1、ftp
java实现ftp上传下载，可以借助apache的commons-net包来完成。
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;
import java.io.*;
import java.util.List;
import java.util.Map;
public class FtpUtils {
private static FTPClient ftpClient;
/**
* 获取ftpClient
* @param host 主机ip
* @param port 端口号
* @param username ftp用户名
* @param password ftp密码
* @return FTPClient对象
*/
private static FTPClient getFTPClient(String host,int port,String username,String password) {
ftpClient = new FTPClient();
try {
//连接ftp服务器
ftpClient.connect(host, port);
//登录ftp
ftpClient.login(username, password);
} catch (IOException e) {
LogUtil.error("连接ftp服务器异常！",e);
return ftpClient;
}
//设置编码方式
ftpClient.setControlEncoding("UTF-8");
try {
//设置文件类型，二进制文件
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
} catch (IOException e) {
LogUtil.error("设置文件类型异常！",e);
return ftpClient;
}
//设置被动模式（默认方式）
ftpClient.enterLocalPassiveMode();
if (!FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) {
//连接失败
try {
ftpClient.disconnect();
} catch (IOException e) {
LogUtil.error("关闭ftpClient异常！",e);
}
} else {
LogUtil.info("ftp连接成功！");
}
return ftpClient;
}
private static void free(){
try {
ftpClient.logout();
ftpClient.disconnect();
LogUtil.info("ftp断开连接！");
} catch (IOException e) {
LogUtil.error("ftpClient连接关闭异常",e);
}
}
/**
* ftp多文件上传
* @param host 主机ip
* @param port 主机端口号
* @param username ftp用户名
* @param password ftp密码
* @param remotePath 远程目录
* @param localPathList 本地文件路径集合,每个元素为带文件名的全路径
* @return 上传成功的文件个数
*/
public static int uploadMultipleFile(String host, int port, String username, String password, String remotePath, List<String> localPathList){
final int ZERO = 0;
int successNum = 0;
//连接ftp客户端
FTPClient ftpClient = getFTPClient(host, port, username, password);
//切换工作路径
try {
ftpClient.changeWorkingDirectory(remotePath);
} catch (IOException e) {
LogUtil.error("远程路径错误:"+remotePath,e);
return ZERO;
}
int reply = ftpClient.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
LogUtil.info("ftpClient未准备就绪，即将断开连接！");
free();
return ZERO;
}else{
//准备就绪，开始上传文件
ftpClient.enterLocalActiveMode();
String fileName = null;
for (String localPath : localPathList) {
try(InputStream in = new FileInputStream(localPath);) {
//去除路径，获取文件名
fileName = localPath.substring(localPath.lastIndexOf("/")+1, localPath.length());
//上传时文件名支持中文
fileName = new String(fileName.getBytes("GBK"), FTP.DEFAULT_CONTROL_ENCODING);
//上传文件
if (ftpClient.storeFile(fileName, in)) {
LogUtil.info("文件上传成功："+localPath);
successNum++;
}else{
LogUtil.info("文件上传失败："+localPath);
}
} catch (IOException e) {
LogUtil.error("文件上传失败："+localPath,e);
}
}
free();
}
return successNum;
}
/**
* 多文件下载
* @param host 主机ip
* @param port 端口号
* @param username sftp用户名
* @param password sftp密码
* @param srcToDstMap 每个元素的key为带文件名的远程全路径，value为带文件名的本地全路径
* @return 下载成功的个数
*/
public static int downloadMultipleFile(String host, int port, String username, String password, Map<String,String> srcToDstMap){
int successNum = 0;
final int ZERO = 0;
//连接ftp客户端
FTPClient ftpClient = getFTPClient(host, port, username, password);
int reply = ftpClient.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
LogUtil.info("ftpClient未准备就绪，即将断开连接！");
free();
return ZERO;
}else{
for (Map.Entry<String, String> entry : srcToDstMap.entrySet()) {
String src = entry.getKey();
String srcForLog = src;
try(OutputStream out = new FileOutputStream(entry.getValue())){
src = new String(src.getBytes("GBK"), FTP.DEFAULT_CONTROL_ENCODING);
if(ftpClient.retrieveFile(src, out)){
successNum++;
LogUtil.info("ftp下载成功："+srcForLog);
}else{
LogUtil.info("ftp下载失败："+srcForLog);
}
} catch (Exception e) {
LogUtil.error("ftp下载失败："+srcForLog, e);
}
}
free();
return successNum;
}
}
}
2、sftp
sftp是ssh ftp，java要想实现sftp上传下载，需借助第三方工具包jsch来完成。
import com.jcraft.jsch.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.nio.file.Paths;
import java.util.List;
import java.util.Properties;
public class SftpUtil {
private static final Logger LOGGER = LoggerFactory.getLogger(SftpUtil.class);
public static ChannelSftp getconnect(String host,int port,String username, String password) {
ChannelSftp sftp = null;
try {
JSch jsch = new JSch();
Session sshSession = jsch.getSession(username, host, port);
sshSession.setPassword(password);
Properties sshConfig = new Properties();
sshConfig.put("StrictHostKeyChecking", "no");
sshSession.setConfig(sshConfig);
sshSession.connect();
Channel channel = sshSession.openChannel("sftp");
channel.connect();
sftp = (ChannelSftp) channel;
LOGGER.info("sftp登录成功！");
} catch (Exception e) {
LOGGER.error("sftp登录失败！"+e.getMessage(),e);
}
return sftp;
}
public static void disconnect(ChannelSftp sftp) {
try {
if (sftp != null) {
Session session = sftp.getSession();
if(session.isConnected()){
session.disconnect();
}
}
} catch (JSchException e) {
LOGGER.error("关闭sftp会话异常:"+e.getMessage(),e);
}
}
public static int upload(ChannelSftp sftp,String host,int port,String username,String password,List<LocalRemoteInfo> localRemoteInfos){
int sucNum = 0;
if(null == sftp || !sftp.isConnected()){
LOGGER.info("sftp未连接！");
return sucNum;
}
try {
for (LocalRemoteInfo localRemoteInfo : localRemoteInfos) {
sftp.cd(localRemoteInfo.getRemotePath());
sftp.put(localRemoteInfo.getLocalPath(), Paths.get(localRemoteInfo.getLocalPath()).toFile().getName());
sucNum++;
}
}catch (SftpException e){
LOGGER.error("文件上传异常："+e.getMessage(),e);
}
return sucNum;
}
public static int download(ChannelSftp sftp,String host,int port,String username,String password,List<LocalRemoteInfo> localRemoteInfos){
int sucNum = 0;
if(null == sftp || !sftp.isConnected()){
LOGGER.info("sftp未连接！");
return sucNum;
}
try {
for (LocalRemoteInfo localRemoteInfo : localRemoteInfos) {
sftp.get(localRemoteInfo.getRemotePath(), localRemoteInfo.getLocalPath());
sucNum++;
}
} catch (SftpException e) {
LOGGER.error("文件下载异常："+e.getMessage(),e);
}
return sucNum;
}
public static class LocalRemoteInfo{
private String localPath;
private String remotePath;
public String getLocalPath() {
return localPath;
}
public void setLocalPath(String localPath) {
this.localPath = localPath;
}
public String getRemotePath() {
return remotePath;
}
public void setRemotePath(String remotePath) {
this.remotePath = remotePath;
}
}
}
