Jav程序执行Linux命令

怼烎@ 2022-05-14 00:57 200阅读 0赞

# 方法一： #

本地执行，也是是代码必须放在Lunix服务器上才能通过java代码执行Linux命令。

package com.xdja.dsc.common.util;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.util.ArrayList;
    import java.util.List;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    /**
     * 
     * @ClassName: ExecuteLinuxCommandUtils
     * @Description: 执行Linux命令工具类
     * @author niugang
     * @date 2018年8月30日
     */
    public class ExecuteLinuxCommandUtils {
    
    	private static Logger logger = 
     LoggerFactory.getLogger(ExecuteLinuxCommandUtils.class);
        	/**
    	 * 执行命令如：<br>
    	 * cd /usr/local/openresty/nginx/conf/ngx_conf/ && tar czf /tmp/ngx.tar.gz  * <br>
    	 * cp /usr/local/openresty/nginx/conf/nginx.conf  /tmp <br>
    	 * @param command:执行命令
    	 * @return    
    	 * @author niugang
    	 * @date 2018年8月30日
    	 * @throws NullPointerException
    	 */
    	public static String exc(String command) {
            String result = null;
    		Process ps = null;
    		BufferedReader br = null;
    		try {
    			if (command == null || "".equals(command)) {
    				throw new NullPointerException("command is not null");
    			}
    			List<String> comList = new ArrayList<String>(3);
    			comList.add("/bin/sh");
    			comList.add("-c");
    			comList.add(command);
    			logger.info("execute command is:{}", comList.toString());
    			String[] commandArray = comList.toArray(new String[comList.size()]);
    			ps = Runtime.getRuntime().exec(commandArray);
    			ps.waitFor();
                br = new BufferedReader(new InputStreamReader(ps.getInputStream()));
    			StringBuffer sb = new StringBuffer();
    			String line;
    			while ((line = br.readLine()) != null) {
    				sb.append(line).append("\n");
    			}
    			result = sb.toString();
    			br.close();
    			logger.info("execute linux command result:{}", result);
    		} catch (Exception ex) {
    			logger.error("execute linux command error:{}", ex);
    		} finally {
    			if (br != null) {
    				try {
    					br.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    		}
    		return result;
    	}
    
    }

# 方法二：远程连接 #

**pom.xml**

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

代码：

package com.xdja.dsc;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.OutputStream;
    
    import com.jcraft.jsch.ChannelShell;
    import com.jcraft.jsch.JSch;
    import com.jcraft.jsch.JSchException;
    import com.jcraft.jsch.Session;
    
    /**
     * 
     * @ClassName: TestSsh
     * @Description: ssh测试
     * @author niugang
     * @date 2018年8月28日
     */
    
    public class TestSsh {
    
    	/**
    	 * 远程执行JSch
    	 * @param args
    	 * @throws JSchException
    	 * @throws IOException    
    	 * @author niugang
    	 * @date 2018年8月30日
    	 * @throws
    	 */
    public static void main(String[] args) throws JSchException, IOException {
    		JSch jsch = new JSch();
    		Session session = jsch.getSession("root", "11.12.115.206", 22);
    		session.setPassword("123456");
    		session.setConfig("StrictHostKeyChecking", "no");
    		session.setConfig("userauth.gssapi-with-mic", "no");
    		session.connect();
    		ChannelShell channel = (ChannelShell) session.openChannel("shell");
    		channel.connect();
    		InputStream inputStream = channel.getInputStream();
    		OutputStream outputStream = channel.getOutputStream();
    
    		String cmd2 = "cd /home/xdja \n\r";
    		outputStream.write(cmd2.getBytes());
    		String cmd = "ll \n\r";
    		outputStream.write(cmd.getBytes());
    		outputStream.flush();
    		BufferedReader in = new BufferedReader(new InputStreamReader(inputStream));
    
    		String msg = null;
    		while ((msg = in.readLine()) != null) {
    			String encoding = getEncoding(msg);
    			System.out.println(new String(msg.getBytes(encoding), encoding));
    		}
    		in.close();
    	}
        public static String getEncoding(String str) {
    		String encode = "GB2312";
    		try {
    			if (str.equals(new String(str.getBytes(encode), encode))) { // 判断是不是GB2312
    				String s = encode;
    				return s; // 是的话，返回“GB2312“，以下代码同理
    			}
    			encode = "ISO-8859-1";
    			if (str.equals(new String(str.getBytes(encode), encode))) { // 判断是不是ISO-8859-1
    				String s1 = encode;
    				return s1;
    			}
    			encode = "UTF-8";
    			if (str.equals(new String(str.getBytes(encode), encode))) { // 判断是不是UTF-8
    				String s2 = encode;
    				return s2;
    			}
    			encode = "GBK";
    			if (str.equals(new String(str.getBytes(encode), encode))) { // 判断是不是GBK
    				String s3 = encode;
    				return s3;
    			}
    
    		} catch (Exception exception3) {
    
    		}
    		return "";
    	}// 如果都不是，说明输入的内容不属于常见的编码
    }

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