java SFTP下载,读取linux服务器文件

一 SFTP下载,读取linux服务器文件

1 导入依赖

        <dependency>
            <groupId>org.apache.camelgroupId>
            <artifactId>camel-ftpartifactId>
            <version>2.13.2version>
        dependency>
        <dependency>
            <groupId>net.sourceforge.javacsvgroupId>
            <artifactId>javacsvartifactId>
            <version>2.0version>
        dependency>

2 LakLaBillDownload.java

/*
 * Copyright 2019 Wicrenet, Inc. All rights reserved.
 */
package com.xy.pay.core.joint.lakla.trade.bill;

/**
 * 【拉卡拉账单拉取】
 *
 * @author YJX
 * Created on 2019-06-26 18:32
 */

import com.jcraft.jsch.*;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Properties;

@Component
class LakLaBillDownload {

    private static final Logger logger       = LoggerFactory.getLogger(LakLaBillDownload.class);
    private static final String SFTPPATH     = "/sftp/bill/fzxya/"; // SFTP 拉卡拉服务器账单绝对路径
    private static final String SFTPUSERNAME = "xxxxx";             // SFTP 拉卡拉用户名
    private static final String SFTPHOST     = "xxx.xxx.xxx"; 	    // SFTP 拉卡拉账单服务器IP地址
    private static final int    SFTPPORT     = 22;                  // SFTP 端口
    private static final String SFTPPASSWORD = "xxxxx";             // SFTP 拉卡拉密码

    /**
     * 拉卡拉账单拉取
     *
     * @param sfileName 拉卡拉服务器账单名称
     * @param billFile  自己公司服务器存拉卡拉账单路径
     **/
    static File downloadLaKLaBill(String sfileName, Resource billFile) {
        try {
            //远程主机绝对路径+文件名称  格式:  /sftp/bill/fzxya/TF_机构号_YYYYMMDD.txt
            String sftpBillResources = SFTPPATH + sfileName;
            Session session;
            Channel channel;
            JSch jsch = new JSch();
            session = jsch.getSession(SFTPUSERNAME, SFTPHOST, SFTPPORT);
            session.setPassword(SFTPPASSWORD);
            session.setTimeout(100000);
            Properties config = new Properties();
            config.put("StrictHostKeyChecking", "no");
            session.setConfig(config);

            if (!session.isConnected()) {
                session.connect();
            }

            channel = session.openChannel("sftp");
            if (!channel.isConnected()) {
                channel.connect();
            }

            ChannelSftp chSftp = (ChannelSftp) channel;
            try {
                // 将服务器指定文件转成流
                InputStream inputStream = chSftp.get(sftpBillResources);

                // 将流转成文件黏贴到billFile.getFile(保存到自己的服务器)
                FileUtils.copyToFile(inputStream, billFile.getFile());
				
				//返回文件流
                return billFile.getFile();

            } catch (SftpException fe) {
                if (fe.toString().contains("No such file")) {
                    logger.error("拉卡拉账单拉取,拉卡拉服务器不存在该文件:{}", fe);
                    return null;
                }
                logger.error("卡拉账单拉取,错误:{}", fe);
            } catch (UnsupportedEncodingException ue) {
                logger.error("拉卡拉账单拉取,不支持的编码错误:{}", ue);
            } catch (IOException ie) {
                logger.error("拉卡拉账单拉取,IO错误:{}", ie);
            } finally {
                //关闭持久连接
                chSftp.quit();
                channel.disconnect();
                session.disconnect();
            }
            return null;
        } catch (JSchException jsche) {
            logger.error("拉卡拉账单拉取,连接拉卡拉服务器错误:{}", jsche);
        }
        return null;
    }

}

3 LaklaTradeBillService.java

package com.xy.pay.core.joint.lakla.trade.bill;

import com.xy.common.msg.Message;
import com.xy.common.msg.Msg;
import com.xy.common.verify.Asserts;
import com.xy.pay.core.PayEnvironment;
import com.xy.pay.core.exception.XyPayException;
import com.xy.pay.core.joint.JointTradeBillService;
import com.xy.pay.core.joint.lakla.LaklaTradeService;
import com.xy.pay.core.joint.lakla.model.LaklaTradeBill;
import com.xy.pay.core.joint.lakla.model.LaklaTradeBillResponse;
import com.xy.pay.core.structure.plugin.LakLaBillParseStrategy;
import org.joda.time.LocalDate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Service;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 拉卡拉账单下载
 *
 * @author YJX
 * @date 2019/5/14 15:10
 */
@Service
@Qualifier("lakla")
public class LaklaTradeBillService extends LaklaTradeService implements JointTradeBillService<LaklaTradeBill, LaklaTradeBillResponse> {

    private static final Logger                 logger = LoggerFactory.getLogger(LaklaTradeBillService.class);
    @Autowired
    private              PayEnvironment         payEnvironment;
    private static final Lock                   LOCK   = new ReentrantLock();
    @Autowired(required = false)
    private              LakLaBillParseStrategy lakLaBillParseStrategy;

    /**
     * 账单下载
     */
    @Override
    public Msg<LaklaTradeBillResponse> download(LaklaTradeBill tradeBill) {
        Asserts.notNull(tradeBill);
        Asserts.notNull(tradeBill.getBill_date());
        // 对账单文件格式：TF_机构号_YYYYMMDD.txt（YYYYMMDD为产生对账单的文件）
        String fileName = "TF_829203_" + LocalDate.parse(tradeBill.getBill_date().toString()).toString("yyyyMMdd") + ".txt";

        //没有配置下载路径，就不下载
        if (this.payEnvironment.getLaklaBillDownloadPath() == null) {
            throw new XyPayException("没有配置拉卡拉账单下载路径");
        }

        try {
            String dirName = LocalDate.parse(tradeBill.getBill_date().toString()).toString("yyyy-MM-dd");
            //创建目录
            createDir(dirName);

            //删除历史
            removeHistoryBill(fileName, dirName);

            //生成路径
            Resource billFile = this.payEnvironment.getLaklaBillDownloadPath().createRelative(dirName + "/" + fileName);

            File file = LakLaBillDownload.downloadLaKLaBill(fileName, billFile);

            //请求账单生成
            return this.lakLaBillParseStrategy.parse(file, tradeBill.getAppInfo().getAccount());

        } catch (IOException e) {
            logger.error("拉卡拉账单下载错误:{}", e);
        }
        return Message.getError("账单获取错误");
    }

    /**
     * 创建目录,如果目录不存在
     */
    private void createDir(String dirName) throws IOException {
        Resource dirFile = this.payEnvironment.getLaklaBillDownloadPath().createRelative(dirName);
        if (dirFile.exists() && dirFile.getFile().isDirectory()) {
            return;
        }

        try {
            Asserts.state(LOCK.tryLock(10, TimeUnit.SECONDS));
        } catch (Exception e) {
            logger.error(" 创建目录,如果目录不存在 - 获取锁失败", e);
        }
        try {
            if (dirFile.exists() && dirFile.getFile().isDirectory()) {
                return;
            }

            boolean flag = dirFile.getFile().mkdirs();
            if (!flag) {
                throw new IOException("拉卡拉账单-目录创建失败");
            }
        } finally {
            LOCK.unlock();
        }
    }

    /**
     * 移除存在的账单
     *
     * @param fileName
     */
    private void removeHistoryBill(String fileName, String dirName) throws IOException {

        if (!this.payEnvironment.getLaklaBillDownloadPath().exists()) {
            try {
                try {
                    Asserts.state(LOCK.tryLock(10, TimeUnit.SECONDS));
                } catch (Exception e) {
                    logger.error("移除存在的账单 - 获取锁失败", e);
                }
                if (!this.payEnvironment.getLaklaBillDownloadPath().exists()) {   //双重验证
                    boolean flag = this.payEnvironment.getLaklaBillDownloadPath().getFile().mkdirs();
                    if (!flag) {
                        throw new IOException("拉卡拉账单-创建目录失败");
                    }
                }
            } finally {
                LOCK.unlock();
            }
        }

        Resource oldFile = this.payEnvironment.getLaklaBillDownloadPath().createRelative(dirName + "/" + fileName);
        if (oldFile.exists()) {
            boolean flag = oldFile.getFile().delete();
            if (!flag) {
                logger.error("拉卡拉账单-历史账单删除失败");
            }
        }
    }

}