Java FTP上传/下载文件
package com.maosheng.util.schedule;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.io.IOUtils;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class FTPUtil {
final static Logger logger = LoggerFactory.getLogger(FTPUtil.class);
private static int timeout = 1000*60*2;
/**
* Description: 向FTP服务器上传文件
* @param url FTP服务器hostname
* @param port FTP服务器端口
* @param username FTP登录账号
* @param password FTP登录密码
* @param path FTP服务器保存目录
* @param filename 上传到FTP服务器上的文件名
* @param input 输入流
* @return 成功返回true，否则返回false
*/
public static boolean uploadFile(String url, int port, String username, String password, String path, String filename, InputStream input) {
boolean success = false;
FTPClient ftp = new FTPClient();
try {
boolean login = loginFTP(ftp, url, port, username, password);
if(!login) {
logger.info("登录失败！url:{},port:{},username:{}",new Object[]{url,port,username});
return success;
}
boolean fhangeDir = false;
for(int i = 0; i < 3; i++) {
// 设置上传目录
fhangeDir = ftp.changeWorkingDirectory(path);
if(!fhangeDir){
logger.info("ftp工作路径{}切换失败，进行第{}次重新切换",new Object[]{path, i + 1});
}else {
break;
}
}
if(!fhangeDir) {
logger.info("ftp工作路径{}重新切换失败",new Object[]{path});
return success;
}
//设置缓存大小
ftp.setBufferSize(1024);
//设置编码格式
ftp.setControlEncoding("GBK");
// 设置文件类型
ftp.setFileType(FTPClient.ASCII_FILE_TYPE);
boolean upload = ftp.storeFile(filename, input);
if(!upload) {
logger.info("文件{}上传失败", filename);
return success;
}
logger.info("文件{}上传成功", filename);
input.close();
boolean logout = ftp.logout();
if(!logout){
logger.info("退出登录失败url:{},port:{},username:{}",new Object[]{url,port,username});
}
success = true;
} catch (IOException e) {
logger.info("文件上传{}出错url:{},port:{},username:{}",new Object[]{filename,url,port,username});
} finally {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException ioe) {
logger.info("关闭FTPClient：{}连接出错", new Object[]{ftp} , ioe);
}
}
}
return success;
}
/**
* Description: 从FTP服务器下载文件
* @param url FTP服务器hostname
* @param port FTP服务器端口
* @param username FTP登录账号
* @param password FTP登录密码
* @param remotePath FTP服务器上的相对路径
* @param localPath 下载后保存到本地的路径
* @return 下载的文件列表
*/
public static List<String> downFile(String url, int port, String username, String password,String remotePath, String localPath) {
List<String> files = new ArrayList<String>();
FTPClient ftp = new FTPClient();
try {
boolean login = loginFTP(ftp, url, port, username, password);
if(!login) {
logger.info("登录失败！url:{},port:{},username:{}",new Object[]{url,port,username});
return files;
}
boolean fhangeDir = false;
for(int i = 0; i < 3; i++) {
fhangeDir = ftp.changeWorkingDirectory(remotePath);
if(!fhangeDir){
logger.info("ftp工作路径{}切换失败，进行第{}次重新切换",new Object[]{remotePath, i + 1});
}else {
break;
}
}
if(!fhangeDir) {
logger.info("ftp工作路径{}重新切换失败",new Object[]{remotePath});
return files;
}
FTPFile[] fs = ftp.listFiles();
if(fs == null || fs.length == 0){
logger.info("ftp路径{}无可下载划文件",new Object[]{remotePath});
return files;
}
for (FTPFile ff : fs) {
if(ff.isFile()){
File localFile = new File(localPath + "\\" + ff.getName());
OutputStream is = new FileOutputStream(localFile);
boolean flag = ftp.retrieveFile(ff.getName(), is);
if(!flag){
logger.info("从ftp路径{}读取文件{}出错",new Object[]{remotePath, ff.getName()});
}else {
files.add(localPath + "\\" + ff.getName());
}
IOUtils.closeQuietly(is);
}
}
boolean logout = ftp.logout();
if(!logout){
logger.info("退出登录失败url:{},port:{},username:{}",new Object[]{url,port,username});
}
} catch (IOException e) {
logger.info("文件下载出错url:{},port:{},username:{}",new Object[]{url,port,username});
} finally {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException ioe) {
logger.info("关闭FTPClient：{}连接出错", new Object[]{ftp} , ioe);
}
}
}
return files;
}
/**
* Description: 登录到FTP服务器的某个目录删除文件
* @param url FTP服务器hostname
* @param port FTP服务器端口
* @param username FTP登录账号
* @param password FTP登录密码
* @param remotePath FTP服务器上的相对路径
* @param filenName 文件名称
* @return 成功返回true，否则返回false
*/
public static boolean deleteFile(String url, int port, String username, String password,String remotePath, String filenName) {
boolean success = false;
FTPClient ftp = new FTPClient();
try {
boolean login = loginFTP(ftp, url, port, username, password);
if(!login) {
logger.info("登录失败！url:{},port:{},username:{}",new Object[]{url,port,username});
return success;
}
boolean fhangeDir = false;
for(int i = 0; i < 3; i++) {
fhangeDir = ftp.changeWorkingDirectory(remotePath);
if(!fhangeDir){
logger.info("ftp工作路径{}切换失败，进行第{}次重新切换",new Object[]{remotePath, i + 1});
}else {
break;
}
}
if(!fhangeDir) {
logger.info("ftp工作路径{}重新切换失败",new Object[]{remotePath});
return success;
}
FTPFile[] fs = ftp.listFiles();
if(fs == null || fs.length == 0){
logger.info("ftp路径{}无可删除的文件",new Object[]{remotePath});
return success;
}
for(FTPFile ff : fs) {
if(ff.isFile()&&filenName.equals(ff.getName())){
boolean flag = ftp.deleteFile(ff.getName());
if(!flag) {
logger.info("删除ftp服务器{}目录下的文件：{}失败",new Object[]{remotePath,ff.getName()});
}else{
logger.info("删除ftp服务器{}目录下的文件：{}成功",new Object[]{remotePath,ff.getName()});
}
}
}
boolean logout = ftp.logout();
if(!logout){
logger.info("退出登录失败url:{},port:{},username:{}",new Object[]{url,port,username});
}
success=true;
} catch (IOException e) {
logger.info("删除ftp文件出错url:{},port:{},username:{}",new Object[]{url,port,username});
} finally {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException ioe) {
logger.info("关闭FTPClient：{}连接出错", new Object[]{ftp} , ioe);
}
}
}
return success;
}
/**
* Description: 登录FTP服务器
* @param ftp FTPClient
* @param url FTP服务器hostname
* @param port FTP服务器端口
* @param username FTP登录账号
* @param password FTP登录密码
* @return 成功返回true，否则返回false
*/
private static boolean loginFTP(FTPClient ftp,String url, int port, String username, String password){
boolean success = false;
try {
int reply;
//连接FTP服务器
ftp.connect(url, port);
//设置超时
ftp.setSoTimeout(timeout);
//登录
ftp.login(username, password);
//检测连接是否成功
reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect();
success=false;
}else
{
success=true;
}
ftp.setControlEncoding("GBK");
FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
conf.setServerLanguageCode("zh");
} catch (SocketException e) {
logger.error("连接到FTP服务器出错，url:{},port:{},username:{}",new Object[]{url,port,username},e);
} catch (IOException e) {
logger.error("连接到FTP服务器出错，url:{},port:{},username:{}",new Object[]{url,port,username},e);
}
return success;
}
}
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