ftp上传工具类

2018-08-17 10:08:00
admin
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726
摘要:ftp上传工具类
ftp上传工具类中,我的业务有点复杂,先读取文件进行解析,将解析的某个字段取出来,以这个字段命名文件,把文件复制到服务器,同时把服务器上的文件删除,在进行读取之后,在下载文件的时候出错,需要重新再连接一下ftp就可以下载了
package io.sbed.common.utils;

import com.alibaba.fastjson.JSONObject;
import io.sbed.modules.api.utils.XmlUtil;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;

import java.io.*;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
 * @Author:liujiawan
 * @Date:Created in 2018-08-15 上午 10:01
 * @Description
 * @Modified By:
 */
public class FtpUtils {
    /**
     * 字符编码
     */
    private static final String DEFAULT_CHARSET = "UTF-8";
    /**
     * 默认超时间
     */
    private static final int DEFAULT_TIMEOUT = 120 * 1000;
    /**
     * 默认上传目录
     */
    private static final String DAILY_FILE_PATH = "aole";
    /**
     * ftp地址
     */
    private final String host;
    /**
     * 端口号
     */
    private final int port;
    /**
     * 用户名
     */
    private final String username;
    /**
     * 密码
     */
    private final String password;
    private static  FTPClient ftpClient;
    private volatile String ftpBasePath;

    private static final String OUT_PATH="/4200.IMPBA.SWBEBTRADE.REPORT/out/";

    private static final String LOCALPATH="d:"+FileUtils.getStaticPath();

    private FtpUtils(String host, String username, String password) {
        this(host, 3321, username, password, DEFAULT_CHARSET);
        setTimeout(DEFAULT_TIMEOUT, DEFAULT_TIMEOUT, DEFAULT_TIMEOUT);
    }
    private FtpUtils(String host, int port, String username, String password, String charset) {
        ftpClient = new FTPClient();
        ftpClient.setControlEncoding(charset);
        this.host = StringUtils.isEmpty(host) ? "localhost" : host;
        this.port = (port <= 0) ? 21 : port;
        this.username = StringUtils.isEmpty(username) ? "anonymous" : username;
        this.password = password;
    }
    /**
     * <p>Description:[创建默认的ftp客户端]</p>
     * @param host     主机名或者ip地址
     * @param username ftp用户名
     * @param password ftp密码
     */
    public static FtpUtils createFtpClient(String host, String username, String password) {
        return new FtpUtils(host, username, password);
    }
    /**
     * <p>Description:[创建自定义属性的ftp客户端]</p>
     * @param host     主机名或者ip地址
     * @param port     ftp端口
     * @param username ftp用户名
     * @param password ftp密码
     * @param charset  字符集
     */
    public static FtpUtils createFtpClient(String host, int port, String username, String password, String charset) {
        return new FtpUtils(host, port, username, password, charset);
    }

    /**
     * <p>Description:[设置超时时间]</p>
     * @param defaultTimeout 超时时间
     * @param connectTimeout 超时时间
     * @param dataTimeout    超时时间
     */
    public void setTimeout(int defaultTimeout, int connectTimeout, int dataTimeout) {
        ftpClient.setDefaultTimeout(defaultTimeout);
        ftpClient.setConnectTimeout(connectTimeout);
        ftpClient.setDataTimeout(dataTimeout);
    }
    public void connect() throws IOException {
        try {
            ftpClient.connect(host, port);
        } catch (UnknownHostException e) {
            throw new IOException("Can't find FTP server :" + host);
        }
        int reply = ftpClient.getReplyCode();
        if (!FTPReply.isPositiveCompletion(reply)) {
            disconnect();
            throw new IOException("Can't connect to server :" + host);
        }
        if (!ftpClient.login(username, password)) {
            disconnect();
            throw new IOException("Can't login to server :" + host);
        }
        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
        ftpClient.enterLocalPassiveMode();
        initFtpBasePath();
    }

    /**
     * <p>Description:[连接ftp时保存刚登陆ftp时的路径]</p>
     */
    private void initFtpBasePath() throws IOException {
        if (StringUtils.isEmpty(ftpBasePath)) {
            synchronized (this) {
                if (StringUtils.isEmpty(ftpBasePath)) {
                    ftpBasePath = ftpClient.printWorkingDirectory();
                }
            }
        }
    }

    /**
     * <p>Description:[ftp是否处于连接状态,是连接状态返回<tt>true</tt>]</p>
     * Created on 2018/6/5
     *
     * @return boolean  是连接状态返回<tt>true</tt>
     * @author 叶向阳
     */
    public boolean isConnected() {
        return ftpClient.isConnected();
    }

    /**
     * <p>Description:[上传文件到对应日期文件下,
     * 如当前时间是2018-06-06,则上传到[ftpBasePath]/[DAILY_FILE_PATH]/2018/06/06/下]</p>
     * @param fileName    文件名
     * @param inputStream 文件输入流
     * @return java.lang.String
     */
    public String uploadFileToDailyDir(String fileName, InputStream inputStream) throws IOException {
        changeWorkingDirectory(ftpBasePath);
        SimpleDateFormat dateFormat = new SimpleDateFormat("/yyyy/MM/dd");
        String formatDatePath = dateFormat.format(new Date());
        String uploadDir = DAILY_FILE_PATH + formatDatePath;
        makeDirs(uploadDir);
        storeFile(fileName, inputStream);
        return formatDatePath + "/" + fileName;
    }

    /**
     * <p>Description:[根据uploadFileToDailyDir返回的路径,从ftp下载文件到指定输出流中]</p>
     * @param dailyDirFilePath 方法uploadFileToDailyDir返回的路径
     * @param outputStream     输出流
     * @author 叶向阳
     */
    public void downloadFileFromDailyDir(String dailyDirFilePath, OutputStream outputStream) throws IOException {
        changeWorkingDirectory(ftpBasePath);
        String ftpRealFilePath = DAILY_FILE_PATH + dailyDirFilePath;
        ftpClient.retrieveFile(ftpRealFilePath, outputStream);
    }

    /**
     * <p>Description:[获取ftp上指定文件名到输出流中]</p>
     * Created on 2018/6/5
     *
     * @param ftpFileName 文件在ftp上的路径  如绝对路径 /home/ftpuser/123.txt 或者相对路径 123.txt
     * @param out         输出流
     * @author 叶向阳
     */
    public void retrieveFile(String ftpFileName, OutputStream out) throws IOException {
        try {
            FTPFile[] fileInfoArray = ftpClient.listFiles(ftpFileName);
            if (fileInfoArray == null || fileInfoArray.length == 0) {
                throw new FileNotFoundException("File '" + ftpFileName + "' was not found on FTP server.");
            }

            FTPFile fileInfo = fileInfoArray[0];
            if (fileInfo.getSize() > Integer.MAX_VALUE) {
                throw new IOException("File '" + ftpFileName + "' is too large.");
            }

            if (!ftpClient.retrieveFile(ftpFileName, out)) {
                throw new IOException("Error loading file '" + ftpFileName + "' from FTP server. Check FTP permissions and path.");
            }
            out.flush();
        } finally {
            closeStream(out);
        }
    }


    /**
     * <p>Description:[将输入流存储到指定的ftp路径下]</p>
     * Created on 2018/6/6
     *
     * @param ftpFileName 文件在ftp上的路径 如绝对路径 /home/ftpuser/123.txt 或者相对路径 123.txt
     * @param in          输入流
     * @author 叶向阳
     */
    public void storeFile(String ftpFileName, InputStream in) throws IOException {
        try {
            if (!ftpClient.storeFile(ftpFileName, in)) {
                throw new IOException("Can't upload file '" + ftpFileName + "' to FTP server. Check FTP permissions and path.");
            }
        } finally {
            closeStream(in);
        }
    }

    /**
     * <p>Description:[根据文件ftp路径名称删除文件]</p>
     * Created on 2018/6/6
     *
     * @param ftpFileName 文件ftp路径名称
     * @author 叶向阳
     */
    public static void deleteFile(String ftpFileName) throws IOException {
        if (!ftpClient.deleteFile(ftpFileName)) {
            throw new IOException("Can't remove file '" + ftpFileName + "' from FTP server.");
        }
    }

    /**
     * <p>Description:[上传文件到ftp]</p>
     * Created on 2018/6/6
     *
     * @param ftpFileName 上传到ftp文件路径名称
     * @param localFile   本地文件路径名称
     * @author 叶向阳
     */
    public void upload(String ftpFileName, File localFile) throws IOException {
        if (!localFile.exists()) {
            throw new IOException("Can't upload '" + localFile.getAbsolutePath() + "'. This file doesn't exist.");
        }
        InputStream in = null;
        try {
            in = new BufferedInputStream(new FileInputStream(localFile));
            if (!ftpClient.storeFile(ftpFileName, in)) {
                throw new IOException("Can't upload file '" + ftpFileName + "' to FTP server. Check FTP permissions and path.");
            }
        } finally {
            closeStream(in);
        }
    }

    /**
     * <p>Description:[上传文件夹到ftp上]</p>
     * @param remotePath ftp上文件夹路径名称
     * @param localPath  本地上传的文件夹路径名称
     */
    public void uploadDir(String remotePath, String localPath) throws IOException {
        localPath = localPath.replace("\\\\", "/");
        File file = new File(localPath);
        if (file.exists()) {
            if (!ftpClient.changeWorkingDirectory(remotePath)) {
                ftpClient.makeDirectory(remotePath);
                ftpClient.changeWorkingDirectory(remotePath);
            }
            File[] files = file.listFiles();
            if (null != files) {
                for (File f : files) {
                    if (f.isDirectory() && !".".equals(f.getName()) && !"..".equals(f.getName())) {
                        uploadDir(remotePath + "/" + f.getName(), f.getPath());
                    } else if (f.isFile()) {
                        upload(remotePath + "/" + f.getName(), f);
                    }
                }
            }
        }
    }

    /**
     * <p>Description:[下载ftp文件到本地上]</p>
     * Created on 2018/6/6
     *
     * @param ftpFileName ftp文件路径名称
     * @param localFile   本地文件路径名称
     * @author 叶向阳
     */
    public static void download(String ftpFileName, File localFile) throws IOException {
        OutputStream out = null;
        try {
            FTPFile[] fileInfoArray = ftpClient.listFiles(ftpFileName);
            if (fileInfoArray == null || fileInfoArray.length == 0) {
                throw new FileNotFoundException("File " + ftpFileName + " was not found on FTP server.");
            }

            FTPFile fileInfo = fileInfoArray[0];
            if (fileInfo.getSize() > Integer.MAX_VALUE) {
                throw new IOException("File " + ftpFileName + " is too large.");
            }

            out = new BufferedOutputStream(new FileOutputStream(localFile));
            if (!ftpClient.retrieveFile(ftpFileName, out)) {
                throw new IOException("Error loading file " + ftpFileName + " from FTP server. Check FTP permissions and path.");
            }
            out.flush();
        } finally {
            closeStream(out);
        }
    }
    /**
     * <p>Description:[改变工作目录]</p>
     * Created on 2018/6/6
     *
     * @param dir ftp服务器上目录
     * @return boolean 改变成功返回true
     * @author 叶向阳
     */
    public boolean changeWorkingDirectory(String dir) {
        if (!ftpClient.isConnected()) {
            return false;
        }
        try {
            return ftpClient.changeWorkingDirectory(dir);
        } catch (IOException e) {
        }

        return false;
    }

    /**
     * <p>Description:[下载ftp服务器下文件夹到本地]</p>
     * @param remotePath ftp上文件夹路径名称
     * @param localPath  本地上传的文件夹路径名称
     * @return void
     */
    public static  void downloadDir(String remotePath, String localPath) throws IOException {
        localPath = localPath.replace("\\\\", "/");
        File file = new File(localPath);
        if (!file.exists()) {
            file.mkdirs();
        }
        FTPFile[] ftpFiles = ftpClient.listFiles(remotePath);
        for (int i = 0; ftpFiles != null && i < ftpFiles.length; i++) {
            FTPFile ftpFile = ftpFiles[i];
            if (ftpFile.isDirectory() && !".".equals(ftpFile.getName()) && !"..".equals(ftpFile.getName())) {
                downloadDir(remotePath + "/" + ftpFile.getName(), localPath + "/" + ftpFile.getName());
            } else {
                download(remotePath + "/" + ftpFile.getName(), new File(localPath + "/" + ftpFile.getName()));
            }
        }
    }


    /**
     * <p>Description:[列出ftp上文件目录下的文件]</p>
     * @param filePath ftp上文件目录
     * @return java.util.List<java.lang.String>
     */
    public List<String> listFileNames(String filePath) throws IOException {
        FTPFile[] ftpFiles = ftpClient.listFiles(filePath);
        List<String> fileList = new ArrayList<>();
        if (ftpFiles != null) {
            for (int i = 0; i < ftpFiles.length; i++) {
                FTPFile ftpFile = ftpFiles[i];
                if (ftpFile.isFile()) {
                    fileList.add(ftpFile.getName());
                }
            }
        }

        return fileList;
    }

    /**
     * <p>Description:[发送ftp命令到ftp服务器中]</p>
     * Created on 2018/6/6
     *
     * @param args ftp命令
     */
    public void sendSiteCommand(String args) throws IOException {
        if (!ftpClient.isConnected()) {
            ftpClient.sendSiteCommand(args);
        }
    }
    /**
     * <p>Description:[获取当前所处的工作目录]</p>
     * @return java.lang.String 当前所处的工作目录
     */
    public String printWorkingDirectory() {
        if (!ftpClient.isConnected()) {
            return "";
        }
        try {
            return ftpClient.printWorkingDirectory();
        } catch (IOException e) {
            // do nothing
        }
        return "";
    }

    /**
     * <p>Description:[切换到当前工作目录的父目录下]</p>
     * @return boolean 切换成功返回true
     */
    public boolean changeToParentDirectory() {

        if (!ftpClient.isConnected()) {
            return false;
        }

        try {
            return ftpClient.changeToParentDirectory();
        } catch (IOException e) {
            // do nothing
        }

        return false;
    }

    /**
     * <p>Description:[返回当前工作目录的上一级目录]</p>
     * @return java.lang.String 当前工作目录的父目录
     */
    public String printParentDirectory() {
        if (!ftpClient.isConnected()) {
            return "";
        }
        String w = printWorkingDirectory();
        changeToParentDirectory();
        String p = printWorkingDirectory();
        changeWorkingDirectory(w);
        return p;
    }

    /**
     * <p>Description:[创建目录]</p>
     * @param pathname 路径名
     * @return boolean 创建成功返回true
     */
    public boolean makeDirectory(String pathname) throws IOException {
        return ftpClient.makeDirectory(pathname);
    }
    /**
     * <p>Description:[创建多个目录]</p>
     * @param pathname 路径名
     */
    public void makeDirs(String pathname) throws IOException {
        pathname = pathname.replace("\\\\", "/");
        String[] pathnameArray = pathname.split("/");
        for (String each : pathnameArray) {
            if (StringUtils.isNotEmpty(each)) {
                ftpClient.makeDirectory(each);
                ftpClient.changeWorkingDirectory(each);
            }
        }
    }

    /**
     * <p>Description:[关闭流]</p>
     * Created on 2018/6/6
     * @param stream 流
     */
    private static void closeStream(Closeable stream) {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException ex) {
                // do nothing
            }
        }
    }

    /**
     * <p>Description:[关闭ftp连接]</p>
     */
    public void disconnect() {
        if (null != ftpClient && ftpClient.isConnected()) {
            try {
                ftpClient.logout();
                ftpClient.disconnect();
            } catch (IOException ex) {
                // do nothing
            }
        }
    }

    public static void main(String[] args) throws IOException {
        FtpUtils ftpCli = FtpUtils.createFtpClient("", "nstest01", "nstest01");
        ftpCli.connect();
        File file = new File("D:\\a.xml");
        ftpCli.upload("a.xml", file);
    }
    public static void readFtpDir() throws Exception {
        FtpUtils ftpCli = FtpUtils.createFtpClient("", "nstest01", "nstest01");
        ftpCli.connect();
        FTPFile[] ftpFiles = ftpClient.listFiles(OUT_PATH);
        JSONObject jsonObject=null;
        for (int i = 0; ftpFiles != null && i < ftpFiles.length; i++) {
            FTPFile ftpFile = ftpFiles[i];
            if (!ftpFile.isDirectory()){
                String temp=readXmlToString(OUT_PATH+ftpFile.getName(),ftpClient);
                jsonObject= XmlUtil.xmltoJson(temp);
                jsonObject= (JSONObject) jsonObject.get("ROOT");
                jsonObject= (JSONObject) jsonObject.get("Declaration");
                if("10".equals(jsonObject.get("Status").toString())){
                    ftpCli.connect();
                    download(OUT_PATH+ftpFile.getName(), new File(LOCALPATH + "/" + jsonObject.get("OrgMessageID").toString()+".xml"));
                    deleteFile(OUT_PATH+ftpFile.getName());
                }
            }

        }
    }
    public  static String readXmlToString(String ftpFile, FTPClient ftp) {
        StringBuffer buffer=new StringBuffer("");
        String str = "";
        InputStream is = null;
        BufferedReader br = null;
        try {
            // 获取ftp上的文件
            is = ftp.retrieveFileStream(ftpFile);
            //转为字节流
            br = new BufferedReader(new InputStreamReader(is));
            while((str=br.readLine())!=null){
                buffer.append(str);
            }
            br.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return buffer.toString();
    }
}
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