pom
- <dependency>
- <groupId>com.jcraft</groupId>
- <artifactId>jsch</artifactId>
- <version>0.1.55</version>
- </dependency>
复制代码 demo1:main方法直接下载
- package com.example.controller;
- import com.jcraft.jsch.*;
- import java.io.File;
- import java.io.InputStream;
- import java.io.OutputStream;
- public class JSchSFTPFileTransfer {
- public static void main(String[] args) {
- String host = "10.*.*.*";//服务器地址
- String user = "";//用户
- String password = "";//密码
- int port = 22;//端口
- String remoteFilePath = "/home/*/*/ps.xlsx";//拉取文件的路径
- String localFilePath = "C:\\Users\\*\\Downloads\\ps.xlsx";//下载到本地路径
- JSch jsch = new JSch();
- // 初始化对象
- Session session = null;
- ChannelSftp sftpChannel = null;
- InputStream inputStream = null;
- OutputStream outputStream = null;
- try {
- // 创建会话
- session = jsch.getSession(user, host, port);
- session.setConfig("StrictHostKeyChecking", "no");
- session.setPassword(password);
- session.connect();
- // 打开 SFTP 通道
- sftpChannel = (ChannelSftp) session.openChannel("sftp");
- sftpChannel.connect();
- //创建本地路径
- int lastSlashIndex = remoteFilePath.lastIndexOf("/");
- String path = remoteFilePath.substring(0, lastSlashIndex);
- File file = new File(path);
- if (!file.exists()) {
- try {
- file.mkdirs();
- } catch (Exception e) {
- System.out.println("=====jSchSFTPFileTransfer创建文件夹失败!====");
- }
- }
- // 下载文件
- inputStream = sftpChannel.get(remoteFilePath);
- // 上传文件到本地
- outputStream = new java.io.FileOutputStream(localFilePath);
- byte[] buffer = new byte[1024];
- int bytesRead;
- while ((bytesRead = inputStream.read(buffer)) != -1) {
- outputStream.write(buffer, 0, bytesRead);
- }
- System.out.println("=====jSchSFTPFileTransfer文件下载成功!===="+localFilePath);
- } catch (JSchException | SftpException | java.io.IOException e) {
- e.printStackTrace();
- } finally {
- // 关闭流、通道和会话
- if (inputStream != null) {
- try {
- inputStream.close();
- } catch (java.io.IOException e) {
- e.printStackTrace();
- }
- }
- if (outputStream != null) {
- try {
- outputStream.close();
- } catch (java.io.IOException e) {
- e.printStackTrace();
- }
- }
- if (sftpChannel != null && sftpChannel.isConnected()) {
- sftpChannel.disconnect();
- }
- if (session != null && session.isConnected()) {
- session.disconnect();
- }
- }
- }
- }
复制代码 demo2:页面按钮调接口下载
后端
- package com.example.controller;
- import com.example.common.utils.SFTPUtil;
- import com.jcraft.jsch.SftpException;
- import org.springframework.http.ResponseEntity;
- import org.springframework.http.HttpHeaders;
- import org.springframework.http.MediaType;
- import org.springframework.web.bind.annotation.GetMapping;
- import org.springframework.web.bind.annotation.RestController;
- @RestController
- public class testController {
- @GetMapping(value = "/export")
- public ResponseEntity<byte[]> empController(String remotePath) throws Exception {
- // remotePath = "/home/fr/zycpzb/ps.xlsx";
- String host = "10.1.16.92";
- int port = 22;
- String userName = "fr";
- String password = "Lnbi#0Fr";
- SFTPUtil sftp = new SFTPUtil(userName, password, host, port);
- sftp.login();
- try {
- byte[] buff = sftp.download(remotePath);
- HttpHeaders headers = new HttpHeaders();
- headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
- headers.setContentDispositionFormData("attachment", "ps.xlsx");
- return ResponseEntity.ok().headers(headers).body(buff);
- } catch (SftpException e) {
- e.printStackTrace();
- return ResponseEntity.status(500).body(null);
- }finally {
- sftp.logout();
- }
- }
- }
复制代码 SFTPUtil
- package com.example.common.utils;
- import java.io.File;
- import java.io.FileNotFoundException;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.*;
- import com.jcraft.jsch.*;
- import org.apache.commons.io.IOUtils;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- /**
- *
- * @ClassName: SFTPUtil
- * @Description: sftp连接工具类
- * @version 1.0.0
- */
- public class SFTPUtil {
- private transient Logger log = LoggerFactory.getLogger(this.getClass());
- private ChannelSftp sftp;
- private Session session;
- /**
- * FTP 登录用户名
- */
- private String username;
- /**
- * FTP 登录密码
- */
- private String password;
- /**
- * 私钥
- */
- private String privateKey;
- /**
- * FTP 服务器地址IP地址
- */
- private String host;
- /**
- * FTP 端口
- */
- private int port;
- /**
- * 构造基于密码认证的sftp对象
- *
- * @param username
- * @param password
- * @param host
- * @param port
- */
- public SFTPUtil(String username, String password, String host, int port) {
- this.username = username;
- this.password = password;
- this.host = host;
- this.port = port;
- }
- /**
- * 构造基于秘钥认证的sftp对象
- *
- * @param username
- * @param host
- * @param port
- * @param privateKey
- */
- public SFTPUtil(String username, String host, int port, String privateKey) {
- this.username = username;
- this.host = host;
- this.port = port;
- this.privateKey = privateKey;
- }
- public SFTPUtil() {
- }
- /**
- * 连接sftp服务器
- *
- * @throws Exception
- */
- public void login() {
- try {
- JSch jsch = new JSch();
- if (privateKey != null) {
- jsch.addIdentity(privateKey);// 设置私钥
- log.info("sftp connect,path of private key file:{}", privateKey);
- }
- log.info("sftp connect by host:{} username:{}", host, username);
- session = jsch.getSession(username, host, port);
- log.info("Session is build");
- if (password != null) {
- session.setPassword(password);
- }
- Properties config = new Properties();
- config.put("StrictHostKeyChecking", "no");
- session.setConfig(config);
- session.connect();
- log.info("Session is connected");
- Channel channel = session.openChannel("sftp");
- channel.connect();
- log.info("channel is connected");
- sftp = (ChannelSftp) channel;
- log.info(String.format("sftp server host:[%s] port:[%s] is connect successfull", host, port));
- } catch (JSchException e) {
- log.error("Cannot connect to specified sftp server : {}:{} \n Exception message is: {}", new Object[]{host, port, e.getMessage()});
- }
- }
- /**
- * 关闭连接 server
- */
- public void logout() {
- if (sftp != null) {
- if (sftp.isConnected()) {
- sftp.disconnect();
- log.info("sftp is closed already");
- }
- }
- if (session != null) {
- if (session.isConnected()) {
- session.disconnect();
- log.info("sshSession is closed already");
- }
- }
- }
- /**
- * 下载文件
- *
- * @param directory
- * 下载目录
- * @param downloadFile
- * 下载的文件
- * @param saveFile
- * 存在本地的路径
- * @throws SftpException
- * @throws FileNotFoundException
- * @throws Exception
- */
- public void download(String directory, String downloadFile, String saveFile) throws SftpException, FileNotFoundException{
- if (directory != null && !"".equals(directory)) {
- sftp.cd(directory);
- }
- File file = new File(saveFile);
- sftp.get(downloadFile, new FileOutputStream(file));
- log.info("file:{} is download successful" , downloadFile);
- }
- /**
- * 下载文件
- * @param directory 下载目录
- * @param downloadFile 下载的文件名
- * @return 字节数组
- * @throws SftpException
- * @throws IOException
- * @throws Exception
- */
- public byte[] download(String directory, String downloadFile) throws SftpException, IOException{
- if (directory != null && !"".equals(directory)) {
- sftp.cd(directory);
- }
- InputStream is = sftp.get(downloadFile);
- byte[] fileData = IOUtils.toByteArray(is);
- log.info("file:{} is download successful" , downloadFile);
- return fileData;
- }
- /**
- * 下载文件
- * @param directory 下载的文件名
- * @return 字节数组
- * @throws SftpException
- * @throws IOException
- * @throws Exception
- */
- public byte[] download(String directory) throws SftpException, IOException{
- InputStream is = sftp.get(directory);
- byte[] fileData = IOUtils.toByteArray(is);
- log.info("file:{} is download successful" , directory);
- is.close();
- return fileData;
- }
- }
复制代码 前端jQuery
- function downloadFile(filePath) {
- $.ajax({
- url: '/download',
- type: 'GET',
- data: { filePath: filePath },
- xhrFields: {
- responseType: 'blob' // Important to handle binary data
- },
- success: function(data, status, xhr) {
- // Create a download link for the blob data
- var blob = new Blob([data], { type: xhr.getResponseHeader('Content-Type') });
- var link = document.createElement('a');
- link.href = window.URL.createObjectURL(blob);
- link.download = 'filename.ext'; // You can set the default file name here
- document.body.appendChild(link);
- link.click();
- document.body.removeChild(link);
- },
- error: function(xhr, status, error) {
- console.error('File download failed:', status, error);
- }
- });
- }
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