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;
    }
}