Java 操作 Linux 服务器 上传文件并执行脚本

一、本项目核心目的

(目前支持.sql 和 .py脚本,.java脚本跟.py脚本大同小异,只是命令不同)

  • 1.从A服务器获取脚本文件
  • 2.上传到B服务器指定文件夹
  • 3.通过命令执行上传后得脚本文件
  • 4.返回执行结果

二、核心jar包


        
            com.jcraft
            jsch
            0.1.54
        

      
            ch.ethz.ganymed
            ganymed-ssh2
            262
        

三、Spring Boot 与 nacos 版本不对应时会报错,当前Spring Boot版本为2.3.9.RELEASE

四、pom.xml 文件


        
            org.springframework.boot
            spring-boot-starter
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
            ch.ethz.ganymed
            ganymed-ssh2
            262
        
        
            com.alibaba.boot
            nacos-config-spring-boot-starter
            0.2.7
        
        
            org.projectlombok
            lombok
            1.18.20
        
        
            org.springframework
            spring-web
            5.2.12.RELEASE
        
        
            org.springframework.cloud
            spring-cloud-commons
            2.2.2.RELEASE
        
        
            org.springframework.cloud
            spring-cloud-context
            2.2.2.RELEASE
        
        
        
            com.jcraft
            jsch
            0.1.54
        
    

五、RemoteCommandConfig(服务器调用)

import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

@Slf4j
@Component
public class RemoteCommandConfig {

    /**
     * 只是用来测试,无其他用处
     */
    public static void main(String[] args) {
        Connection conn = login("这里填服务器IP地址", "账号", "密码");
        JSONObject execute = execute(conn, "cd /script/ &&mysql -vvv -uadmin -p123456 spring_data < 测试.sql");
        System.out.println(execute.toString());
    }

    private static String DEFAULTCHART = "UTF-8";

    /**
     * @return 登录成功返回true,否则返回false
     * @描述 登录主机
     */
    public static Connection login(String ip, String username, String password) {
        boolean flg;
        Connection conn = null;
        try {
            conn = new Connection(ip);
            conn.connect();//连接
            flg = conn.authenticateWithPassword(username, password);//认证
            if (flg) {
                return conn;
            }
        } catch (IOException e) {
            log.error("脚本执行登录服务器失败,error={}" + e.getMessage());
            e.printStackTrace();
        }
        return conn;
    }

    /**
     * @param cmd 即将执行的命令
     * @return 命令执行完后返回的结果值
     * @描述 远程执行shll脚本或者命令
     */
    public static JSONObject execute(Connection conn, String cmd) {
        JSONObject result = new JSONObject();
        result.put("code", 200);
        String str = "";
        try {
            if (conn != null) {
                Session session = conn.openSession();//打开一个会话
                session.execCommand(cmd);//执行命令
                str = 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(str)) {
                    result.put("code", 400);
                    result.put("msg", "得到标准输出为空,链接conn:" + conn + ",执行的命令:" + cmd);
                    str = processStdout(session.getStderr(), DEFAULTCHART);
                } else {
                    result.put("msg", 200);
                    result.put("msg", "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 + "  error={}" + e.getMessage());
        }
        result.put("data", str);
        return result;
    }

    /**
     * @param in      输入流对象
     * @param charset 编码
     * @return 以纯文本的格式返回
     * @描述 解析脚本执行返回的结果集
     */
    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;
            while ((line = br.readLine()) != null) {
                buffer.append(line + "\n");
            }
        } catch (Exception e) {
            log.error("解析脚本出错,error={}" + e.getMessage());
            e.printStackTrace();
        }
        return buffer.toString();
    }

六、RestTemplateConfig防止项目因为RestTemplate启动失败

import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class RestTemplateConfig {
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(RestTemplateBuilder builder){
        return builder.build();
    }
}

七、ScriptDealWithController (方法整合)

import ch.ethz.ssh2.Connection;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.nacos.api.config.annotation.NacosValue;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.sd.config.RemoteCommandConfig;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.http.*;
import org.springframework.util.CollectionUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.io.OutputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;


//nacos实时动态参数获取
@RefreshScope
@RestController
@RequestMapping("/script")
public class ScriptDealWithController {
    /**
     * 本项目所在服务器地址
     */
    @NacosValue(value = "${gyyh_login.ip}")
    private String gyyhIP;//登录获取ip
    @NacosValue(value = "${gyyh_login.username}")
    private String gyyhUsername;//系统账号
    @NacosValue(value = "${gyyh_login.password}")
    private String gyyhPassword;//系统密码
    /**
     * MySQL服务器地址
     */
    @NacosValue(value = "${mysql_script.ip}")
    private String myIp;//MySQL所在ip
    @NacosValue(value = "${mysql_script.username}")
    private String myUsername;//MySQL所在ip账号
    @NacosValue(value = "${mysql_script.password}")
    private String myPassword;//MySQL所在ip密码
    @NacosValue(value = "${mysql_script.command}")
    private String myCommand;//MySQL脚本执行命令
    @NacosValue(value = "${mysql_script.file_path}")
    private String myFilePath;//文件保存路径
    /**
     * pythonL服务器地址
     */
    @NacosValue(value = "${python_script.ip}")
    private String pyIp;//MySQL所在ip
    @NacosValue(value = "${python_script.username}")
    private String pyUsername;//MySQL所在ip账号
    @NacosValue(value = "${python_script.password}")
    private String pyPassword;//MySQL所在ip密码
    @NacosValue(value = "${python_script.command}")
    private String pyCommand;//MySQL脚本执行命令
    @NacosValue(value = "${python_script.file_path}")
    private String pyFilePath;//文件保存路径

    @Autowired
    private RestTemplate restTemplate;

    /**
     * @描述 获取平台登录token
     * @参数 []
     * @返回值 java.lang.String
     * @创建时间 2021/7/23
     */
    public String getToken() {
        String url = gyyhIP + "/获取token地址";
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        MultiValueMap params = new LinkedMultiValueMap<>();
        params.add("username", gyyhUsername);
        params.add("password", gyyhPassword);
        HttpEntity> requestEntity = new HttpEntity<>(params, headers);
        ResponseEntity response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class);
        JSONObject body = JSON.parseObject(response.getBody());
        JSONObject data = body.getJSONObject("data");
        if (CollectionUtils.isEmpty(data)) {
            throw new RuntimeException("token获取失败");
        }
        return data.getString("token");
    }

    /**
     * @描述 调用平台文件下载接口获取文件流
     * @参数 [body]
     * @返回值 byte[]
     * @创建时间 2021/7/23
     */
    public byte[] download(String token, String type, String downloadId) {
        String url = gyyhIP + "文件下载接口地址";
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        headers.set("Authorization", token);
        Map params = new HashMap<>();
        params.put("type", type);
        params.put("downloadId", downloadId);
        HttpEntity> requestEntity = new HttpEntity<>(params, headers);
        ResponseEntity response = restTemplate.postForEntity(url, requestEntity, byte[].class);
        return response.getBody();
    }

    /**
     * @描述 写入文件到指定目录下
     * @参数 [bfile, filePath, fileName]
     * @返回值 void
     * @创建时间 2021/7/23
     */
    public void upload(byte[] bfile, String ip, String username, String password, String filePath, String fileName) throws Exception {
        //服务器端口 默认22
        int port = 22;
        Session session = null;
        Channel channel = null;
        JSch jsch = new JSch();
        if (port <= 0) {
            //连接服务器,采用默认端口
            session = jsch.getSession(username, myIp);
        } else {
            //采用指定的端口连接服务器
            session = jsch.getSession(username, ip, port);
        }
        //如果服务器连接不上,则抛出异常
        if (session == null) {
            throw new Exception("session is null");
        }
        //设置登陆主机的密码
        session.setPassword(password);//设置密码
        //设置第一次登陆的时候提示,可选值:(ask | yes | no)
        session.setConfig("StrictHostKeyChecking", "no");
        //设置登陆超时时间
        session.connect(30000);
        OutputStream outstream = null;
        try {
            //创建sftp通信通道
            channel = session.openChannel("sftp");
            channel.connect(1000);
            ChannelSftp sftp = (ChannelSftp) channel;
            //进入服务器指定的文件夹
            sftp.cd(filePath);
            //以下代码实现从本地上传一个文件到服务器,如果要实现下载,对换以下流就可以了
            outstream = sftp.put(fileName);
            outstream.write(bfile);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            //关流操作
            if (outstream != null) {
                outstream.flush();
                outstream.close();
            }
            if (session != null) {
                session.disconnect();
            }
            if (channel != null) {
                channel.disconnect();
            }
        }
    }

    /**
     * @描述 脚本执行
     * @参数 [body]
     * @返回值 java.lang.String
     * @创建时间 2021/7/27
     */
    @PostMapping("/execute")
    public JSONObject execute(@RequestBody JSONObject body) throws Exception {
        String fileName = "";
        String type = body.getString("type");
        String downloadId = body.getString("downloadId");
        //脚本类型 sql 、python
        String languageType = body.getString("languageType");
        Connection conn = null;
        //执行脚本
        String cmd = "";

        //获取平台登录token
        String token = getToken();
        //调用平台文件下载接口获取文件流
        byte[] download = download(token, type, downloadId);
        if (StringUtils.equals("sql", languageType)) {
            cmd = myCommand;
            fileName = new Date().getTime() + ".sql";
            conn = RemoteCommandConfig.login(myIp, myUsername, myPassword);
            //写入文件到sql服务器指定目录下
            upload(download, myIp, myUsername, myPassword, myFilePath, fileName);
        } else if (StringUtils.equals("python", languageType)) {
            cmd = pyCommand;
            fileName = new Date().getTime() + ".py";
            conn = RemoteCommandConfig.login(pyIp, pyUsername, pyPassword);
            //写入文件到py服务器指定目录下
            upload(download, pyIp, pyUsername, pyPassword, pyFilePath, fileName);
        }
        //执行脚本
        return RemoteCommandConfig.execute(conn, cmd + fileName);
    }
}

八、启动类

import com.alibaba.nacos.api.config.ConfigType;
import com.alibaba.nacos.spring.context.annotation.config.NacosPropertySource;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@NacosPropertySource(dataId = "script_****", type = ConfigType.YAML,groupId = "DEFAULT_GROUP",autoRefreshed = true)
public class ScriptDealWithApplication {

    public static void main(String[] args) {
        SpringApplication.run(ScriptDealWithApplication.class, args);
    }

}

九、application.yml配置

server:
  port: 8001
nacos:
  config:
    server-addr: 101.***.**.**:8848  #Nacos 链接地址
    namespace: 55572fea-***-********************* #Nacos 命名空间ID

十、nacos配置

gyyh_login:
  ip: http://101.***.***.***:8088/
  username: admin
  password: 123456
mysql_script:
  ip: 192.168.**.***
  username: root
  password: vagrant
  file_path: /usr/local/script/
  command: cd /usr/local/script/ &&mysql -vvv -uroot -p123456 spring_data <
python_script:
  ip: 192.168.**.***
  username: root
  password: vagrant
  file_path: /usr/local/script/
  command: python /usr/local/script/

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