
3）pom.xml引用依赖包如下：
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.21</version>
</dependency>
<!-- ssh -->
<dependency>
<groupId>ch.ethz.ganymed</groupId>
<artifactId>ganymed-ssh2</artifactId>
<version>262</version>
</dependency>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
