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解决FTP服务器上中文名文件下载后为空的问题

2017年07月20日 15:19:21 代码的寂寞阅读数 2428

有台服务器，编码为GBK，发现服务器上的中文文件下载后文件大小为0，打开为空白。

经调查，是文件名编码格式不对导致，对于中文情况，使用FTPClient时编码格式需使用ISO-8859-1

具体代码：

package com.neusoft.ftptest;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

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;

public class FtpMain {

    public static void main(String[] args) {

        FTPClient client = new FTPClient();

        try {

            client.connect("10.10.xxx.xxx", 21);

            client.login("administrator", "xxx");

            System.out.println(client.getControlEncoding());

            int reply = client.getReplyCode();

            if (!FTPReply.isPositiveCompletion(reply)) {

                client.disconnect();

                System.out.println("Login error");

                return;

            }

            client.setControlEncoding("GBK");

            // client.segt

            System.out.println(client.getCharsetName());

            // client.enterRemotePassiveMode();

            client.enterLocalPassiveMode();

            client.changeWorkingDirectory("11_COMMUNICATION/201204");

            System.out.println("---------------------------------------");

            String[] names;

            names = client.listNames();

            for (int i = 0; i < names.length; i++) {

                System.out.println(names[i]);

            }

            System.out.println(names.toString());

            System.out.println("---------------------------------------");

            FTPFile f = client.listFiles()[0];

            System.out.println(f.getLink());

            client.changeWorkingDirectory("/");

            String path = "/10_NOTICE_FILE/201706";

            // String path = "/10_NOTICE_FILE/201203/";

            client.setBufferSize(1024);

            client.setFileType(FTP.BINARY_FILE_TYPE);

            client.enterLocalPassiveMode();

            client.changeWorkingDirectory(path);

            FTPFile[] fs = client.listFiles();

            FileOutputStream out = null;

            InputStream in = null;

            for (int i = 0; i < fs.length; i++) {

                FTPFile ff = fs[i];

                String outFileName = ff.getName();

                System.out.println(outFileName);

                //本地目录文件不需要编码

                File localFile = new File("D:\\ftp\\" + ff.getName());

                OutputStream fos = new FileOutputStream(localFile);

                // ftp需使用ISO-8859-1编码格式

                String localFileName = new String(ff.getName().getBytes("GBK"), "ISO-8859-1");

                client.retrieveFile(localFileName, fos);

                fos.close();

            }

        } catch (Exception e) {

            e.printStackTrace();

        } finally{

            try {

                client.disconnect();

            } catch (IOException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

}