java 上傳，下載，寫入到ftp

 如果寫入文件到ftp時要改變編碼的話用 ftpClient.setAutodetectUTF8(true);而不是string.getbates("utf-8").編碼影響到了md5，sha等加密的值。親試過的坑

import com.vividsolutions.jts.io.InputStreamInStream;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;

import java.io.*;
import java.net.MalformedURLException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class FtpUtils {
    private static final Logger logger = LoggerFactory.getLogger(FtpUtils.class);



    public FTPClient ftpClient = null;

    /**
     * 初始化ftp服務器
     */
    public boolean initFtpClient() {
        ftpClient = new FTPClient();
        ftpClient.setControlEncoding("utf-8");
        try {
            logger.info("連接ftp服務器:"+ BaseParamConfig.hostname+":"+BaseParamConfig.port);
            ftpClient.connect(BaseParamConfig.hostname, BaseParamConfig.port); //連接ftp服務器
            ftpClient.login(BaseParamConfig.username, BaseParamConfig.password); //登錄ftp服務器
            int replyCode = ftpClient.getReplyCode(); //是否成功登錄服務器
            if(!FTPReply.isPositiveCompletion(replyCode)){
                logger.error("【郵儲清分】連接失敗...ftp服務器:");
                return false;
            }
            logger.info("連接成功...ftp服務器:");
        }catch (MalformedURLException e) {
            e.printStackTrace();
            logger.error("【郵儲清分】連接出現異常-----"+e.getMessage());
            return false;
        }catch (IOException e) {
            e.printStackTrace();
            logger.error("【郵儲清分】連接出現異常-----"+e.getMessage());
            return false;
        }

        return true;
    }

    /**
     * 把文件寫入到ftp
     * startName 開始文件名
     * path 路勁
     * fileContent 內容
     * fileName 文件名全名
     */
     public boolean  writeFile(String path,String fileContent,String fileName,String startName){

         logger.info("開始執行寫入--"+"路徑： "+path +" 文件名："+fileName);
         InputStream is = null;
         try {
             // 1.輸入流
          is = new ByteArrayInputStream(fileContent.getBytes());
           //  Inputin = new InputStreamInStream(is);
            // 4.指定寫入的目錄
            ftpClient.changeWorkingDirectory(path);

             FTPFile[] ftpFiles = ftpClient.listFiles();
             //因爲文件經過加密 密值都不同 覆蓋不了原先文件 所以要先刪除當日之前上傳過的文件
             for (int i = 0; i < ftpFiles.length; i++) {
                 String name = ftpFiles[i].getName();//文件名
                 if (name.startsWith(startName)) {
                     ftpClient.dele(name);
                     logger.info("刪除了文件:{}",name);
                 }

             }

             //5.寫操作
             ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
             ftpClient.setFileTransferMode(FTPClient.BINARY_FILE_TYPE);
             ftpClient.setAutodetectUTF8(true);
             ftpClient.storeFile(fileName, is);
             FTPFile[] ftpFiles2 = ftpClient.listFiles();
             ftpClient.logout();
         } catch (IOException e) {
             e.printStackTrace();
             logger.warn("【郵儲清分】寫入文件時出現異常---"+e.getMessage());
             return false;
         }finally {
             if (ftpClient.isConnected()) {
                 try {
                     ftpClient.disconnect();
                 } catch (Exception e) {
                     e.printStackTrace();
                     logger.warn("【郵儲清分】寫入文件時出現異常---"+e.getMessage());
                     return false;
                 }
             }

         }
         return true;
     }

    /**
     * 上傳文件
     * @param pathname ftp服務保存地址
     * @param fileName 上傳到ftp的文件名
     *  @param originfilename 待上傳文件的名稱（絕對地址） *
     * @return
     */
    public  boolean uploadFile( String pathname, String fileName,String originfilename){
        boolean flag = false;
        InputStream inputStream = null;
        try{
            System.out.println("開始上傳文件");
            inputStream = new FileInputStream(new File(originfilename));
            initFtpClient();
            ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);
            CreateDirecroty(pathname);
            ftpClient.makeDirectory(pathname);
            ftpClient.changeWorkingDirectory(pathname);
            ftpClient.storeFile(fileName, inputStream);
            inputStream.close();
            ftpClient.logout();
            flag = true;
            System.out.println("上傳文件成功");
        }catch (Exception e) {
            System.out.println("上傳文件失敗");
            e.printStackTrace();
        }finally{
            if(ftpClient.isConnected()){
                try{
                    ftpClient.disconnect();
                }catch(IOException e){
                    e.printStackTrace();
                }
            }
            if(null != inputStream){
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return true;
    }
    /**
     * 上傳文件
     * @param pathname ftp服務保存地址
     * @param fileName 上傳到ftp的文件名
     * @param inputStream 輸入文件流
     * @return
     */
    public boolean uploadFile( String pathname, String fileName,InputStream inputStream){
        boolean flag = false;
        try{
            System.out.println("開始上傳文件");
            initFtpClient();
            ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);
            CreateDirecroty(pathname);
            ftpClient.makeDirectory(pathname);
            ftpClient.changeWorkingDirectory(pathname);
            ftpClient.storeFile(fileName, inputStream);
            inputStream.close();
            ftpClient.logout();
            flag = true;
            System.out.println("上傳文件成功");
        }catch (Exception e) {
            System.out.println("上傳文件失敗");
            e.printStackTrace();
        }finally{
            if(ftpClient.isConnected()){
                try{
                    ftpClient.disconnect();
                }catch(IOException e){
                    e.printStackTrace();
                }
            }
            if(null != inputStream){
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return true;
    }
    //改變目錄路徑
    public boolean changeWorkingDirectory(String directory) {
        boolean flag = true;
        try {
            flag = ftpClient.changeWorkingDirectory(directory);
            if (flag) {
                System.out.println("進入文件夾" + directory + " 成功！");

            } else {
                System.out.println("進入文件夾" + directory + " 失敗！開始創建文件夾");
            }
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
        return flag;
    }

    //創建多層目錄文件，如果有ftp服務器已存在該文件，則不創建，如果無，則創建
    public boolean CreateDirecroty(String remote) throws IOException {
        boolean success = true;
        String directory = remote + "/";
        // 如果遠程目錄不存在，則遞歸創建遠程服務器目錄
        if (!directory.equalsIgnoreCase("/") && !changeWorkingDirectory(new String(directory))) {
            int start = 0;
            int end = 0;
            if (directory.startsWith("/")) {
                start = 1;
            } else {
                start = 0;
            }
            end = directory.indexOf("/", start);
            String path = "";
            String paths = "";
            while (true) {
                String subDirectory = new String(remote.substring(start, end).getBytes("GBK"), "iso-8859-1");
                path = path + "/" + subDirectory;
                if (!existFile(path)) {
                    if (makeDirectory(subDirectory)) {
                        changeWorkingDirectory(subDirectory);
                    } else {
                        System.out.println("創建目錄[" + subDirectory + "]失敗");
                        changeWorkingDirectory(subDirectory);
                    }
                } else {
                    changeWorkingDirectory(subDirectory);
                }

                paths = paths + "/" + subDirectory;
                start = end + 1;
                end = directory.indexOf("/", start);
                // 檢查所有目錄是否創建完畢
                if (end <= start) {
                    break;
                }
            }
        }
        return success;
    }

    //判斷ftp服務器文件是否存在
    public boolean existFile(String path) throws IOException {
        boolean flag = false;
        FTPFile[] ftpFileArr = ftpClient.listFiles(path);
        if (ftpFileArr.length > 0) {
            flag = true;
        }
        return flag;
    }
    //創建目錄
    public boolean makeDirectory(String dir) {
        boolean flag = true;
        try {
            flag = ftpClient.makeDirectory(dir);
            if (flag) {
                System.out.println("創建文件夾" + dir + " 成功！");

            } else {
                System.out.println("創建文件夾" + dir + " 失敗！");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 根據條件模糊查詢文件
     * pathname linux絕對路徑
     * filename 開頭字符串 如：Q_20181011
     */
    public FtpSettleVO likeFileList(String pathname, String filename, String endFileName) {

        FtpSettleVO settleVO = new FtpSettleVO();

        logger.info("開始讀取郵儲回盤的文件---"+"路徑："+pathname +" 開頭名:"+filename+" 結束名: "+endFileName);
        List<String > lists = new ArrayList<>();
        try {
            ftpClient.changeWorkingDirectory(pathname);

            FTPFile[] ftpFiles = ftpClient.listFiles();
            //現在只做讀取單個就退出
            for (int i = 0; i < ftpFiles.length; i++) {
                String name = ftpFiles[i].getName();//文件名
                logger.info("正在讀取的文件名稱---"+name);
                if (name.startsWith(filename)&&name.endsWith(endFileName)) {
                    logger.info("正在執行的文件名稱---"+name);
                    InputStream ins = null;
                    StringBuilder builder = null;
                    String  str="";
                    try {
                        // 從服務器上讀取指定的文件
                        ins = ftpClient.retrieveFileStream(ftpFiles[i].getName());
                        BufferedReader reader = new BufferedReader(new InputStreamReader(ins, "utf-8"));
                        String line;
                        builder = new StringBuilder();
                        int s=0;
                        while ((line = reader.readLine()) != null) {
                            if (s>0){
                                builder.append("\n");
                            }
                            lists.add(line);
                            builder.append(line);
                            s++;
                        }
                        str =   builder.toString();
                        str = new String(str.getBytes("gbk"));

                        reader.close();
                        if (ins != null) {
                            ins.close();
                        }           //主動調用一次getReply()把接下來的226消費掉. 這樣做是可以解決這個返回null問題
                        ftpClient.getReply();
                    } catch (Exception e) {
                        e.printStackTrace();
                        settleVO.setExMessage(e.toString()+":"+e.getMessage());
                        logger.warn("執行讀取文件出現異常-----"+e.getMessage());
                    }
                    settleVO.setFileName(name);
                    settleVO.setConten(str);
                    settleVO.setList(lists);
                    return settleVO;

                }

            }
            ftpClient.logout();

            settleVO.setList(lists);
            return settleVO;
    } catch (IOException e) {
            e.printStackTrace();
            settleVO.setExMessage(e.toString()+":"+e.getMessage());
            logger.warn("【郵儲清分】讀取文件時出現異常-----"+e.getMessage());
        } finally {
            if(ftpClient.isConnected()){
                try{
                    ftpClient.disconnect();
                }catch(IOException e){
                    e.printStackTrace();
                    settleVO.setExMessage(e.toString()+":"+e.getMessage());
                    logger.warn("【郵儲清分】讀取文件時出現異常-----"+e.getMessage());
                }
            }
        }

        return settleVO;
    }
    /** * 下載文件 *
     * @param pathname FTP服務器文件目錄 *
     * @param filename 文件名稱 *
     * @param localpath 下載後的文件路徑 *
     * @return */
    public  boolean downloadFile(String pathname, String filename, String localpath){
        boolean flag = false;
        OutputStream os=null;
        try {
            System.out.println("開始下載文件");
            initFtpClient();
            //切換FTP目錄
            ftpClient.changeWorkingDirectory(pathname);

            FTPFile[] ftpFiles = ftpClient.listFiles();
            for(FTPFile file : ftpFiles){
                if(filename.equalsIgnoreCase(file.getName())){
                    File localFile = new File(localpath + "/" + file.getName());
                    os = new FileOutputStream(localFile);
                    ftpClient.retrieveFile(file.getName(), os);
                    os.close();
                }
            }
            ftpClient.logout();
            flag = true;
            System.out.println("下載文件成功");
        } catch (Exception e) {
            System.out.println("下載文件失敗");
            e.printStackTrace();
        } finally{
            if(ftpClient.isConnected()){
                try{
                    ftpClient.disconnect();
                }catch(IOException e){
                    e.printStackTrace();
                }
            }
            if(null != os){
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return flag;
    }

    /** * 刪除文件 *
     * @param pathname FTP服務器保存目錄 *
     * @param filename 要刪除的文件名稱 *
     * @return */
    public boolean deleteFile(String pathname, String filename){
        boolean flag = false;
        try {
            System.out.println("開始刪除文件");
            initFtpClient();
            //切換FTP目錄
            ftpClient.changeWorkingDirectory(pathname);
            ftpClient.dele(filename);
            ftpClient.logout();
            flag = true;
            System.out.println("刪除文件成功");
        } catch (Exception e) {
            System.out.println("刪除文件失敗");
            e.printStackTrace();
        } finally {
            if(ftpClient.isConnected()){
                try{
                    ftpClient.disconnect();
                }catch(IOException e){
                    e.printStackTrace();
                }
            }
        }
        return flag;
    }



    public static void main(String[] args) {
        FtpUtils ftp =new FtpUtils();
        ftp.initFtpClient();

        ClearingVO clea = new ClearingVO();
        clea.setMerchant("00023155");
        clea.setMerchantName("大神");
        clea.setDate(DateUtil.getYYYYMMDD(new Date()));
        String number = Myutil.formatDate();
        clea.setOrderNo(number);
        clea.setBankNo("");
        clea.setAccountName("張三");
        clea.setAccount("6210985800000004763");
        clea.setMoney("10000");
        clea.setSummary("無摘要");
        clea.setRemark("這筆是正確的");
        List<ClearingVO>   list = new ArrayList<>();
        for (int i = 0; i < 30; i++) {
            list.add(clea);
        }

        //模擬郵儲清分
        StringBuilder str = new StringBuilder();
        str.append("30");//總筆數
        str.append("|");
        str.append("300000");//總金額
        str.append("|");
        int a =0;
        for (ClearingVO c:list) {
            a++;
            str.append("\n");
            str.append(a);//清分id
            str.append("|");
            str.append(Myutil.toString(c.getMerchant()));//商戶號
            str.append("|");
            str.append(Myutil.toString(c.getMerchantName()));//商戶名
            str.append("|");
            str.append(c.getDate());//訂單日期
            str.append("|");
            str.append(c.getOrderNo()+a);//訂單號
            str.append("|");
            str.append(Myutil.toString(c.getBankNo()));//支付行號
            str.append("|");
            str.append(Myutil.toString(c.getAccountName()));//收款人姓名
            str.append("|");
            str.append(Myutil.toString(c.getAccount()));//收款賬號
            str.append("|");
            str.append(Myutil.toString(c.getMoney()));//清分金額
            str.append("|");
            str.append(Myutil.toString(c.getSummary()));//摘要
            str.append("|");
            str.append(Myutil.toString(c.getRemark()));//備註
            str.append("|");
        }
     //   System.out.println(str.toString());
        //文件名 文件名規格 請求文件名 QS_YYYYMMDDNNN_XXX_Q.txt
      //  String fileName ="QS_"+DateUtil.getYYYYMMDD(new Date())+"001"+"_001"+"_Q.txt";

        /**
         * 把內容寫成TXT 傳到ftp
         */
        //  boolean result =    ftp.writeFile("/zcode",str.toString(),fileName);
      //  boolean result =    ftp.writeFile("/postal",str.toString(),"ftp.txt");
       // System.out.println(result);
        /**
         * 根據模糊條件讀取ftp文件
         */
       // String fileName ="QS_"+DateUtil.getYYYYMMDD(new Date())+"001"+"_001"+"_R.txt";
        String fileName ="QS_20181017";
     List<String > lists =    ftp.likeFileList("/postal",fileName,"001_R.txt");

}