ftpClient 记录

package com.ftp_copyFile;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.Properties;import org.apache.commons.net.ftp.FTPClient;public class ftpMain{    public static void main(String[] args)    {        int ftpPort = 0;        String ftpUserName = "";        String ftpPassword = "";        String ftpHost = "";        String ftpPath = "";        try        {            InputStream in = FTPUtil.class.getClassLoader().getResourceAsStream("ftp.properties");            if (in == null)            {                System.out.println("配置文件ftp.properties读取失败");            }            else            {                Properties properties = new Properties();                properties.load(in);                ftpUserName = properties.getProperty("ftpUserName");                ftpPassword = properties.getProperty("ftpPassword");                ftpHost = properties.getProperty("ftpHost");                ftpPort = Integer.valueOf(properties.getProperty("ftpPort")).intValue();                ftpPath = properties.getProperty("ftpPath");                ftpCopy(ftpUserName, ftpPassword, ftpPath, ftpHost, ftpPort,                        "a1.jpg");            }        }        catch (Exception e)        {            e.printStackTrace();            System.out.println(e.toString());        }    }    public static boolean ftpCopy(String ftpUserName, String ftpPassword,            String ftpPath, String ftpHost, int ftpPort, String fileName)            throws IOException    {        InputStream in = null;        FTPClient ftpClient = null;        boolean copyFalg = false;        try        {            ftpClient = FTPUtil.getFTPClient(ftpHost, ftpPassword, ftpUserName, ftpPort);//            ftpClient.setControlEncoding("UTF-8"); // 中文支持            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);            ftpClient.enterLocalPassiveMode();            ftpClient.setDefaultTimeout(2*60*1000);            ftpClient.setSoTimeout(5*60*1000);            ftpClient.setBufferSize(1024);            ftpClient.changeWorkingDirectory(ftpPath);            //获取输入流            in = ftpClient.retrieveFileStream(fileName);            fileName = "new_" + fileName;            // 调用完之后必须调用completePendingCommand释放,否则FTP会断开连接            if (!ftpClient.completePendingCommand())            {                copyFalg = false;                return copyFalg;            }            // 如果读取的文件流不为空则复制文件            if (in != null)            {                copyFalg = ftpClient.storeFile(fileName, in);                // 关闭文件流                in.close();                if (!copyFalg)                {                    return copyFalg;                }            }        }        catch (FileNotFoundException e)        {            System.out.println(e.toString());        }        return copyFalg;    }}

package com.ftp_copyFile;import java.io.IOException;import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPReply;public class FTPUtil{    /**     * 获取FTPClient对象     *     * @param ftpHost FTP主机服务器     * @param ftpPassword FTP 登录密码     * @param ftpUserName FTP登录用户名     * @param ftpPort FTP端口 默认为21     * @return     */    public static FTPClient getFTPClient(String ftpHost, String ftpPassword,            String ftpUserName, int ftpPort)    {        FTPClient ftpClient = null;        try        {            ftpClient = new FTPClient();            ftpClient.connect(ftpHost, ftpPort);// 连接FTP服务器            ftpClient.login(ftpUserName, ftpPassword);// 登陆FTP服务器            if (!FTPReply.isPositiveCompletion(ftpClient.getReplyCode()))            {                ftpClient.disconnect();            }        }        catch (IOException e)        {            e.printStackTrace();        }        return ftpClient;    }}

ftp.properties

ftpUserName=rootftpPassword=134ftpHost=10.41.200.23ftpPort=21ftpPath=/home/123writeTempFielPath=e\://

研究半天没找到解决方法，先记录下来。

有种思路是：分别获取新旧文件的输入输出流，然后进行读写操作，阻碍是：FTP服务器上大文件的输入流没法获取。

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改进实施：

            ftpClient2 = FTPUtil.getFTPClient(ftpHost, ftpPassword, ftpUserName, ftpPort);            ftpClient2.setFileType(FTPClient.BINARY_FILE_TYPE);            ftpClient2.enterLocalPassiveMode();            ftpClient2.setDefaultTimeout(2*60*1000);            ftpClient2.setSoTimeout(5*60*1000);            ftpClient2.setBufferSize(1024);            ftpClient2.changeWorkingDirectory(ftpPath);            out = ftpClient2.storeFileStream(fileName);            try            {                byte[] buffer = new byte[1024];                int temp = 0;                while (true)                {                    temp = in.read(buffer, 0, buffer.length);                    if (temp == -1)                    {                        break;                    }                    out.write(buffer, 0, temp);                }            }            catch(IOException e)            {                System.out.println(e.toString());            }            finally            {                try                {                    in.close();                    out.close();                }                catch(IOException e2)                {                    System.out.println(e2.toString());                }            }

也可适用于不同的FTP服务器之间，大文件可以成功，项目中未实际使用。