apache ftpclient example

<!-- ftp 연동  maven setting-->

<dependency>

<groupId>commons-net</groupId>

<artifactId>commons-net</artifactId>

<version>3.3</version>

</dependency>

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import org.apache.commons.net.ftp.FTP;

import org.apache.commons.net.ftp.FTPClient;

import org.apache.commons.net.ftp.FTPClientConfig;

import org.apache.commons.net.ftp.FTPFile;

import org.apache.commons.net.ftp.FTPReply;

public class FTPUtility {

private String server = "";

private int port = 0;

private String id = "";

private String password = "";

FTPClient ftpClient;

//FTPClientConfig conf;

public FTPUtility(String server, int port, String id, String password) throws IOException {

this.server = server;

this.port = port;

this.id = id;

this.password = password;

ftpClient = new FTPClient();

ftpClient.setControlEncoding("euc-kr");

//ftpClient.setFileType(FTP.ASCII_FILE_TYPE);

// conf = new FTPClientConfig(FTPClientConfig.SYST_MVS);

// ftpClient.configure(conf);

}

//로그인

public boolean login(){

try{

if(ftpClient.isConnected() == true){

return ftpClient.login(id, password);

}

}catch(Exception e){

e.printStackTrace();

}

return false;

}

//연결

public void connect(){

try{

ftpClient.connect(server, port);

int reply = 0;

//연결 시도후, 성공했는지 응답코드 확인

reply = ftpClient.getReplyCode();

if(FTPReply.isPositiveCompletion(reply) == false){

ftpClient.disconnect();

System.out.println("서버로부터 연결을 거부당했습니다.");

}

 //현재 데이터 접속 방식 설정 PASSIVE_LOCAL_DATA_CONNECTION_MODE .

ftpClient.enterLocalPassiveMode();//이코드가 없어서 로컬로 돌렸을때 파일 디렉토리를 못받아왔다 넣어주자 2시간 소모했다....

}catch(Exception e){

if(ftpClient.isConnected() == true){

try{

ftpClient.disconnect();

}catch(IOException f){

}

}

e.printStackTrace();

}

}

//서버로부터 로그아웃

public boolean logout(){

try{

return ftpClient.logout();

}catch(Exception e){

e.printStackTrace();

}

return false;

}

//ftp의 ls 명령 , 모든파일 리스트를 가져온다

public FTPFile[] list(){

FTPFile[] files = null;

try{

files = ftpClient.listFiles();

return files;

}catch(Exception e){

e.printStackTrace();

}

return null;

}

//파일전송을 받는다

public File get(String source, String target){

OutputStream output = null;

try{

File local = new File(source);

output = new FileOutputStream(local);

}catch(Exception e){

e.printStackTrace();

}

File file = new File(source);

try{

ftpClient.setFileType(FTP.BINARY_FILE_TYPE); //이 코드는 반드시 서버와 커넥션이후에 써야된다

boolean flag = ftpClient.retrieveFile(target, output);

output.flush();

output.close();

if(flag == true){

return file;

}

}catch(Exception e){

e.printStackTrace();

}

return null;

}

//파일 업로드

public boolean upload(File file){

boolean resultCode = false;

try{

ftpClient.setFileType(FTP.BINARY_FILE_TYPE); //이 코드는 반드시 서버와 커넥션이후에 써야된다

FileInputStream fis = new FileInputStream(file);

            boolean isSuccess = ftpClient.storeFile(file.getName(), fis);

            if(isSuccess == true){

            resultCode = true;

            }

            fis.close();

}catch(Exception e){

e.printStackTrace();

}

return resultCode;

}

//서버 디렉토리 이동

public void cd(String path){

try{

ftpClient.changeWorkingDirectory(path);

}catch(Exception e){

e.printStackTrace();

}

}

//서버로 부터 연결을 닫는다

public void disconnect(){

try{

ftpClient.disconnect();

}catch(Exception e){

e.printStackTrace();

}

}

}