java ftp 文件下载

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import java.io.BufferedReader;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.SocketException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPReply;import com.eastcom.common.utils.StringUtils;public class FtpFileUtils {    private static Log logger = LogFactory.getLog(FtpFileUtils.class);    // private static String ftpHost = "172.16.100.90";    // private static String ftpPassword = "Ivr123!@#";    // private static String ftpHost = "192.168.37.27";    // private static String ftpPassword = "ipnet";    // private static String ftpUserName = "ipnet";    // private static int ftpPort = 21;    /**     * 获取FTPClient对象     *      * @param ftpHost     * @param ftpPassword     * @param ftpUserName     * @param ftpPort     *            FTP端口 默认为21     * @return     */    private static FTPClient getFTPClient(String filePath, Map<String, String> ftpParams) {        FTPClient ftpClient = null;        String ftpHost = ftpParams.get("ftpHost");        String ftpPassword = ftpParams.get("ftpPassword");        String ftpUserName = ftpParams.get("ftpUserName");        int ftpPort = Integer.valueOf(ftpParams.get("ftpPort"));        try {            ftpClient = new FTPClient();            ftpClient.connect(ftpHost, ftpPort);            ftpClient.login(ftpUserName, ftpPassword);            ftpClient.setControlEncoding("UTF-8");            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);            ftpClient.changeWorkingDirectory(filePath);            ftpClient.enterLocalPassiveMode();            if (!FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) {                logger.info(" can not connect to ftp ----------");                ftpClient.disconnect();            } else {                logger.info("FTP successful----------------");            }        } catch (SocketException e) {            e.printStackTrace();            logger.info("check ftp ip ");        } catch (IOException e) {            e.printStackTrace();            logger.info("check ftp ftpPort");        }        return ftpClient;    }    /**     * 去 服务器的FTP路径下上读取文件     *      * @param ftpUserName     * @param ftpPassword     * @param ftpPath     * @param FTPServer     * @return     */    public static List<String> readFtpFile(String fileName, String filePath, Map<String, String> ftpParams) {        BufferedReader reader = null;        InputStream ins = null;        List<String> list = new ArrayList<String>();        FTPClient ftpClient = getFTPClient(filePath, ftpParams);        logger.info("begin to read " + filePath + " " + fileName + " file");        try {            ins = ftpClient.retrieveFileStream(fileName);            reader = new BufferedReader(new InputStreamReader(ins, "GBK"));        } catch (FileNotFoundException e) {            logger.error("can not find " + filePath + "file");            e.printStackTrace();        } catch (SocketException e) {            logger.error("connect ftp failed ");            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();            logger.error("read file failed");        } finally {            // 关闭FTP连接服务            if (ftpClient != null && ftpClient.isConnected())                try {                    ftpClient.disconnect();                } catch (IOException e) {                    logger.error("close the connection to FTP SERVER  failed");                    e.printStackTrace();                }        }        if (reader != null) {            String data = null;            try {                while (StringUtils.isNotBlank(data = reader.readLine())) {                    list.add(data);                }            } catch (IOException e) {                e.printStackTrace();                logger.error("read file failed");            } finally {                try {                    reader.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        } else {            logger.error("in is null ,can not read file");        }        if (ins != null) {            try {                ins.close();            } catch (IOException e) {                e.printStackTrace();            }        }        logger.info(" read " + filePath + " " + fileName + " file end ");        return list;    }    /**     * 返回服务器路径下所有存在的数据文件名     *      * @param filePath     *            服务器路径     * @param fileNameBegin     *            文件名前缀     * @return     */    public static List<String> listNames(String filePath, String fileNameBegin, Map<String, String> ftpParams) {        List<String> list = new ArrayList<String>();        FTPClient ftpClient = getFTPClient(filePath, ftpParams);        String[] names = null;        try {            names = ftpClient.listNames();        } catch (IOException e) {            logger.info("No data file exit in the path : " + filePath);            e.printStackTrace();        } finally {            // 关闭FTP连接服务            if (ftpClient != null && ftpClient.isConnected())                try {                    ftpClient.logout();                    ftpClient.disconnect();                } catch (IOException e) {                    logger.error("close the connection to FTP SERVER  failed");                    e.printStackTrace();                }        }        if (names != null) {            for (String name : names)                if (name.startsWith(fileNameBegin))                    list.add(name);        } else {            logger.info("no file exit in the path : " + filePath);        }        return list;    }    public static void main(String[] args) {        String filePath = "/home/ipnet/15mi/";        Map<String, String> ftpParams = new HashMap<String, String>();        ftpParams.put("ftpHost", "172.16.100.90");        ftpParams.put("ftpPort", "21");        ftpParams.put("ftpUserName", "ipnet");        ftpParams.put("ftpPassword", "Ivr123!@#");        List<String> fileNames = listNames(filePath, "page_detail_data_", ftpParams);        for (String fileName : fileNames)            readFtpFile(fileName, filePath, ftpParams);    }}
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