Java实现远程连接Linux并执行命令

骑猪看日落 2022-05-31 06:07 263阅读 0赞

需要的jar包

<dependency>
            <groupId>ch.ethz.ganymed</groupId>
            <artifactId>ganymed-ssh2</artifactId>
            <version>${ganymed-ssh2}</version>
        </dependency>
         <dependency>  
            <groupId>commons-io</groupId>  
            <artifactId>commons-io</artifactId>  
            <version>${commons-io}</version>  
            <type>jar</type>  
            <scope>compile</scope>  
        </dependency>  
        <dependency>  
            <groupId>commons-lang</groupId>  
            <artifactId>commons-lang</artifactId>  
            <version>${commons-lang}</version>  
            <type>jar</type>  
            <scope>compile</scope>  
        </dependency>

连接及执行命令代码

package com.kpatch.utils;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.UnsupportedEncodingException;
    
    import org.apache.commons.lang.StringUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import ch.ethz.ssh2.Connection;
    import ch.ethz.ssh2.Session;
    import ch.ethz.ssh2.StreamGobbler;
    
    public class RemoteCommandUtil { 
    
        private static final Logger log = LoggerFactory.getLogger(RemoteCommandUtil.class);
        private static String  DEFAULTCHART="UTF-8"; 
    
        /** * 登录主机 * @return * 登录成功返回true，否则返回false */  
        public static Connection login(String ip,
                                String userName,
                                String userPwd){  
    
            boolean flg=false;
            Connection conn = null;
            try {  
                conn = new Connection(ip);  
                conn.connect();//连接 
                flg=conn.authenticateWithPassword(userName, userPwd);//认证 
                if(flg){
                    log.info("=========登录成功========="+conn);
                    return conn;
                }
            } catch (IOException e) {  
                log.error("=========登录失败========="+e.getMessage());
                e.printStackTrace();  
            }  
            return conn;  
        }  
    
        /** * 远程执行shll脚本或者命令 * @param cmd * 即将执行的命令 * @return * 命令执行完后返回的结果值 */  
        public static String execute(Connection conn,String cmd){  
            String result="";  
            try {  
                if(conn !=null){  
                    Session session= conn.openSession();//打开一个会话 
                    session.execCommand(cmd);//执行命令 
                    result=processStdout(session.getStdout(),DEFAULTCHART);  
                    //如果为得到标准输出为空，说明脚本执行出错了 
                    if(StringUtils.isBlank(result)){
                        log.info("得到标准输出为空,链接conn:"+conn+",执行的命令："+cmd);
                        result=processStdout(session.getStderr(),DEFAULTCHART);  
                    }else{
                        log.info("执行命令成功,链接conn:"+conn+",执行的命令："+cmd);
                    }  
                    conn.close();  
                    session.close();  
                }  
            } catch (IOException e) {
                log.info("执行命令失败,链接conn:"+conn+",执行的命令："+cmd+" "+e.getMessage());
                e.printStackTrace();  
            }  
            return result;  
        }
        /** * 解析脚本执行返回的结果集 * @param in 输入流对象 * @param charset 编码 * @return * 以纯文本的格式返回 */  
         private static String processStdout(InputStream in, String charset){  
             InputStream  stdout = new StreamGobbler(in);  
             StringBuffer buffer = new StringBuffer();;  
             try {  
                 BufferedReader br = new BufferedReader(new InputStreamReader(stdout,charset));  
                 String line=null;  
                 while((line=br.readLine()) != null){  
                     buffer.append(line+"\n");  
                 }  
             } catch (UnsupportedEncodingException e) { 
                 log.error("解析脚本出错："+e.getMessage());
                 e.printStackTrace();  
             } catch (IOException e) {
                 log.error("解析脚本出错："+e.getMessage());
                 e.printStackTrace();  
             }  
             return buffer.toString();  
         }  
    }