JAVA兼容SFTP传输文件

最新推荐文章于 2025-06-25 14:52:14 发布

lkq冷空气

最新推荐文章于 2025-06-25 14:52:14 发布

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CC 4.0 BY-SA版权

文章标签： sftp java

本文链接：https://blog.youkuaiyun.com/strophe/article/details/105792465

本文介绍了一个基于JSch库的SFTP上传下载类SftpWorker的实现细节，该类提供了一系列方法用于处理SFTP连接、文件上传和下载操作，并通过自定义异常处理上传下载过程中的错误。

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依赖包:com.jcraft.jsch

import com.common.exception.sftp.SftpConnectException;
import com.common.exception.sftp.SftpDowloadException;
import com.common.exception.sftp.SftpOperateException;
import com.common.exception.sftp.SftpUploadException;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.SftpException;
import lombok.extern.slf4j.Slf4j;

import java.io.*;

/**
 * Sftp上传下载
 * @author lkq
 */
@Slf4j
public class SftpWorker extends Operate {

    private String host;

    private int port;

    private String userName;

    private String password;

    public static SftpWorker getInstance(){
        return new SftpWorker();
    }

    public SftpWorker option(String host, int port, String userName, String password){
        this.host = host;
        this.port = port;
        this.userName = userName;
        this.password = password;
        return this;
    }

    @Override
    public void upload(InputStream in, String module, String fileName) throws SftpUploadException, SftpConnectException, SftpOperateException {

        cdUpload();

        try {
            this.sftp.cd(module);
        } catch (SftpException e) {
            try {
                this.sftp.mkdir(module);
                this.sftp.cd(module);
            } catch (SftpException ex) {
                log.error("上传失败！原因：创建文件夹异常",e);
                throw new SftpUploadException("上传失败！原因：创建文件夹异常");
            }
        }
        try {
            this.sftp.put(in,fileName);
        } catch (SftpException e) {
            log.error("上传失败！原因：上传异常",e);
            throw new SftpUploadException("上传失败！原因：上传异常");
        }

        super.disConnect();

    }

    @Override
    public File dowload(String module, String fileName,String tmpPath) throws SftpConnectException, SftpOperateException, SftpDowloadException {
        cdUpload();
        try {
            File file = new File(tmpPath + File.separator + fileName);
            FileOutputStream outputStream = new FileOutputStream(file);
            this.sftp.cd(module);
            this.sftp.get(fileName,outputStream);
            outputStream.close();
            return file;
        } catch (Exception e1) {
            throw new SftpDowloadException("下载文件异常！");
        }

    }

    public File dowload(String module, String fileName, String id, String tmpPath) throws SftpConnectException, SftpOperateException, SftpDowloadException {
        cdUpload();
        try {
            File file = new File(tmpPath + File.separator + fileName);
            FileOutputStream outputStream = new FileOutputStream(file);
            this.sftp.cd(module);
            this.sftp.get(id, outputStream);
            outputStream.close();
            return file;
        } catch (Exception e1) {
            throw new SftpDowloadException("下载文件异常！");
        }

    }
    private void cdUpload() throws SftpConnectException, SftpOperateException {
        try {
            super.connect(this.host,this.port,this.userName,this.password);
            this.sftp.cd("upload");
        } catch (JSchException e) {
            log.error("操作失败！原因：sftp 连接异常",e);
            throw new SftpConnectException("上传失败！原因：sftp 连接异常");
        } catch (SftpException e) {
            log.error("操作失败！原因：上传操作出现异常",e);
            throw new SftpOperateException("上传失败！原因：上传操作出现异常");
        }
    }
}