Java远程实现Linux文件内容读取

约定不等于承诺〃 2022-05-23 11:23 300阅读 0赞

//首先要下载com.jcraft.jsch\_0.1.31.jar  
package Test;

import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.InputStreamReader;  
import java.util.ArrayList;  
import java.util.List;

import com.jcraft.jsch.Channel;  
import com.jcraft.jsch.ChannelExec;  
import com.jcraft.jsch.JSch;  
import com.jcraft.jsch.JSchException;  
import com.jcraft.jsch.Session;  
/\*\*  
\*  
\* java 远程读取linux文件  
\* @author zhaochong  
\*/  
public class ShellUtil \{  
private static JSch jsch;  
private static Session session;

/**配置连接
     * @param user
     * @param passwd
     * @param host
     * @param post
     * @throws Exception
     */
    public static void connect(String user, String passwd, String host,int post) throws Exception {
        jsch = new JSch();
        session = jsch.getSession(user, host, post);
        if (session == null) {
            throw new Exception("session is null");
        }
        session.setPassword(passwd);
        java.util.Properties config = new java.util.Properties();
        //第一次登陆
        config.put("StrictHostKeyChecking", "no");
        session.setConfig(config);
        try {
            session.connect(30000);
        } catch (Exception e) {
            throw new Exception("连接远程端口无效或用户名密码错误");
        }
    
    }
    public static String[] getArr(String str){
        String[] arr  = str.split(":");
        return arr;
    }
    
    /**
     * @param command shell 命令
     * @param user 用户名
     * @param passwd 密码 
     * @param host ip地址
     * @param post 端口号
     * @throws Exception
     */
    public static void execCmd(String command, String user, String passwd, String host,int post) throws Exception {
        System.out.println(command);
        connect(user, passwd, host,post);
        BufferedReader reader = null;
        Channel channel = null;
        try {
                channel = session.openChannel("exec");
                ((ChannelExec) channel).setCommand(command);
    
                channel.setInputStream(null);
                ((ChannelExec) channel).setErrStream(System.err);
    
                channel.connect();
                InputStream in = channel.getInputStream();
                reader = new BufferedReader(new InputStreamReader(in));
                String buf = null;
                List<LoggerForm> list = new ArrayList<LoggerForm>();
                //返回数据
                while ((buf = reader.readLine()) != null) {
                    String[] arr = buf.split("\|");
                    for (int i = 0; i < arr.length; i++) {
                        System.out.println("异常时间:"+arr[1]+"错误信息:"+arr[2]+"异常类型:"+getArr(arr[0])[2]+"异常信息所在文件行数:"+getArr(arr[0])[1]+"日志文件名称:"+getArr(arr[0])[0]);
                    }
                }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSchException e) {
            e.printStackTrace();
        } finally {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            channel.disconnect();
            session.disconnect();
        }
    }