从服务器上下载数据到本地

package net.tensortec.imagestock.task;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date; 

import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.trilead.ssh2.Connection;
import com.trilead.ssh2.SCPClient;
import com.trilead.ssh2.Session;
import com.trilead.ssh2.StreamGobbler;
import net.tensortec.imagestock.bean.Message;
import net.tensortec.imagestock.entity.AliyunImage;
import net.tensortec.imagestock.entity.UploadLog;
import net.tensortec.imagestock.mapper.AliyunImageMapper;
import net.tensortec.imagestock.mapper.UploadLogMapper;
import net.tensortec.imagestock.util.ImageUtil3;
@Component
@Configuration      //1.主要用于标记配置类，兼备Component的效果。
@EnableScheduling   // 2.开启定时任务
public class AliyunImageTask{
    /*public static void main(String[] args) throws Exception{//例子
        
        Calendar now = Calendar.getInstance();
        Integer year = now.get(Calendar.YEAR);//获取当前的年
        Integer month = now.get(Calendar.MONTH)+1;//获取当前的月
        String month2 = "";
        if(month<10) {
            month2="0"+month.toString();
        }
        
        String downDate = year.toString()+month2;//当天的日期
        
        Connection con = new Connection("服务器ip");
        ConnectionInfo connect = con.connect();
        boolean isAuthed = con.authenticateWithPassword("root", "密码");
        if(!isAuthed) {
            System.out.println("远程服务器连接失败");
        }
        
        SCPClient scpClient = con.createSCPClient();//【2-1】建立SCP客户端，执行封装的方法  
        
        //scpClient.get("/mnt/pics/pics/2019080100/*", "/home/imgdb/imagestock/imagestock/aliyun_zip"); //从服务器获取文件 
        
        Session session = con.openSession(); //【2-2.1】开启会话，执行原生linux命令 
        
        session.execCommand("ls /mnt/pics/pics/2019080100/");//进入目录
        InputStream stdout = new StreamGobbler(session.getStdout());  

        BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); 
        
        while (true) { 
            String line = br.readLine(); 
            if (line == null) { 
                break; 
            } 
            scpClient.get("/mnt/pics/pics/2019080100/"+line, "/home/imgdb/imagestock/imagestock/aliyun_zip");
            System.out.println("line:"+line);
        } 
        br.close();
         
        System.out.println("ExitCode: " + session.getExitStatus()); //获得退出状态
        
        session.close();//关闭会话 

        con.close();//【3】关闭连接 
    }*/
    @Autowired
    private UploadLogMapper uploadLogMapper;//日志mapper
    
    @Autowired
    private AliyunImageMapper aliyunImageMapper;//存放图片表的mapper
    
    //@Scheduled(cron = "0 42 9 ? * *")

    //@Scheduled(cron = "*/60 * * ? * *")
    @Scheduled(cron = "0 0 8,16,23 * * ?")//8,16,23点分别执行
    @Transactional
    public void sss()throws Exception {
        System.out.println("------------阿里云服务器自动下载图片开始----------");
        Calendar now = Calendar.getInstance();
        Integer year = now.get(Calendar.YEAR);//获取当前的年
        Integer month = now.get(Calendar.MONTH)+1;//获取当前的月
        Integer day = now.get(Calendar.DAY_OF_MONTH);
        String month2 = month.toString();
        String day2=day.toString();
        if(month<10) {//如果小于10月就在前面加0，如07月
            month2="0"+month2;
        }
        if(day<10) {//和月同理
            day2="0"+day2;
        }
        String downDate = year.toString()+month2+day2;//当天的日期
        Connection con = new Connection("要连接的服务器ip");//要去连接的服务器
        con.connect();
        System.out.println("链接中");
        boolean isAuthed = con.authenticateWithPassword("用户名", "密码");
        if(!isAuthed) {
            System.out.println("远程服务器连接失败");
        }
        
        SCPClient scpClient = con.createSCPClient();//【2-1】建立SCP客户端，执行封装的方法  
         
         Session session = con.openSession(); //【2-2.1】开启会话，执行原生linux命令 
         
         session.execCommand("ls /mnt/pics/pics/"+downDate+"*/*.jpg");//进入目录
         InputStream stdout = new StreamGobbler(session.getStdout());  
        BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); 
        
        UploadLog uploadLog = new UploadLog();
        uploadLog.setUploadBy(18);
        uploadLog.setAction("从120服务器下载当天的图片");
        uploadLog.setRemark("自动下载："+new SimpleDateFormat("yyyy-MM-dd").format(new Date()));
        uploadLogMapper.insert(uploadLog);
         while (true) { 
             String line = br.readLine(); 
             if (line == null) { 
                 break; 
             } 
             if (line.toString().contains(":")) {
                continue;
            }
             scpClient.get("//"+line, "/home/imgdb/imagestock/imagestock/aliyun_zip");
             
         } 
         InputStream in = null;
         
        //从当前目录上传文件并删除当前文件
        File file = new File("/home/imgdb/imagestock/imagestock/aliyun_zip/");
        File[] files=file.listFiles();//获取当前文件下的所有文件
        
        for(int k=0;k<files.length;k++){
           String fromName=files[k].getName();
           in = new BufferedInputStream(new FileInputStream("/home/imgdb/imagestock/imagestock/aliyun_zip/"+fromName+""));    
           MultipartFile multipartFile = new MockMultipartFile("/home/imgdb/imagestock/imagestock/aliyun_zip/"+fromName+"", in);
           upload(multipartFile, 18,uploadLog);
           files[k].delete();
        }
        System.out.println("------------阿里云服务器自动下载图片结束----------");
         br.close();
          
         System.out.println("ExitCode: " + session.getExitStatus()); //获得退出状态
         
         session.close();//关闭会话 

         con.close();//【3】关闭连接 
            
    }
    
    @Transactional
    public Message<AliyunImage> upload(MultipartFile multipartFile, Integer userId, UploadLog uploadLog) throws IOException {
      Message<AliyunImage> msg = Message.success();
      
      ImageUtil3 imageUtil3 = new ImageUtil3(multipartFile);
      boolean already = !aliyunImageMapper.selectList(new QueryWrapper<AliyunImage>().eq("hash_code", imageUtil3.getHashCode())).isEmpty();

      if (already) {
          msg.addError("图片已存在 " + imageUtil3.getFileName());
          return msg;
      }

      String imageName = multipartFile.getName();
      int idx = imageName.lastIndexOf(".");
        String originalName = imageName.substring(0,idx);
        String extendName = imageName.substring(idx+1);
      
      imageUtil3.saveFile(extendName);
      AliyunImage image = new AliyunImage();
      image.setHashCode(imageUtil3.getHashCode());
      image.setPath(imageUtil3.relativePath());
      image.setOriginalName(originalName);
      image.setExtendName(extendName);
      image.setFormat("image/"+extendName);
      image.setUploadBy(userId);
      
      image.setVersion(1); 
      image.setLogId(uploadLog.getId());
      if (aliyunImageMapper.insert(image) >= 1) {
      } else {
          File file = new File(imageUtil3.saveLocation());
          if (file.exists()) {
              FileUtils.deleteDirectory(file);
          }
      }
      return msg;
  }
}