添加依赖Jsch-0.1.54.jar
<!-- https://mvnrepository.com/artifact/com.jcraft/jsch -->
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version></version>
</dependency>
FTP上传下载文件例子
import sun.net.ftp.FtpClient;
import sun.net.ftp.FtpProtocolException;
import java.io.*;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
/**
* Java自带的API对FTP的操作
*/
public class Test {
private FtpClient ftpClient;
Test(){
/*
使用默认的端口号、用户名、密码以及根目录连接FTP服务器
*/
, ", "/home/jiashubing/ftp/anonymous/");
}
public void connectServer(String ip, int port, String user, String password, String path) {
try {
/* ******连接服务器的两种方法*******/
ftpClient = FtpClient.create();
try {
SocketAddress addr = new InetSocketAddress(ip, port);
ftpClient.connect(addr);
ftpClient.login(user, password.toCharArray());
System.out.println("login success!");
) {
//把远程系统上的目录切换到参数path所指定的目录
ftpClient.changeDirectory(path);
}
} catch (FtpProtocolException e) {
e.printStackTrace();
}
} catch (IOException ex) {
ex.printStackTrace();
throw new RuntimeException(ex);
}
}
/**
* 关闭连接
*/
public void closeConnect() {
try {
ftpClient.close();
System.out.println("disconnect success");
} catch (IOException ex) {
System.out.println("not disconnect");
ex.printStackTrace();
throw new RuntimeException(ex);
}
}
/**
* 上传文件
* @param localFile 本地文件
* @param remoteFile 远程文件
*/
public void upload(String localFile, String remoteFile) {
File file_in = new File(localFile);
try(OutputStream os = ftpClient.putFileStream(remoteFile);
FileInputStream is = new FileInputStream(file_in)) {
];
int c;
) {
os.write(bytes, , c);
}
System.out.println("upload success");
} catch (IOException ex) {
System.out.println("not upload");
ex.printStackTrace();
} catch (FtpProtocolException e) {
e.printStackTrace();
}
}
/**
* 下载文件。获取远程机器上的文件filename，借助TelnetInputStream把该文件传送到本地。
* @param remoteFile 远程文件路径(服务器端)
* @param localFile 本地文件路径(客户端)
*/
public void download(String remoteFile, String localFile) {
File file_in = new File(localFile);
try(InputStream is = ftpClient.getFileStream(remoteFile);
FileOutputStream os = new FileOutputStream(file_in)){
];
int c;
) {
os.write(bytes, , c);
}
System.out.println("download success");
} catch (IOException ex) {
System.out.println("not download");
ex.printStackTrace();
}catch (FtpProtocolException e) {
e.printStackTrace();
}
}
public static void main(String agrs[]) {
Test fu = new Test();
//下载测试
String filepath[] = {"aa.xlsx","bb.xlsx"};
String localfilepath[] = {"E:/lalala/aa.xlsx","E:/lalala/bb.xlsx"};
; i < filepath.length; i++) {
fu.download(filepath[i], localfilepath[i]);
}
//上传测试
String localfile = "E:/lalala/tt.xlsx";
String remotefile = "tt.xlsx"; //上传
fu.upload(localfile, remotefile);
fu.closeConnect();
}
}
SFTP上传下载文件例子
package com;
import com.jcraft.jsch.*;
import java.util.Properties;
/**
* 解释一下SFTP的整个调用过程，这个过程就是通过Ip、Port、Username、Password获取一个Session,
* 然后通过Session打开SFTP通道（获得SFTP Channel对象）,再在建立通道（Channel）连接，最后我们就是
* 通过这个Channel对象来调用SFTP的各种操作方法.总是要记得，我们操作完SFTP需要手动断开Channel连接与Session连接。
* @author jiashubing
* @since 2018/5/8
*/
public class SftpCustom {
private ChannelSftp channel;
private Session session;
private String sftpPath;
SftpCustom() {
/*
使用端口号、用户名、密码以连接SFTP服务器
*/
, ", "/home/ftp/");
}
SftpCustom(String ftpHost, int ftpPort, String ftpUserName, String ftpPassword, String sftpPath) {
this.connectServer(ftpHost, ftpPort, ftpUserName, ftpPassword, sftpPath);
}
public void connectServer(String ftpHost, int ftpPort, String ftpUserName, String ftpPassword, String sftpPath) {
try {
this.sftpPath = sftpPath;
// 创建JSch对象
JSch jsch = new JSch();
// 根据用户名，主机ip，端口获取一个Session对象
session = jsch.getSession(ftpUserName, ftpHost, ftpPort);
if (ftpPassword != null) {
// 设置密码
session.setPassword(ftpPassword);
}
Properties configTemp = new Properties();
configTemp.put("StrictHostKeyChecking", "no");
// 为Session对象设置properties
session.setConfig(configTemp);
// 设置timeout时间
session.setTimeout();
session.connect();
// 通过Session建立链接
// 打开SFTP通道
channel = (ChannelSftp) session.openChannel("sftp");
// 建立SFTP通道的连接
channel.connect();
} catch (JSchException e) {
//throw new RuntimeException(e);
}
}
/**
* 断开SFTP Channel、Session连接
*/
public void closeChannel() {
try {
if (channel != null) {
channel.disconnect();
}
if (session != null) {
session.disconnect();
}
} catch (Exception e) {
//
}
}
/**
* 上传文件
*
* @param localFile 本地文件
* @param remoteFile 远程文件
*/
public void upload(String localFile, String remoteFile) {
try {
remoteFile = sftpPath + remoteFile;
channel.put(localFile, remoteFile, ChannelSftp.OVERWRITE);
channel.quit();
} catch (SftpException e) {
e.printStackTrace();
}
}
/**
* 下载文件
*
* @param remoteFile 远程文件
* @param localFile 本地文件
*/
public void download(String remoteFile, String localFile) {
try {
remoteFile = sftpPath + remoteFile;
channel.get(remoteFile, localFile);
channel.quit();
} catch (SftpException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
SftpCustom sftpCustom = new SftpCustom();
//上传测试
String localfile = "E:/logs/catalina.out";
String remotefile = "catalina.out";
sftpCustom.upload(localfile, remotefile);
//下载测试
// sftpCustom.download(remotefile, "E:/lalala/catalina.out");
// sftpCustom.closeChannel();
}
}